As predicted, participants in the clean-scented rooms returned significantly more money than those in the baseline condition, t(26) = 2.64, p = .01, d = 1.03 (see Table 1). The clean-scented room led participants to resist exploitation and reciprocate the trusting behaviour of the sender.
Source: “The Smell of Virtue, Clean Scents Promote Reciprocity and Charity” from Psychological Science
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