A multi-semester classroom demonstration yields evidence in support of the facial feedback effect.

The facial feedback effect refers to the influence of unobtrusive manipulations of facial behavior on emotional outcomes. That manipulations inducing or inhibiting smiling can shape positive affect and evaluations is a staple of undergraduate psychology curricula and supports theories of embodied emotion. Thus, the results of a Registered Replication Report indicating minimal evidence to support the facial feedback effect were widely viewed as cause for concern regarding the reliability of this effect. However, it has been suggested that features of the design of the replication studies may have influenced the study results. Relevant to these concerns are experimental facial feedback data collected from over 400 undergraduates over the course of 9 semesters. Circumstances of data collection met several criteria broadly recommended for testing the effect, including limited prior exposure to the facial feedback hypothesis, conditions minimally likely to induce self-focused attention, and the use of moderately funny contemporary cartoons as stimuli. Results yielded robust evidence in favor of the facial feedback hypothesis. Cartoons that participants evaluated while holding a pen or pencil in their teeth (smiling induction) were rated as funnier than cartoons they evaluated while holding a pen or pencil in their lips (smiling inhibition). The magnitude of the effect overlapped with original reports. Findings demonstrate that the facial feedback effect can be successfully replicated in a classroom setting and are in line with theories of emotional embodiment, according to which internal emotional states and relevant external emotional behaviors exert mutual influence on one another. (PsycINFO Database Record (c) 2019 APA, all rights reserved).