Childhood apraxia of speech (CAS) is a controversial disorder with continued debate over its existence, nature, and diagnosis. Due to these unresolved issues, a multitude of diagnostic methods are used across studies, limiting our understanding of the disorder and the challenges that affected children face. This study aims to resolve these controversies by repeatedly evaluating the presence/absence of CAS symptoms over time in New Zealand children aged 5-7 years with suspected CAS. The analysis of results will reveal which (if any) symptoms cluster together to form a ‘CAS construct’ across time, whether the same children within the sample consistently match a positive or negative CAS diagnosis over time, and the relative prominence of movement versus language representational symptoms within the disorder. This study is the first of its kind to explore the nature of CAS in a longitudinal design with repeated assessment points and without separation into a ‘CAS’ and ‘non CAS’ group at the outset of the study. The results will be critical in developing a robust CAS construct that future studies can employ to build a knowledge base for this disorder and that allow a better understanding of the challenges faced by New Zealand children within this population.