Next, an ostensibly unrelated product evaluation study served as a cover story for the hand-washing manipulation. Participants evaluated organic soap. Half were told to wash their hands with the soap. The other half were told not to use the soap.
Finally, participants did a second round of gambling. They received HK$50 and were told they could bet any amount from nothing to HK$50.It was the same game as last time, but with only one round.
Researchers found participants who had good luck in the initial round bet more money in the second round than participants who had bad luck.
However, participants who had bad luck in the first round bet more money in the second round if they washed their hands. The difference was an average of HK$31.15 versus HK$17.47.
In contrast, those who had good luck in the first round bet less money in the second round if they had washed their hands. The difference was an average of HK$28.08 versus HK$37.75.
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