The impact of socially projected group composition on behavior in a commons dilemma: A self-attention perspective

Socially projected group compositions, based on subjects’ expectancies about the behavior of others and the number of subjects taking part on the resource use task, were indexed using Mullen’s Additive Other-Total Ratio (Mullen, 1987) and used to predict harvesting behavior in a commons dilemma. One-hundred forty-three males took part in a resource use task in groups ranging in size from two to six members. Just prior to harvesting trials, subjects indicated the number of those taking part that they expected to overharvest and to underharvest, and indicated to which of these groups they had assigned themselves. Results indicated that harvesting behavior varied as a function of the number of others expected to behave differently from self, and conformed to patterns predicted by Self-Attention Theory. With increases in the number of others expected to underharvest, indexing an increase in self-attention, subjects who indicated they would overharvest become more conservative in resource use. However, subjects who indicated they would underharvest did not significantly decrease harvest size with increases in the number of others expected to overharvest. These subjects were already harvesting at an optimal or sub-optimal rate, and therefore had no need to reduce the size of their harvests to match their behavior to standards stressing conservatism in resource use.