Answer:
social loafing
Step-by-step explanation:
Social loafing: In social psychology, the term social loafing is defined as the phenomenon in which an individual is prone to give less effort on a particular task if he or she is involved in a group rather than working alone.
When an individual tends to work in a group then he or she tends to improve his or her accomplishment on a particular task by enhancing his or her talent and skills in that particular group. Social loafing gets promoted through the size of the group.
In the question above, the decrease in Jerry’s effort would be best described in terms of social loafing.