Research/Scholarly/Creative Works

• Lockington MR. and Hughes RN. (2021) Effects of olanzapine on anxiety-related behaviour in male and female rats assessed after 21-24 and 42-45 days of chronic treatment. Behavioural Pharmacology 32(23): 194-211. http://dx.doi.org/10.1097/FBP.0000000000000612. (Journal Articles)

• Dixon EI. and Hughes RN. (2019) Treatment with 1-benzylpiperazine (BZP) during adolescence of male and female hooded rats exposed to environmental enrichment: Subsequent behavioral outcomes. International Journal of Developmental Neuroscience 73: 32-40. http://dx.doi.org/10.1016/j.ijdevneu.2018.12.005. (Journal Articles)

• Hughes RN. (2019) Sex still matters: Has the prevalence of male-only studies of drug effects on rodent behaviour changed during the past decade? Behavioural Pharmacology 30(1): 95-99. http://dx.doi.org/10.1097/FBP.0000000000000410. (Journal Articles)

• Hughes RN. and Hamilton JJ. (2018) Sex-dependent modification by chronic caffeine of acute methamphetamine effects on anxiety-related behavior in rats. Behavioural Brain Research 345: 30-38. http://dx.doi.org/10.1016/j.bbr.2018.02.013. (Journal Articles)

• Aitchison LK. and Hughes RN. (2017) Exposure of adolescent rats to 1-benzylpiperazine or methamphetamine can increase adult anxiety while also (for methamphetamine) possibly improving spatial memory. Hersonissos, Crete: Biennial Meeting of the European Behavioural Pharmacology Society, 31 Aug-3 Sep 2017. (Conference Contributions - Other)

• Hughes RN. and Hancock NJ. (2017) Effects of acute caffeine on anxiety-related behavior in rats chronically exposed to the drug, with some evidence of possible withdrawal-reversal. Behavioural Brain Research 321: 87-98. http://dx.doi.org/10.1016/j.bbr.2016.12.019. (Journal Articles)

• Hughes RN. and Hancock NJ. (2017) Effects of acute caffeine on anxiety-related behavior in rats chronically exposed to the drug, with some evidence of possible withdrawal-reversal.. Behavioural Brain Research 321(1): 87-98. (Journal Articles)

• Peterson EK. and Hughes RN. (2017) Some observations of anxiety-related behavior in young adult rats following late adolescent exposure to methamphetamine with and without environmental enrichment.. Current Psychopharmacology 6(2): 172-178. http://dx.doi.org/10.2174/21556006666171019142026. (Journal Articles)

• Daniel JJ. and Hughes RN. (2016) Increased anxiety and impaired spatial memory in young adult rats following adolescent exposure to methylone. Pharmacology Biochemistry and Behavior 146-147: 44-49. http://dx.doi.org/10.1016/j.pbb.2016.05.003. (Journal Articles)

• Hughes RN. (2016) Neurobehavioral Aspects of Caffeine. Neuropathology of Drug Addictions and Substance Misuse: 775-784. http://dx.doi.org/10.1016/B978-0-12-800634-4.00077-9. (Chapters)

• Hughes RN. and Hancock NJ. (2016) Strain-dependent effects of acute caffeine on anxiety-related behavior in PVG/c, Long-Evans and Wistar rats. Pharmacology, Biochemistry and Behavior 140: 51-61. http://dx.doi.org/10.1016/j.pbb.2015.11.005. (Journal Articles)

• Lowther CL. and Hughes RN. (2016) Effects of acute and repeated administration of methamphetamine on aggression-related behavior during adolescence in male and female rats, and subsequent outcomes in early adulthood. Current Psychopharmacology 5(1): 38-46. http://dx.doi.org/10.2174/2211556005666160318003312. (Journal Articles)

• Gray VC. and Hughes RN. (2015) Drug-, dose- and sex-dependent effects of chronic fluoxetine, reboxetine and venlafaxine on open-field behavior and spatial memory in rats. Behavioural Brain Research 281: 43-54. http://dx.doi.org/10.1016/j.bbr.2014.12.023. (Journal Articles)

• Hughes RN. (2015) Strain- and response-dependent effects of caffeine on anxiety-related behaviour in rats. Verona, Italy: Joint European Brain Behaviour Society and European Behavioural Pharmacology Conference, 12-15 Sep 2015. (Conference Contributions - Other)

• Hughes RN., Hancock NJ. and Thompson RM. (2015) Anxiolysis and recognition memory enhancement with long-term supplemental ascorbic acid (vitamin C) in normal rats: possible dose dependency and sex differences. Annals of Neuroscience and Psychology 2: 2. (Journal Articles)

• Hughes RN., Hancock NJ., Henwood GA. and Rapley SA. (2014) Evidence for anxiolytic effects of acute caffeine on anxiety-related behavior in male and female rats tested with and without bright light. Behavioural Brain Research 271: 7-15. http://dx.doi.org/10.1016/j.bbr.2014.05.038. (Journal Articles)

• Hughes R. and Gray V. (2013) D.9 - Possible memory impairment in male and female rats following chronic treatment with fluoxetine, reboxetine and venlafaxine. Behavioural Pharmacology 24: e39-e40. http://dx.doi.org/10.1097/01.fbp.0000434816.42323.c6. (Journal Articles)

• Hughes RN. (2013) Modification by environmental enrichment of acute caffeine's behavioral effects on male and female rats. Journal of Caffeine Research 3(4): 156-162. http://dx.doi.org/10.1089/jcr.2013.0018. (Journal Articles)

• Hughes RN. and Gray V. (2013) Possible memory impairment in male and female rats following chronic treatment with fluoxetine, reboxetine and venlafaxine.. Behavioural Pharmacology 24: e39-e40. (Journal Articles)

• Hughes RN. and Gray VC. (2013) Possible memory impairment in male and female rats following chronic treatment with fluoxetine, reboxetine and venlafaxine. La Rochelle, France: Biennial Meeting of the European Behavioural Pharmacology Society, 6-9 Sep 2013. (Conference Contributions - Other)

• Hughes RN. and Otto MT. (2013) Anxiolytic effects of environmental enrichment attenuate sex-related anxiogenic effects of scopolamine in rats. Progress in Neuro-Psychopharmacology and Biological Psychiatry 40(1): 252-259. http://dx.doi.org/10.1016/j.pnpbp.2012.10.009. (Journal Articles)

• Johnson HNL. and Hughes RN. (2013) Acute methamphetamine and benzylpiperazine decrease aggression-related behavior in late adolescent male rats. Current Psychopharmacology 2(3): 222-228. http://dx.doi.org/10.2174/22115560113020990003. (Journal Articles)

• Kolyaduke OV. and Hughes RN. (2013) Increased anxiety-related behavior in male and female adult rats following early and late adolescent exposure to 3,4-methylenedioxymethamphetamine (MDMA). Pharmacology Biochemistry and Behavior 103(4): 742-749. http://dx.doi.org/10.1016/j.pbb.2012.12.004. (Journal Articles)

• Daly FM., Hughes RN. and Woodward LJ. (2012) Subsequent anxiety-related behavior in rats exposed to low-dose methadone during gestation, lactation or both periods consecutively. Pharmacology Biochemistry and Behavior 102(2): 381-389. http://dx.doi.org/10.1016/j.pbb.2012.05.010. (Journal Articles)

• Ferré S., Bach Jensen M., Kempf K., Martin S., Kolb H., Temple JL., Nardi AE., O'Connor PJ., Simola N. and Morelli M. (2011) What do you see as the main priorities, opportunities, and challenges in caffeine research in the next five years? Journal of Caffeine Research 1(1): 5-12. http://dx.doi.org/10.1089/jcr.2011.1203. (Journal Articles)

• Hughes RN. (2011) Adult anxiety-related behavior of rats following consumption during late adolescence of alcohol alone and in combination with caffeine. Alcohol 45(4): 365-372. http://dx.doi.org/10.1016/j.alcohol.2010.10.006. (Journal Articles)

• Hughes RN. (2011) Neurobehavioral Consequences of Exposure to Caffeine During Development: Important Issues and Areas of Concern. Journal of Caffeine Research 1(2): 97-99. http://dx.doi.org/10.1089/jcr.2011.1206. (Journal Articles)

• Hughes RN., Lowther CL. and van Nobelen M. (2011) Prolonged treatment with vitamins C and E separately and together decreases anxiety-related open-field behavior and acoustic startle in hooded rats. Pharmacology, Biochemistry and Behavior 97: 494-499. http://dx.doi.org/10.1016/j.pbb.2010.10.010. (Journal Articles)

• Hughes RN. (2010) A work in progress: Effects of drugs on the development of adolescent brain/behaviour processes. Rotorua, New Zealand: New Zealand Psychological Society Annual Conference 2010, 17-20 Jul 2010. (Conference Contributions - Other)

• Hughes RN. (2010) Subsequent effects on open-field responses of exposing male and female hooded rats each day to alcohol, caffeine and their combination during early and mid to late adolescence, and early adulthood (abstract). Neurotoxicology and Teratology 32: 503. http://dx.doi.org/10.1016/j.ntt.2010.04.028. (Journal Articles)

• Hughes RN. (2010) Subsequent effects on open-field responses of exposing male and female hooded rats each day to alcohol, caffeine and their combination during early and mid to late adolescence, and early adulthood. Louisville, KY, USA: 34th Annual Neurobehavioral Teratology Society Meeting (NBTS), 26-30 Jun 2010. (Conference Contributions - Other)

• Hughes RN. and Collins ME. (2010) Enhanced habituation and decreased anxiety by environmental enrichment and possible attenuation of these effects by chronic alpha-tocopherol (vitamin E) in aging male and female rats. Pharmacology, Biochemistry and Behavior 94(4): 534-542. http://dx.doi.org/10.1016/j.pbb.2009.11.008. (Journal Articles)

• Rucklidge JJ., Johnstone J., Harrison R., Taylor M., Whitehead K., Shaw I. and Hughes R. (2010) Micronutrients revisited: is there a role for micronutrients in the treatment of ADH after all? Amsterdam, Netherlands: Eunethydis ADHD Conference, 1-1 May 2010. (Conference Contributions - Other)

• Shaw I., Rucklidge JJ. and Hughes RN. (2010) A Possible Biological Mechanism for the B Vitamins Altering Behaviour in Attention-Deficit/Hyperactivity Disorder. Pharmaceutical Medicine 24(5): 289-294. (Journal Articles)

• Herbert CE. and Hughes RN. (2009) A comparison of 1-benzylpiperazine and methamphetamine in their acute effects on anxiety-related behavior of hooded rats. Pharmacology, Biochemistry and Behavior 92(2): 243-250. http://dx.doi.org/10.1016/j.pbb.2008.12.003. (Journal Articles)

• Aitchison LK. and Hughes RN. (2008) Some behavioural implications of exposure to benzylpiperazine (BZP) during different periods of postnatal development. Christchurch, New Zealand: The Annual Conference of The New Zealand Psychological Society, 29-31 Aug 2008. (Conference Contributions - Other)

• Anderson NL. and Hughes RN. (2008) Increased emotional reactivity in rats following exposure to caffeine during adolescence. Neurotoxicology and Teratology 30(3): 195-201. http://dx.doi.org/10.1016/j.ntt.2008.02.002. (Journal Articles)

• Anderson NL. and Hughes RN. (2008) Subsequent behavioural effects of exposure to caffeine during adolescence. Christchurch, New Zealand: The Annual Conference of The New Zealand Psychological Society, 29-31 Aug 2008. (Conference Contributions - Other)

• Daly FM., Hughes RN. and Woodward L. (2008) Developmental effects of exposure to methadone during gestation, lactation or both. Christchurch, New Zealand: The Annual Conference of The New Zealand Psychological Society, 29-31 Aug 2008. (Conference Contributions - Other)

• Hughes RN. (2008) Left right and centre: the scientific and professional influence of Michael Corballis. Auckland, New Zealand: From Mind to Brain: A Symposium in Honour of Michael Corballis, 01 Dec 2008. (Oral Presentations)

• Hughes RN. (2008) An intra-species demonstration of the independence of distance and time in turn alternation of the terrestrial isopod, Porcellio scaber. Behavioural Processes 78(1): 38-43. http://dx.doi.org/10.1016/j.beproc.2007.12.007. (Journal Articles)

• Hughes RN. (2007) Neotic preferences in laboratory rodents: Issues, assessment and substrates. Neuroscience and Biobehavioral Reviews 31(3): 441-464. http://dx.doi.org/10.1016/j.neubiorev.2006.11.004. (Journal Articles)

• Hughes RN. (2007) Rats' responsiveness to tactile changes encountered in the dark, and the role of mystacial vibrissae. Behavioural Brain Research 179(2): 273-280. http://dx.doi.org/10.1016/j.bbr.2007.02.023. (Journal Articles)

• Hughes RN. (2007) Sex does matter: Comments on the prevalence of male-only investigations of drug effects on rodent behaviour. Behavioural Pharmacology 18(7): 583-589. http://dx.doi.org/10.1097/FBP.0b013e3282eff0e8. (Journal Articles)

• Hughes RN. and Maginnity ME. (2007) Cues used by male and female hooded rats for locating a brightness change. Behavioural Processes 74(1): 79-87. http://dx.doi.org/10.1016/j.beproc.2006.09.014. (Journal Articles)

• Aitchison LK. and Hughes RN. (2006) Exposure to benzylpiperazine in adolescent rats: adulthood changes in anxiety-like behaviour. Christchurch, New Zealand: 13th Biennial Scientific Meeting of the International Society for Comparative Psychology, 31 Aug-3 Sep 2006. (Conference Contributions - Other)

• Aitchison LK. and Hughes RN. (2006) Treatment of adolescent rats with 1-benzylpiperazine: A preliminary study of subsequent behavioral effects. Neurotoxicology and Teratology 28(4): 453-458. http://dx.doi.org/10.1016/j.ntt.2006.05.005. (Journal Articles)

• Hughes RN. (2006) Behavioural teratology: principles and research. School of Psychology, Victoria University of Wellington, Wellington, New Zealand: Invited address, 15 Sep 2006. (Oral Presentations)

• Hughes RN. (2006) Variety: The very stuff of life. University of Canterbury, Christchurch, New Zealand: Public Lecture, 01 Jan 2006. (Oral Presentations)

• Hughes RN. (2006) Memory-dependent novelty-related location preferences: Sex-related attenuation of forgetting by D-glucose and tacrine. Behavioural Brain Research 166(1): 39-44. http://dx.doi.org/10.1016/j.bbr.2005.07.026. (Journal Articles)

• Hughes RN. and Maginnity M. (2005) Sex-dependent use by rats of intra- and extra-maze visual cues in their detection of a brightness change. Wellington, New Zealand: Conference of the New Zealand Association for Behaviour Analysis, 1 Aug 2005. (Conference Contributions - Other)

• Spencer J., Herbert A., Hughes R. and Metzer J. (2005) Review of the psychology programme at Victoria University of Wellington.Commissioned by Victoria University. (Reports)

• Hughes RN. (2004) Sex, drugs and the brain. Department of Psychology, University of Canterbury: 01 Oct 1987. (Oral Presentations)

• Hughes RN. (2004) Sweet memories: enhancement of memorial processes by d-glucose. Christchurch: Brain Research Forum, 01 Sep 2004. (Oral Presentations)

• Hughes RN. (2004) Responsiveness to brightness change in male and female rats following treatment with the partial agonist of the N-methyl-D-aspartate receptor, D-cycloserine. Behavioural Brain Research 152(2): 199-207. (Journal Articles)

• Hughes RN. (2004) Sex differences in the salience of spatial cues used by rats in detection of a brightness change. Australian Journal of Psychology 56: 118. (Journal Articles)

• Hughes RN. (2004) Sex differences in the salience of spatial cues used by rats in detection of a brightness change. Dunedin, New Zealand: 31st Australasian Experimental Psychology Conference (EPC'04), 16 Apr 2004. (Conference Contributions - Other)

• Hughes RN. (2004) Sex does matter: Differences between male and female rats in responsiveness to experimental treatments. Oviedo, Spain: Joint conference of the International Society for Comparative Psychology and the Sociedad Española Psicología Comparada, 1 Sep 2004. (Conference Contributions - Other)

• Hughes RN. (2004) The value of spontaneous alternation behavior (SAB) as a test of retention in pharmacological investigations of memory. Neuroscience & Biobehavioral Reviews 28(5): 497-505. (Journal Articles)

• Hughes RN. and Kleindienst HF. (2004) Sex-related responsiveness to changes in tactile stimulation in hooded rats. International Journal of Comparative Psychology 17: 339-350. (Journal Articles)

• Hughes RN., Desmond CS. and Fisher LCE. (2004) Room novelty, sex, scopolamine and their interactions as determinants of general activity and rearing, and light-dark preferences in rats. Behavioural Processes 67(2): 173-181. (Journal Articles)

• Hughes RN. (2003) Effects of glucose on responsiveness to change in young adult and middle-aged rats. Physiology & Behavior 78(4-5): 529-534. (Journal Articles)

• Hughes RN. (2003) The categorisation of male and female laboratory animals in terms of "gender". Brain Research Bulletin 60(3): 189-190. (Journal Articles)

• Hughes RN. and Neeson LT. (2003) Prevention of memory loss for a brightness change in adult and middle-aged rats by postacquisition treatment with glucose. Pharmacology Biochemistry and Behavior 76(1): 119-123. (Journal Articles)

• Hughes RN. (2002) Responsiveness to change in rats: an unlearned measure of visual recognition memory? Dunedin, New Zealand: NZ Behaviour Symposium, 1 Aug 2002. (Conference Contributions - Other)

• Hughes RN. (2002) Review of the psychological teaching and research at the University of the South Pacific.Commissioned by University of the South Pacific. (Reports)

• Hughes RN. (2002) Sex-related effects of glucose on responsiveness to brightness change in middle-aged rats. Pharmacology, Biochemistry and Behavior 73: 485-490. (Journal Articles)

• Hughes RN. (2001) Experimental research with laboratory animals: One sex or both? ANZCAART News 14(1): 5-6. (Journal Articles)

• Hughes RN. (2001) Responsiveness to brightness change in hooded rats: effects of sex and procedure. Behavioural Processes 55(3): 143-155. (Journal Articles)

• Hughes RN. (2000) Behavioural teratology: Some postnatal effects of perinatal exposure to caffeine. University of Edinburgh: Invited address to the Roslin Institute, 01 Oct 2001. (Oral Presentations)

• Hughes RN. (2000) Pharmacologically modified responsiveness to change in rats: Effects on memory? Sydney, Australia: 27th Annual Conference of the Australasian Society for the Study of Animal Behaviour (ASSAB 2000), 27 Apr 2000. (Conference Contributions - Other)

• Hughes RN. (1999) Sex differences in novelty-related preferences of hooded rats. The Quarterly Journal of Experimental Psychology Section B: Comparative and Physiological Psychology 52: 235-252. (Journal Articles)

• Hughes RN. (1998) An analysis of the response-to-change phenomenon in hooded rats. International Journal of Comparative Psychology 11: 50. (Journal Articles)

• Hughes RN. (1998) Spontaneous alternation behavior in animals: Mechanisms, motives and applications. In Hoffman RB; Scherrick MF; Warm JS (Ed.), Viewing psychology as a whole: The integrative science of William N. Dember: 269-286. Washington D.C.: American Psychological Association. (Chapters)

• Hughes RN. (1997) Intrinsic exploration in animals: Motives and measurement. Behavioural Processes 41: 213-226. (Journal Articles)

• Fisher CE. and Hughes RN. (1996) Effects of diazepam and chlorohexyladenosine on open-field behavior in rats perinatally exposed to caffeine. Life Sciences 58: 701-709. (Journal Articles)

• Fisher CE. and Hughes RN. (1996) Effects of diazepam and cyclohexyladenosine on open-field behavior in rats perinatally exposed to caffeine. LIFE SCIENCES 58(8): 701-709. http://dx.doi.org/10.1016/0024-3205(95)02339-9. (Journal Articles)

• Hughes RN. (1996) Caffeine anxieties. New Zealand Science Monthly 7: 14-15. (Journal Articles)

• Hughes RN. (1996) Drugs which induce anxiety: caffeine. New Zealand Journal of Psychology 25: 36-42. (Journal Articles)

• Hughes RN. (1996) Intrinsically motivated exploratory choice preferences. Montreal, Canada: International Society for Comparative Psychology, 1 Aug 1996. (Conference Contributions - Other)

• Hughes RN. (1996) Memory for previous turns in invertebrate alternation behavior. International Journal of Comparative Psychology 9: 66. (Journal Articles)

• Hughes RN. (1996) Memory for previous turns in invertebrate alternation behavior. Montreal, Canada: International Society for Comparative Psychology, 1 Aug 1996. (Conference Contributions - Other)

• Hughes RN. (1996) Methodological and conceptual issues in the comparative study of exploratory behaviour. Sao Paulo, Brazil: International Society for Comparative Psychology, 1 Aug 1996. (Conference Contributions - Other)

• Hughes RN. and Loader VG. (1996) Effects on elevated plus-maze behavior of exposure to caffeine during both gestation and lactation. Psychobiology. 24: 314-319. (Journal Articles)

• Hughes RN. (1995) Drug treatment of anxiety disorders. Ho Chi Minh City, Viet Nam: Keynote Address, Vietnamese National Institute of Mental Health, 16 Jun 2008. (Oral Presentations)

• Hughes RN. (1995) Drug treatment of unipolar depression. Ho Chi Minh City, Viet Nam: Keynote Address, Vietnamese National Institute of Mental Health, 20 Jun 2008. (Oral Presentations)

• Hughes RN. (1995) Nonspecific drug factors in psychopharmacology. Ho Chi Minh City, Viet Nam: Keynote Address, Vietnamese National Institute of Mental Health, 01 May 2005. (Oral Presentations)

• Hughes RN. (1995) Report of WHO consultancy to assess the availability and use of psychotropic medication in Viet Nam.Commissioned by United Nations World Health Organization.. (Reports)

• Hughes RN. (1994) Animal welfare and the behavioural sciences. Christchurch: New Zealand Council for the Care of Animals in Research and Teaching, 01 Sep 2008. (Oral Presentations)

• Hughes RN. (1994) Caffeine and mental health. Christchurch: Obsessive-compulsive Disorders Support Group, 01 Oct 1967. (Oral Presentations)

• Hughes RN. (1994) Animal welfare and the behavioural sciences. In Baker RM; Mellor DJ; Nicol AM (Ed.), Animal Welfare in the Twenty-first Century: Ethical, Educational and Scientific Challenges.: 67-69. Adelaide: ANZCCART. (Chapters)

• Hughes RN. (1993) Anxiety disorders. Christchurch: Agoraphobia Support Group, 01 Oct 1966. (Oral Presentations)

• Hughes RN. (1993) Caffeine abuse: Mental health consequences of excessive consumption. Porirua: Keynote Address, New Zealand Psychiatric Nursing Conference, 05 Jun 2009. (Oral Presentations)

• Hughes RN. (1993) Caffeine and behaviour: Effects on the unborn. Anxiety Disorders Team, Princess Margaret Hospital, Christchurch: 01 May 1973. (Oral Presentations)

• Hughes RN. (1993) Caffeine and behaviour: Effects on the unborn. Cincinnati, Ohio, USA: Invited address, Psychology Department, University of Cincinnati., 01 Apr 1994. (Oral Presentations)

• Hughes RN. (1993) Caffeine and behaviour: Effects on the unborn. Laboratoire de Psychophysiologie, Universit� Louis Pastur and Centre de Neurochimie, Strasbourg, Fra: 01 Oct 1984. (Oral Presentations)

• Hughes RN. (1993) Caffeine and behaviour: Effects on the unborn. Psychology Department, University College, Galway, Ireland: 01 Jul 1977. (Oral Presentations)

• Hughes RN. (1993) Caffeine and behaviour: Effects on the unborn. Psychology Department, Wake Forest University, Winstom-Salem, North Carolina, USA: 01 Jun 1993. (Oral Presentations)

• Hughes RN. (1993) Invertebrate turn alternation behaviour: A comparative perspective. Psychology and Biology Departments, University of North Carolina at Greensboro, North Carolina, USA: 01 Oct 1993. (Oral Presentations)

• Hughes RN. (1993) Performance-enhancement in sport: Effects of stimulant drugs. Galway, Ireland: Irish Neurosciences Society, 16 Oct 2008. (Oral Presentations)

• Hughes RN. (1993) Coffee, tea and the unborn: Effects of caffeine ingestion during pregnancy. Wellington, New Zealand: New Zealand Psychological Society, 1 Aug 1993. (Conference Contributions - Other)

• Hughes RN. (1993) Effects on open-field behavior of diazepam and buspirone alone and in combination with chronic caffeine. Life Sciences 53: 1217-1225. (Journal Articles)

• HUGHES RN. (1993) Relationships between sensation seeking and use of caffeine, alcohol and cigarettes by New Zealand university students. Drug and Alcohol Review 12(2): 169-173. http://dx.doi.org/10.1080/09595239300185601. (Journal Articles)

• Hughes RN. (1993) Relationships between sensation seeking and use of caffeine, alcohol and cigarettes by New Zealand university students. Drug and Alcohol Review 12: 168-173. (Journal Articles)

• Hughes RN. (1993) The motivation of exploratory behaviour: Why do animals spontaneously alternate? Christchurch, New Zealand: Australasian Society for the Study of Animal Behaviour, 1 Feb 1993. (Conference Contributions - Other)

• Hughes RN. (1992) Effectiveness of drugs as performance-enhancing aids in sport. GP Weekly 5 August: 20-23. (Journal Articles)

• Hughes RN. (1992) Effects of physostigmine on novelty-related location preferences. Pharmacology, Biochemistry and Behavior 43: 125-129. (Journal Articles)

• Hughes RN. (1992) Effects of substrate brightness differences on isopod (Porcellio scaber) turning and turn alternation. Behavioural Processes 27: 95-100. (Journal Articles)

• Hughes RN. (1992) Performance-enhancing effects of caffeine in sport. GP Weekly 13 May: 26. (Journal Articles)

• Hughes RN. (1992) Possible health consequences of excessive caffeine consumption. GP Weekly 22 April: 20-21. (Journal Articles)

• Hughes RN. (1992) Sources of caffeine and its effects on pharmacotherapy. GP Weekly 29 April: 25-26. (Journal Articles)

• Hughes RN. (1992) The use of stimulant drugs as performance-enhancing aids in sport. Dunedin, New Zealand: New Zealand Psychological Society, 1 Aug 1992. (Conference Contributions - Other)

• Hughes RN. (1992) Visual preferences in an isopod: Form perception or skototaxis? Melbourne, Australia: Australasian Society for the Study of Animal Behaviour, 1 Apr 1992. (Conference Contributions - Other)

• Hughes RN. (1991) Stimulant drugs and sport: Mechanisms, myths and morality. Psychology Department, University of Canterbury: 01 Nov 1995. (Oral Presentations)

• Hughes RN. (1991) The role of self- and other animal-produced odors in rats' preferences for novelty in an exploration box. Psychobiology 19: 168-174. (Journal Articles)

• Hughes RN. and Beveridge IJ. (1991) Behavioral effects of exposure to caffeine during gestation, lactation or both. Neurotoxicology and Teratology 13: 641-647. (Journal Articles)

• Hughes RN. (1990) Attenuation of self-produced and other animal olfactory cues in the exploratory behaviour of laboratory rats. Brisbane, Australia: Australasian Society for the Study of Animal Behaviour, 1 Apr 1990. (Conference Contributions - Other)

• Hughes RN. (1990) Directional influences of the sixth leg in turn alternation of the terrestrial isopod, Porcellio scaber. Biology of Behaviour 15: 169-182. (Journal Articles)

• Hughes RN. (1990) Divided we stand, united we fall: A reply to Corballis. New Zealand Journal of Psychology 19: 83-85. (Journal Articles)

• Hughes RN. (1990) Hazards of coffee drinking: Some physical and psychological consequences of excessive caffeine consumption. Lincoln, New Zealand: Winter School on Alcohol and Other Drugs, 1 Aug 1990. (Conference Contributions - Other)

• Hughes RN. (1990) Mechanisms for turn alternation in the tunnelling mud crab Helice crassa. New Zealand Journal of Zoology 17: 185-189. (Journal Articles)

• Hughes RN. (1990) Sex-dependent habituation to novelty in rats. Current Psychology: Research and Reviews 9: 277-284. (Journal Articles)

• Hughes RN. (1990) The use of caffeine and other stimulants in sport. Lincoln, New Zealand: Winter School on Alcohol and Other Drugs, 1 Aug 1990. (Conference Contributions - Other)

• Hughes RN. and Beveridge IJ. (1990) Sex- and age-related effects of prenatal exposure to caffeine on open-field behavior, emergence latency and adrenal weights in rats. Life Sciences 47: 2075-2088. (Journal Articles)

• Hughes RN. (1989) Essential involvement of specific legs in turn alternation of the woodlouse Porcellio scaber. Comparative Biochemistry and Physiology 93A: 493-497. (Journal Articles)

• Hughes RN. (1989) Lack of spontaneous alternation in favor of perseveration in domestic fowls and pigeons. Behavioural Processes 20: 85-92. (Journal Articles)

• Hughes RN. (1989) Sex differences in spontaneous alternation and open-field behavior of hamsters: Habituation differences. Current Psychology: Research and Reviews 8: 144-150. (Journal Articles)

• Hughes RN. (1989) Tactile cues, bilaterally asymmetrical leg movements and body distortion in isopod turn alternation. International Journal of Comparative Psychology 2: 231-244. (Journal Articles)

• Hughes RN. (1989) Phylogenetic comparisons. In Dember WN; Richman CL (Ed.), Spontaneous Alternation Behavior: 39-57. New York: Springer-Verlag. (Chapters)

• Hughes RN., Blampied NM., Anderson GJ. and Wollett GJ. (1989) Methylscopolamine and conditioned location avoidance. Pharmacology, Biochemistry, & Behavior 33: 913-914. (Journal Articles)

• Hughes RN. (1988) Peripheral vs central effects of behaviourally active drugs. Psychology Department, University of Canterbury: 01 Nov 1995. (Oral Presentations)

• Hughes RN. (1988) Alternation of body turns: Functions and mechanisms. Sydney, Australia: International Congress of Psychology, 1 Aug 1988. (Conference Contributions - Other)

• Hughes RN. (1988) Involvement of specific legs in isopod turn alternation. Sydney, Australia: International Society for Comparative Psychology and Australasian Society for the Study of Animal Behaviour, 1 Aug 1988. (Conference Contributions - Other)

• Hughes RN. (1988) Spontaneous alternation behavior in hamsters. Current Psychological Research and Reviews 6: 331-336. (Journal Articles)

• Hughes RN. (1987) Behavioural teratofenesis: Caffeine and Anxiety States. Department of Psychological Medicine, Christchurch Clinical School: 01 Nov 1995. (Oral Presentations)

• Hughes RN. (1987) The role of the supervisor in postgraduate research. Lincoln College: Postgraduate Student Society, 18 May 2009. (Oral Presentations)

• Hughes RN. (1987) Effects of adrenalin on novelty choices and activity in rats. Life Sciences 41: 25-29. (Journal Articles)

• Hughes RN. (1987) Mechanisms for alternation in invertebrates. New York, NY, USA: American Psychological Association, 1 Aug 1987. (Conference Contributions - Other)

• Hughes RN. (1987) Mechanisms for turn alternation in four invertebrate species. Behavioural Processes 14: 89-103. (Journal Articles)

• Hughes RN. and Beveridge IJ. (1987) Effects of prenatal exposure to chronic caffeine on locomotor and emotional behavior. Psychobiology 15: 179-185. (Journal Articles)

• Hughes RN. and Pither JM. (1987) Chronic imipramine effects on exploratory behavior in rats. Pharmacology, Biochemistry and Behavior 27: 359-362. (Journal Articles)

• Hughes RN. (1986) Long-term behavioural effects of prenatal caffeine. Dunedin, New Zealand: New Zealand Psychological Society and Australasian Society for Clinical and Experimental Pharmacology, 1 Aug 1986. (Conference Contributions - Other)

• Hughes RN. and Beveridge IJ. (1986) Caffeine consumption during pregnancy: Consequences for offspring. Psychology Department, University of Canterbury: 01 Oct 2009. (Oral Presentations)

• Hughes RN. and Beveridge IJ. (1986) Behavioral effects of prenatal exposure to caffeine in rats. Life Sciences 38: 861-868. (Journal Articles)

• Hughes RN. and Beveridge IJ. (1986) Depressed activity in male but not female rats six months after prenatal exposure to caffeine. IRCS Medical Science 14: 319. (Journal Articles)

• Hughes RN. and Beveridge IJ. (1986) Effects of methylphenidate and chlorpromazine on behaviour of adult rats prenatally exposed to caffeine. IRCS Medical Science 14: 421-422. (Journal Articles)

• Shanahan MP. and Hughes RN. (1986) Potentiation of performance-induced anxiety by caffeine in coffee. Psychological Reports 59: 83-86. (Journal Articles)

• van Abeelen JHR. and Hughes RN. (1986) A note on behavioral divergence between two substrains of DBA/2 inbred mice. Behavior Genetics 16: 281-284. (Journal Articles)

• Hughes RN. (1985) Bilaterally asymmetrical leg movements: A mechanism for left-right differention? Psychology Department, The University of Auckland: 01 May 2009. (Oral Presentations)

• Hughes RN. (1985) Effects of caffeine ingestion on anxiety-related behaviour in adults. Psychology Department, The University of Auckland: 06 May 2009. (Oral Presentations)

• Hughes RN. (1985) Mechanisms for turn alternation in woodlice (Porcellio scaber): The role of bilaterally asymmetrical leg movements. Animal Leaning and Behaviour 13: 253-260. (Journal Articles)

• Hughes RN. (1984) Anxiogenic effects of caffeine. Psychology Department, University College, Cardiff, UK: 17 Apr 2009. (Oral Presentations)

• Hughes RN. (1984) Anxiolytic effects of beta-adrenergic blockade: Implications for psychology. Psychology Department, University of Hull, UK: 01 May 2009. (Oral Presentations)

• Hughes RN. (1984) Effects of mother's coffee-drinking on offspring behaviour. Psychology Department, University of Surrey, UK: 01 Jul 2008. (Oral Presentations)

• Hughes RN. (1984) Problems in the definition and measurement of exploratory behaviour. Nijmegan, The Netherlands: Dutch Behavior Genetics Society, 09 Feb 2008. (Oral Presentations)

• Hughes RN. (1984) The behaviour teratology of caffeine. Psychology Department, University of Reading, UK: 01 Jun 2009. (Oral Presentations)

• Hughes RN. (1984) The biological and psychological significance of invertebrate behaviour. Biological and Psychological Societies, University College, Swansea, UK: 01 Jan 2001. (Oral Presentations)

• Hughes RN. (1984) The psychology of left and right: A bug's eye view. Psychology Department, University of Canterbury: 01 Aug 1994. (Oral Presentations)

• Hughes RN. (1984) The psychology of left and right: A bug's eye view. Psychology Department, University of Exeter, UK: 01 Feb 2009. (Oral Presentations)

• Hughes RN. (1984) Cholinergic and monoaminergic substrates of startle habituation. Life Sciences 34: 2101-2105. (Journal Articles)

• Hughes RN. (1984) Minireview: Cholinergic and monoaminergic substrates of startle habituation. Life Sciences 34(22): 2101-2105. http://dx.doi.org/10.1016/0024-3205(84)90308-4. (Journal Articles)

• Hughes RN. (1983) Menstrual cycle influences on perceptual disembedding ability. Perceptual and Motor Skills 57: 107-110. (Journal Articles)

• Hughes RN. and De'Ath CP. (1983) Effects of prenatal caffeine on behaviour of young rats. IRCS Medical Science 11: 504-505. (Journal Articles)

• Hughes RN. and Shanahan MP. (1983) Some effects of caffeine on animal and human behaviour. Psychology Department, University of Canterbury: 01 Oct 1993. (Oral Presentations)

• Hughes RN. and Shearer KM. (1983) Level of retardation and choice-sequence preferences in hospitalized adults. Australian and New Zealand Journal of Developmental Disabilities 9: 85-88. (Journal Articles)

• Hughes RN. (1982) Sex differences in human behaviour: Perceptual disembedding ability. Psychology Department, University of Canterbury: 01 Jul 1993. (Oral Presentations)

• Hughes RN. (1982) A review of atropinic drug effects on exploratory choice behavior in laboratory rodents. Behavioral and Neural Biology 34: 5-41. (Journal Articles)

• Hughes RN. and Horsburgh RJ. (1982) Some behavioral effects of prenatal marginal zinc deficiency in young rats. Nutrition Research 2: 513-520. (Journal Articles)

• Hughes RS. and Hughes RN. (1982) Education for New Parenthood.Commissioned by Christchurch Branch, Society for Research on Women. (Reports)

• Marquand CJ. and Hughes RN. (1982) Psychosocial characteristics of coronary prone personality. The New Zealand Medical Journal 95: 376-379. (Journal Articles)

• Blampied NM., MacMahon SW. and Hughes RN. (1981) Aversive effects of scopolamine. Wellington, New Zealand: New Zealand Psychological Society, 1 Aug 1981. (Conference Contributions - Other)

• Horsburgh RJ. and Hughes RN. (1981) Modification of novelty preferences in rats by current and prior treatment with scopolamine and methylscopolamine. Psychopharmacology 73: 388-390. (Journal Articles)

• Hughes RN. (1981) Anti-anxiety effects of beta-adrenergic blockade: Theory and research. Department of Psychological Medicine, Christchurch Clinical School: 01 Jun 1993. (Oral Presentations)

• Hughes RN. (1981) Oxprenolol and diazepam effects on activity, novelty preference and timidity in rats. Life Sciences 29: 1089-1092. (Journal Articles)

• Hughes RN. (1981) Sex differences in field dependence: The role of menstrual cycle events. Wellington, New Zealand: New Zealand Psychological Society, 1 Aug 1981. (Conference Contributions - Other)

• Hughes RN. (1981) Sex differences in Group Embedded Figures Test performance in relation to sex-role, state and trait anxiety. Current Psychological Research 1: 227-234. (Journal Articles)

• McMahon SW., Blampied NM. and Hughes RN. (1981) Aversive stimulus properties of scopolamine. Pharmacology, Biochemistry, & Behavior 15: 389-392. (Journal Articles)

• Horsburgh RJ. and Hughes RN. (1980) The effects of topical corneal administration of scopolamine on rat's exploratory behaviour. IRCS Medical Science 8: 85. (Journal Articles)

• Hughes RN. (1980) Psychopharmacology: The study of drug effects on behaviour. Faculty of Science, University of Canterbury: 01 May 1993. (Oral Presentations)

• Hughes RN. (1980) Some basic issues in the biopharmacological control of behaviour. Department of Psychological Medicine, Christchurch Clinical School: 01 May 1993. (Oral Presentations)

• Hughes RN. and Beveridge IJ. (1980) Effects of experimenter and test location novelty on nonspecific activity in rats and its modification by methamphetamine. New Zealand Psychologist 9: 15-18. (Journal Articles)

• Strongman KT. and Hughes RN. (1980) Eating style and body weight. New Zealand Psychologist 9: 68-69. (Journal Articles)

• Hughes RN. (1979) Bem Sex-Role Inventory performance in students: Comparisons between New Zealand, Australian and American Samples. New Zealand Psychologist 8: 61-66. (Journal Articles)

• Hughes RN. (1979) Role of the aversive nature of scopolamine effects on habituation to novelty. Auckland, New Zealand: ANZAAS Congress, 1 Jan 1979. (Conference Contributions - Other)

• Hughes RN. (1979) Role of the aversive nature of scopolamine effects on habituation to novelty. Proceedings of the 49th ANZAAS Congress 2: 766. (Journal Articles)

• Hughes RN. (1979) Sex differences in field dependence: Cognitive style or test anxiety? Palmerson North, New Zealand: New Zealand Psychological Society, 1 Aug 1979. (Conference Contributions - Other)

• Hughes RN. (1978) The adaptive significance and neurochemical control of alternation and related phenomena. Psychology Department, University of Canterbury: 01 Apr 1991. (Oral Presentations)

• Hughes RN. (1978) Effects of blinding, antennectomy, food deprivation and simulated natural conditions on alternation in woodlice (Porcellio scaber). The Journal of Biological Psychology 20: 35-40. (Journal Articles)

• Hughes RN. (1978) Femininity, masculinity and androgyny in relation to sex differences in field dependence. Christchurch, New Zealand: New Zealand Psychological Society, 1 Aug 1978. (Conference Contributions - Other)

• Hughes RN. (1978) Scopolamine effects on preferences for novelty: A possible alternative to central cholinergic involvement in habituation. IRCS Journal of Medical Science 6: 165-168. (Journal Articles)

• Hughes RN. (1978) Sex differences in field dependence: Effects of unlimited time on Group Embedded Figures Test performance. Perceptual and Motor Skills 47: 1246. (Journal Articles)

• Hughes RN. (1978) Sex differences in field dependence: effects of unlimited time on Group Embedded Figures Test performance.. Perceptual and motor skills 47(3 Pt 2): 1246. http://dx.doi.org/10.2466/pms.1978.47.3f.1246. (Journal Articles)

• Hughes RN. and Daley VA. (1978) Sex and age effects on choice-sequence preferences of pre-school children. Psychological Reports 43: 20-22. (Journal Articles)

• Hughes RN., Hall CJ. and Chambers RL. (1978) Field dependence and the Eysenck Personality Inventory: A replication. Perceptual and Motor Skills 47: 1132. (Journal Articles)

• Hughes RN., Hall CJ. and Chambers RL. (1978) Field dependence and the Eysenck personality inventory: a replication.. Perceptual and Motor Skills 47(3 Pt 2): 1132. (Journal Articles)

• Hughes RN., Hawkins AB. and Moorhead BR. (1978) Choice-sequence preferences in retarded hospitalized adults. The Australian Journal of Mental Retardation 5: 138-142. (Journal Articles)

• Hughes RN., Hawkins B. and Moorhead BR. (1978) Choice-sequence preferences in retarded hospitalised adults. Australian Journal of Mental Retardation 5(4): 138-142. http://dx.doi.org/10.3109/13668257809015573. (Journal Articles)

• Hughes RN. (1977) Anticholinergic drug effects on habituation to novelty. Psychology Department, La Trobe University, Victoria, Australia: 01 May 1993. (Oral Presentations)

• Hughes RN. (1977) Central cholinergic control of habituation. Psychology Department, The University of Adelaide, South Australia: 01 May 1993. (Oral Presentations)

• Hughes RN. (1977) Types 1 and 2 personality as cardiovascular risk factors. Christchurch: CIBA-Geigy, 19 Oct 1995. (Oral Presentations)

• Hughes RN. and Bushnell JA. (1977) Further relationships between IPAT Anxiety Scale performance and infantile feeding experiences. Journal of Clinical Psychology 33: 698-700. (Journal Articles)

• Hughes RN. and Daley VA. (1977) Cholinergic involvement in spontaneous alternation. IRCS Medical Science 5: 94. (Journal Articles)

• Hughes RN. and Daley VA. (1977) Scopolamine effects on habituation to novelty: Role of state changes between exposure and test sessions. IRCS Medical Science 5: 575. (Journal Articles)

• Hughes RN. and MacMahon SW. (1977) Cholinergic control of habituation to novelty: An amended result. IRCS Medical Science 5: 209. (Journal Articles)

• Hughes RN., Syme LA. and Syme GJ. (1977) Open-field behaviour in sheep following treatment with the neuroleptics azaperone and acetylpromazine. Psychopharmacology 53(3): 321. http://dx.doi.org/10.1007/BF00492373. (Journal Articles)

• Hughes RN., Syme LA. and Syme GJ. (1977) Open-field behaviour in sheet following treatment with the neuroleptics azaperone and acetylpromazine. Psychoparmacology 52: 107-109. (Journal Articles)

• Hughes RN. (1976) Neuroleptic drug effects on sheep behaviour: An exercise in agricultural psychopharmacology. Hamilton, New Zealand: New Zealand Psychological Society, 1 Aug 1976. (Conference Contributions - Other)

• Hughes RN. and Greig AM. (1976) Effects of caffeine, methamphetamine and methylphenidate on reactions to novelty and activity in rats. Neuropharmacology 15: 673-676. (Journal Articles)

• Hughes RN. and MacMahon SW. (1976) Cholinergic control of habituation to novelty. IRCS Medical Science 4: 532. (Journal Articles)

• Hughes RN. and Trowland R. (1976) Physostigmine effects on activity and reactions to novelty. Life Sciences 19: 793-796. (Journal Articles)

• Hughes RN. (1975) Differences between three stimulant drugs in their qualitative and quantitative effects on unconditioned behaviour. Wellington, New Zealand: New Zealand Psychological Society, 1 Aug 1975. (Conference Contributions - Other)

• Hughes RN. (1975) Mythology and methodology in the study of exploratory behaviour. Melbourne, Australia: Australian Society for the Study of Animal Behaviour, 1 May 1975. (Conference Contributions - Other)

• Hughes RN. and Greig AM. (1975) Chlordiazepoxide effects on reactions to novelty with and without prior drug experience. Psychpharmacologia 42: 289-292. (Journal Articles)

• Hughes RN. and Greig AM. (1975) Spontaneous alternation in ferrets following treatment with scopolamine, chlordiazepoxide and caffeine. Physiological Psychology 3: 155-156. (Journal Articles)

• Hughes RN. and Hawkins AB. (1975) EPI and IPAT Anxiety Scale performance in young women as related to breast feeding during infancy. Journal of Clinical Psychology 31: 663-665. (Journal Articles)

• Hughes RN., Blampied NM. and Stewart WJ. (1975) Scopolamine induced changes in activity and reactions to novelty. Pharmacology, Biochemistry and Behavior 3: 731-734. (Journal Articles)

• Hughes RN. (1974) Central cholinergic involvement in habituation to novelty. Dunedin, New Zealand: New Zealand Psychological Society, 1 Aug 1974. (Conference Contributions - Other)

• Stewart WJ., Blampied NM. and Hughes RN. (1974) The effects of scopolamine on performance on a geometric progressive ratio schedule. Psychopharmacologia (Berlin) 38: 55-66. (Journal Articles)

• Hughes RN. (1973) Some recent advances in psychopharmacology. Hamilton: Ruakura Animal Research Centre, 14 May 2009. (Oral Presentations)

• Hughes RN. (1973) Assessment of early experience and sex effects on exploratory tendencies and reactivity to behaviourally active drugs in the rat. Perth, Australia: 45th ANZAAS Congress, 1 Aug 1973. (Conference Contributions - Other)

• Hughes RN. (1973) Effects of LSD on exploratory behavior and locomotion in rats. Behavioral Biology 9: 357-365. (Journal Articles)

• Hughes RN. (1973) Some effects of lysergic acid diethylamide (LSD-25) on the behaviour of rats. Auckland, New Zealand: New Zealand Psychological Society, 1 Aug 1973. (Conference Contributions - Other)

• Hughes RN. (1973) Spontaneous alternation in adult rabbits. Bulletin of the Psychonomic Society 2: 2. (Journal Articles)

• Hughes RN. (1972) Chlordiazepoxside modified exploration in rats. Psychopharmacologia (Berlin) 24: 462-469. (Journal Articles)

• Hughes RN. (1972) Methylphenidate induced inhibition of exploratory behavior in rats. Life Sciences 11: 161-167. (Journal Articles)

• Hughes RN. and Syme LA. (1972) The role of social isolation and sex in determining effects of chlordiazepoxide and methylphenidate on exploratory behaviour. Psychopharmacologia 27: 359-366. (Journal Articles)

• Syme LA. and Hughes RN. (1972) Social isolation in young rats: Effects of cage size on open-field behavior. Psychonomic Science 29: 25-26. (Journal Articles)

• Wild JM. and Hughes RN. (1972) Effects of postweaning handling on locomotor and exploratory behavior in young rats. Developmental Psychology 7: 76-79. (Journal Articles)

• Hughes RN. (1971) Drug effects on exploratory behaviour. Deapartment of Psychology, University of Canterbury:: 01 Mar 1988. (Oral Presentations)

• Hughes RN. (1971) Effects of behaviourally active drugs on reactions to novelty and locomotion. Christchurch, New Zealand: New Zealand Psychological Society, 1 Aug 1971. (Conference Contributions - Other)

• Hughes RN. (1971) Reactions to novelty following differential post-weaning rearing and handling. Perceptual and Motor Skills 32: 883-886. (Journal Articles)

• Dyne LJ. and Hughes RN. (1970) Effects of methylphenidate on activity and reactions to novelty in rats. Psychonomic Science 19: 267-268. (Journal Articles)

• Hughes RN. (1970) Effects of early postweaning handling on the development of exploration in the rat. Australian Psychologist 5: 324. (Journal Articles)

• Hughes RN. (1970) Effects of early postweaning handling on the development of exploration in the rat. Hobart, Australia: Australian Psychological Society, 1 Aug 1970. (Conference Contributions - Other)

• Hughes RN. and Swanberg KM. (1970) Effects of food deprivation on exploration in deprivationally naive rats. Australian Journal of Psychology 22: 79-84. (Journal Articles)

• Hughes RN. and Swanberg KM. (1970) Forcing, stimulus-change and alternation. Perceptual and Motor Skills 31: 902. (Journal Articles)

• Hughes RN. (1969) Exploration in three laboratory rodents. Perceptual and Motor Skills 28: 90. (Journal Articles)

• Hughes RN. (1969) Social facilitation of locomotion and exploration in rats. British Journal of Psychology 60: 385-388. (Journal Articles)

• Hughes RN. (1969) Some effects of early experience on adult exploratory behaviour. Adelaide, Australia: 41st ANZAAS Congress, 1 Aug 1969. (Conference Contributions - Other)

• Hughes RN. and Blackman DE. (1969) Stimulus change effects of forcing on maze arm selection in hamsters. The Quarterly Journal of Experimental Psychology 21: 55-57. (Journal Articles)

• Eastment AM. and Hughes RN. (1968) Reactions of ferret-polecat hybrids to complexity and change. Perceptual and Motor Skills 26: 935-938. (Journal Articles)

• Hughes RN. (1968) A re-examination of the effects of age on novelty reactions and exploration in rats. Australian Journal of Psychology 20: 197-201. (Journal Articles)

• Hughes RN. (1968) Behaviour of male and female rats with free choice of two environments differing in novelty. Animal Behaviour 16: 92-96. (Journal Articles)

• Hughes RN. (1968) Effects of age on novelty reactions and exploration in rats. The Quarterly Journal of Experimental Psychology 20: 189-192. (Journal Articles)

• Hughes RN. (1968) Effects of food deprivation, deprivation experience and sex on exploration in rats. British Journal of Psychology 59: 47-53. (Journal Articles)

• Hughes RN. (1968) Exploratory behaviour: Its motivation and general nature". Bulletin of the British Psychological Society 21: 191. (Journal Articles)

• Hughes RN. (1968) Social facilitation in rats as a function of reduced anxiety. Auckland, New Zealand: New Zealand Psychological Society, 1 Aug 1968. (Conference Contributions - Other)

• Hughes RN. (1967) Psychology as a biological science. Belfast, Northern Ireland: Biological Society, The Queen's University of Belfast, 20 May 2009. (Oral Presentations)

• Hughes RN. (1967) Effects of age and time of confinement to one environment on rat behaviour in two simultaneously presented environments differing in novelty. Belfast, Northern Ireland: British Psychological Society, 1 Apr 1967. (Conference Contributions - Other)

• Hughes RN. (1967) Effects of age and time of confinement to one environment on rat behaviour in two simultaneously presented environments differing in novelty. Bulletin of the British Psychological Society 20: 20A. (Journal Articles)

• Hughes RN. (1967) Effects of intertrial confinement and brightness change on ferret alternation behaviour. Psychological Reports 20: 679-681. (Journal Articles)

• Hughes RN. (1967) Exploratory behavior: Its motivation and general nature. Ballymascanlon, Ireland: Northern Ireland Branch of the British Psychological Society, 1 Oct 1967. (Conference Contributions - Other)

• Hughes RN. (1967) Studies of alternation and exploratory behaviour. Bulletin of the British Psychological Society 20: 43. (Journal Articles)

• Hughes RN. (1967) Turn alternation in woodlice (Porcellio scaber). Animal Behaviour 15: 282-286. (Journal Articles)

• Hughes RN. (1966) Studies of alternation and exploratory behaviour. Belfast, Northern Ireland: Northern Ireland Branch, British Psychological Society, 18 May 2009. (Oral Presentations)

• Hughes RN. (1966) Some observations of correcting behaviour in woodlice (Porcellio scaber). Animal Behaviour 14: 319. (Journal Articles)

• Hughes RN. (1966) Stimulus-change effects of forcing in alternation behaviour. Psychological Reports 19: 515-518. (Journal Articles)

• Hughes RN. (1965) Food deprivation and locomotor exploration in the white rat. Animal Behaviour 13: 30-32. (Journal Articles)

• Hughes RN. (1965) Spontaneous alternation and response to stimulus change in the ferret. Journal of Comparative and Physiological Psychology 60: 149-150. (Journal Articles)

• Pollard JS., Lysons AM. and Hughes RN. (1965) Size of closed field test and performance of rats. Australian Journal of Psychology 17: 217-219. (Journal Articles)

• Hughes RN. (1964) Responses by the ferret to stimulus change. British Journal of Psychology 55: 463-468. (Journal Articles)

• Hughes RN. (1964) Spatial discrimination reversal and overtraining in ferrets. Perceptual and Motor Skills 19: 817-818. (Journal Articles)

• Hughes RN. (1963) Stimulus-change as a determinant of spontaneous alternation and related behaviour. Auckland, New Zealand: New Zealand Branch, British Psychological Society, 1 Aug 1963. (Conference Contributions - Other)

• Hughes RN. (1962) Response to 'stimulus-change' in exploratory behaviour. Christchurch, New Zealand: 19th Science Congress of the Royal Society of New Zealand, 1 Aug 1962. (Conference Contributions - Other)

Editorial Work

• Current Psychopharmacology Editorial Board Member ( 2012 - 2023)
• International Journal of Comparative Psychology Editor ( 1997 - 2002)
• Journal of Caffeine Research Editorial Board Member ( 2010 - 2023)
• Journal of Caffeine Research Editorial Board Member ( 2010 - 2023)

Review and Refereeing

• Behavioural Processes; Journal of Caffeine Research; Journal of Comparative Psychology; Neurotoxicology; Physiology and Behavior; International Journal of Neuroscience; Behavioral Brain Functions; Behavioural Brain Research; Developmental Psychobiology; Neurobiology of Learning and Memory; Pharmacology Biochemistry and Behavior; Neuroscience Letters; Pharmacological Reports; Current Psychopharmacology; Appetite; Neurochemistry International ( 2012 - 2023)

Future Research

• Effects of drugs on behavioural development (perinatal, adolescent)
• Effects of memory enhancing agents
• Effects of anxiolytic drugs