The actual age score a child receives within a specific developmental area as compared to the chronological age
a broad term used to describe the maturity of thought process development A child may be older or younger in their thinking and processing information, than others, at a similar age
a measure of a child's development (in body size or motor skill or psychological function) expressed in terms of age norms
the child's developmental age is found by comparing the skills they have in a certain development area (eg language) with what is known about expected development (this may be different from their chronological age - see this page)