Additional file 2: Table S2.

Results of online surveys to define ‘neutral’ behaviours. 80 men and 91 women aged 18–30 were asked whether each activity would affect how attractive they found a member of the opposite sex using a five-point Likert scale ranging from −2 to +2, where 0 indicated “no effect on attractiveness.” We retained traits which did not produce significant skew in responses (alpha=0.01) and these are listed below.

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Moore et al. BMC Evolutionary Biology 2013 13:182   doi:10.1186/1471-2148-13-182