When bad isn't all bad: Strategic use of sample information in generalization and stereotyping.

The influence of the reliability and valence of sample information on generalization to in-group and out-group target populations was investigated in 2 studies. In both studies the valence of the information was either favorable (i.e., a positive in-group sample and a negative out-group sample) or unfavorable. The reliability of sample information was manipulated in terms of sample variability (Study 1) and sample size (Study 2). In both studies the perceived central tendency of favorable sample information was directly generalized, but unfavorable and unreliable sample information was not. Moreover, generalizations based on unfavorable and unreliable samples were characterized by enhanced variability estimates for both in-group and out-group populations, thereby undermining unfavorable group differences. These results are discussed in terms of strategic use of sample information in the formation of social stereotypes.