Research on positive illusions has tended to rely on cognitive explanations for why people reach self-serving judgments. The current studies suggest that affect can also influence the judgments people make. In two experiments, participants judged fewer neutral definition statements to be true after negative affective image primes than after positive or neutral affective image primes. In another experiment, participants primed with positive images judged obviously true statements to be true more quickly than they judged obviously false statements to be false, but participants primed with negative images showed a reversed pattern of latencies. They judged obviously false statements to be false more quickly than they judged true statements to be true. Finally, in an experiment using an Implicit Association Test procedure (Greenwald, McGhee, & Schwarz, 1998), participants demonstrated a strong relationship between valence (i.e., positive vs. negative) and validity (i.e., true vs. false). Overall, the interpretation offered for these results is that people associate valence with validity, so when they experience positive or negative affect, they are primed to judge information to be true or false, respectively, more often and more quickly.