Chimpanzees show a developmental increase in susceptibility to contagious yawning: a test of the effect of ontogeny and emotional closeness on yawn contagion.

PLoS One · 2013 · PMC3797813 · PMID 24146848

Europe PMC DOI

hedged sentences

0.0570

closest p · 1.1× alpha

0.1310

boldest claim

The sentences

approached significanceP = 0.057so close (0.05 < p ≤ 0.1)

Model behaviour only approached significance as an independent predictor ( F = 2.70, df = 3, P = 0.057), while model familiarity was non-significant ( F = 2.77, df = 1, P = 0.109).

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did not reach statistical significanceP = 0.131not close (p > 0.1)

Moreover, juveniles produced twice as many yawns in the yawn phase (n = 16, mean = 0.76±0.24) compared to the post-yawn phase (n = 8, mean 0.38±0.20), although the difference did not reach statistical significance (Wilcoxon test: n = 21, z = 1.64, P = 0.131).

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.