The mission of
childhood and adolescence is acquisition according K. Warner Schaie, a
developmental psychologist. Acquisitive stage is the first stage of cognitive
development in which the main developmental task is to acquire information and encompasses
all of childhood and adolescence.
<span>Object permanence. This typically starts to develop between 4-7 months of age. It's the ability to understand that things can levae their sight and that doesn't mean they're gone forever. It is a critical milestone in development.</span>
