Asserts that the behavior and development of an individual is a function in some unspecified way of the interaction between an individual's
biological state and
experience as modified by
cognition or mental activity. The phylogenetic model is often symbolized by the quasi-mathematical formula
BI =
f[(B x E)C], where
BI is the behavior of the individual;
f is "a function of;"
B is the individual's biological state;
E is experience, and;
C is cognition or mental activity. The brackets and parentheses within brackets convey the idea of complex interactions among enclosed elements. (See
mental representation;
phylogenetic perspective)