Health psychology is a specialty area that focuses on how biology, psychology, conduct, and social components affect health and illness. Developmental: Developmental psychology research the way in which people change or develop physically, emotionally, intellectually, and socially throughout their lives.
There are as many justifications to check psychology as there are college students studying psychology.
Psychology professors spend time researching their specialities when they are not within the classroom.
Experimental approach is influential on all of psychology like scientific, social, developmental etc.