The perception and mimicry of facial movements predict judgments of smile authenticity.

PLoS One · 2014 · PMC4053432 · PMID 24918939

Europe PMC DOI

hedged sentences

0.0530

closest p · 1.1× alpha

0.0950

boldest claim

The sentences

fell short of significancep = .053so close (0.05 < p ≤ 0.1)

Results were similar when male participants were excluded from the analyses, with a few exceptions: For the Orbicularis Oculi a main effect of AU12 just fell short of significance ( F (1,19) = 4.27, p = .053, η p 2 = .18), with higher EMG to stimuli containing more of AU12.

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marginally significantp = .095so close (0.05 < p ≤ 0.1)

For the Orbicularis Oculi muscle we found a significant effect of Time ( F (1,30) = 24.378, p <.001, η p 2 = .45) due to higher EMG activation in the second time window; a trend-like main effect of AU25&26 ( F (2,60) = 2.65, p = .079, η p 2 = .08), and two marginally significant interactions for AU12 X AU6 X AU25&26 (F(4,120) = 2.03, p = .095, η p 2 = .06), and AU12 X Time ( F (1,30) = 3.39, p = .075, η p 2 = .1).

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a strong trendno p-value reported

AU6 and AU12, respectively), and the Corrugator showed a strong trend for the same type of response specificity, with greater frowning in response to stimuli containing frowning.

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