The answer is "facial feedback" effect.
The <span>facial feedback effect theory explains that when someone imitates some facial expressions it actually affect his or her emotional response, for example if during an even one person who is not enjoying the event is forced to smile and laugh, eventually he will find the even more joyful and might start enjoying the event.</span>
Answer:
This study was an experiment.
Explanation:
An experiment demonstrated to compare the behavior of the two groups, the one who watched the violent film and the the one who did not. the research was made to figure out the impact of violence in human development.