Self-affirmation seems to enable an individual to objectively evaluate information that would otherwise evoke a defensive reaction. If this objectivity reflects freedom from self-evaluative concerns, affirmation should sensitize people to central cues of a persuasive message, like argument strength. If affirmation simply induces agreeableness or trivializes the issue, affirmed participants should not particularly heed argument strength. Affirmed and non-affirmed participants rated the persuasiveness of pro- and counterattitudinal arguments that varied in strength. Among participants who rated their attitudes as personally important, self-affirmation decreased bias and increased sensitivity to argument strength, as predicted by self-affirmation theory. (C) 2003 Elsevier Inc. All rights reserved.