Before a child can display empathy and altruistic behaviors, the child needs to have cognition. piagetian intelligent social empathic

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.

on the first day of new student week, amber revealed to her roommate that she is a lesbian. this is an example of self-disclosure.