The motivation to incorporate aspects of the partner's identity to expand the self is called __________

Baby Lulay sucks on his own toes in the same way over and over again. This sequence of behaviors is an example of a:

a. reflex activity b. primary circular reaction c. secondary circular reaction d. tertiary circular reaction

In which stage of Piaget's theory of cognitive development do people begin to think logically about abstract concepts?

A) the sensorimotor stage B) the formal operational stage C) the concrete operational stage D) the preoperational stage