People often disagree in their judgments of the traits and the abiliti
es of others. Three studies suggested that these differences arise bec
ause people activate and use their own particular behaviors as norms w
hen evaluating the performances of others. In Study 1, 71% of particip
ants reported comparing a target's behavior with their own behavior wh
en providing judgments of that target. Participants also provided desc
riptions of their own behavior more quickly after judging another pers
on's behavior, suggesting they had activated information about their o
wn behavior when judging that of another (Studies 2 and 3). In all 3 s
tudies, judgments of another's behavior tended to be egocentrically re
lated to the participants' own behavior, particularly among those who
displayed the strongest evidence of activation of self-information (St
udies 1 and 2). Discussion centers on the generality of these findings
and their implications for past and future research.