Personality judgment at zero acquaintance: agreement, assumed similarity, and implicit simplicity

Previously unacquainted participants (N = 218) were assessed in small-group sessions in which they rated themselves and each other on (a) the Big Five (e.g., Costa & McCrae, 1992) and (b) an instrument assessing various traits not traditionally measured in the Big Five taxonomy as well as sociopolitical attitudes. Replicating earlier research, we obtained a significant self-stranger correlation on Extraversion; in addition, we found significant agreement on ratings of thriftiness, athleticism, traditionalism, conservatism, and attractiveness. Assumed similarity correlations were substantial for Neuroticism, Agreeableness, and Conscientiousness; furthermore, consistent with previous findings, there was a strong inverse relation between agreement and assumed similarity across the assessed characteristics. Finally, the correlations between Neuroticism, Openness, Agreeableness, and Conscientiousness were significantly greater in the strangers' ratings than in the self-ratings, indicating that these peer judgments are less complex. We also compared our Big Five findings with those from previous samples of varying acquaintanceship; these analyses indicated that the strangers' ratings were characterized by lower levels of self-other agreement (for all traits except Extraversion) and somewhat higher levels of assumed similarity (for ratings of Neuroticism and Agreeableness).