Which of the following theorists placed the greatest emphasis on unconscious experience as an important influence in development?

____is released by fat cells to signal that the body has had enough to eat, and also influences basal metabolic rate (BMR)

a. Acetylcholine b. Serotonin c. Melatonin d. Leptin

In one of the first social psychological experiments ever conducted, researcher Max Ringelmann observed men as they pulled on a rope either alone, as part of a small group, or as part of a large group. He found that as the size of the group increased, ____

a. individual effort increased b. individual effort decreased c. the task took longer to complete d. the task took less time to complete