Final answer:
Social psychologists study the fundamental attribution error, which is the tendency to overestimate internal factors and underestimate external factors on behavior.
Step-by-step explanation:
Social psychologists study how the power of the situation influences individuals' thoughts, feelings, and behaviors. They have identified a tendency called the fundamental attribution error, which refers to people's tendency to overestimate the effects of internal factors and underestimate the effects of external factors on behavior. This means that individuals often attribute other people's behaviors to internal factors (disposition) and their own behaviors to situational forces.