When stereotype knowledge prevents retrieval-induced forgetting

In the present study, we examined the effects of stereotypes and the typicality of traits in retrieval-induced forgetting (RIF). The participants in the experiment practiced half of the high-typicality, low-typicality or control traits associated with the name of a stereotype (athlete, scientist) or with the name of a person (Mikel, Jon). With the person name the high-typicality, low-typicality or control traits produced no evidence of stereotype activation. The traits were processed as independent features and generated RIF both immediately and at a one-week interval. Stereotype activation during encoding facilitated the integration of high-typicality traits, avoiding RIF in immediate and one-week recall. Moreover, both high-typicality and low-typicality traits benefited from stereotypes in one-week recognition. These findings show that previous knowledge contributes to integrate stereotypic traits that would otherwise compete for retrieval, thus producing RIF. (C) 2009 Elsevier B.V. All rights reserved.