An experiment was conducted to investigate the effects of self-harvest
and resource management outcome on self-other attributions in a simul
ated commons dilemma. In groups of five or six, participants (n = 171)
managed a limited, shared, self-regenerating resource. Self-attributi
ons to ignorance, concern for others, fear, and greed were compared to
the same attributions made for cooperative and noncooperative others.
The attributions were made in two contexts: efficient management and
rapid resource depletion. As predicted, self-attributions resembled th
ose made for similar others; heavy harvesters made similar attribution
s for themselves and noncooperative others, and light harvesters made
similar attributions for themselves and the cooperative others. A self
-serving bias was evident, especially among heavy harvesters. Attribut
ions were also influenced by the context in which they were made; stro
nger attributions to ignorance, fear, and greed, and weaker attributio
ns to concern for others were made when the resource pool was rapidly
depleted than when it was managed efficiently.