Tella really enjoys singing and she starts college as a music major. The more she enjoys singing, the more she worries about the pressure to win the first prize on contests. Now she finds that singing feels like a chore and something she has to do rather than wants to do. According to social psychology, Stella’s change in her views about singing is due to ___.

overjustification

Explanation:

Overjustification: In social psychology, the term "overjustification" is described as a phenomenon in which an individual's play activities becomes a work in order to get rewards or payment. In other words, it is considered as a process through which an individual's intrinsic interest related to a few activities or behaviors is being replaced via the presentation of some "external reward".

In the question above, Stella’s change in her views about singing is due to overjustification.