Group attribution error
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The group attribution error is a group-serving, attributional bias identical to the fundamental attribution error except that it occurs between different groups rather than different individuals.
Group members are more likely to attribute the decisions of their own group to its decision rules, while they tend to attribute the decisions of another group to its members' attitude.
The group attribution error was first reported by Scott Allison and David Messick.
Compare to the outgroup homogeneity bias.
