Famous psychology study ‘killed by replication’: does a pencil in your mouth make you feel happy?

From experience to meaning...

Replication is very important in science, but sometimes the results can hurt. Hurt a lot. Yesterday I found this new replication meta-study on a very famous insight in psychology via this tweet by Stuart Ritchie:

The study he discusses is the 1988 study by Strack, Martin & Strepper:

We investigated the hypothesis that people’s facial activity influences their affective responses. Two studies were designed to both eliminate methodological problems of earlier experiments and clarify theoretical ambiguities. This was achieved by having subjects hold a pen in their mouth in ways that either inhibited or facilitated the muscles typically associated with smiling without requiring subjects to pose in a smiling face. Study 1’s results demonstrated the effectiveness of the procedure…

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