Feeling of guilt explains why people react differently to resource depletion warnings.

Paired t -tests indicated that, on average, a highly significant decrease could be observed, both for the first warning (mean round 5 = 6.31, SE = 0.37, mean round 6 = 4.78, SE = 0.39, paired t -test: t = 3.66, p < 0.001) and the second warning (mean round 16 = 6.96, SE = 0.34, mean round 17 = 5.14, SE = 0.42, paired t -test: t = 4.83, p < 0.001, see Fig. 1 a).

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