Three experiments investigated how activation of knowledge about situational forces affects discounting in dispositional inference tasks. Each experiment varied a different knowledge activation factor -salience, accessibility, or specificity of situational information. In addition, all 3 experiments varied situational demands and cognitive load. The results showed that cognitive load eliminated discounting when situational information was low in salience, accessibility, or specificity. However, when situational information was more salient, accessible, or specific, it produced strong discounting effects even when perceivers were under cognitive load. These results are discussed in terms of correction and integration models of dispositional inferences from behavior.