while on a date with his girlfriend, lenny discovered that she was depressed about a low exam grade. he…

while on a date with his girlfriend, lenny discovered that she was depressed about a low exam grade. he found that he began to feel dejected and they both talked very little and ended the date early. lennys change in mood best illustrates: social loafing. the mere exposure effect. the chameleon effect. the bystander effect.
Answer
Brief Explanations:
- Social loafing refers to people exerting less effort in a group. Not relevant here as it's about mood, not effort.
- Mere exposure effect is about liking something more with repeated exposure. No exposure - related context here.
- Chameleon effect is unconsciously mimicking others' behaviors or emotions. Lenny unconsciously mimicked his girlfriend's depressed mood.
- Bystander effect is about people being less likely to help in a group. Not related to mood change.
Answer:
the chameleon effect.