Aprofessor conducts an experiment in which she asks her students to either hold a pen between their teeth or between their lips. holding the pen between one's teeth mimicked the facial expression of smiling. after five minutes, she finds out that the students who held the pen beneath their teeth reported being happier than those who held it between their lips. these results most likely supports the .

Facial feedback hypothesis

Explanation:

The facial feedback hypothesis states that facial movements can influence emotional experiences. In other words, making a particular face (such as smiling) can help you experience the related emotion (being happy). This is the case in the example. In this example, some students were making a face that resembled that of smiling. This led them to be happier than those who were not making the same face.

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the telephone is the answer