In research on burnout, is the development of a cynical and callous feeling toward others.

The answer is: Depersonalization

Explanation:

Burnout is a syndrome, characterized by chronic unresolved work-related stress which leads to a state of physical, mental and emotional exhaustion.  

Christina Maslach described this syndrome in terms of depersonalization, emotional exhaustion, reduced feelings of professional accomplishments.

Depersonalization is defined as psychological withdrawal and the development of the negative, cynical, and callous feelings towards others.

answer; media advocacy;

answer; john b watson,(observable behavior);