The relationship between attitudes and behavior has been a topic of considerable debate. Accordingly, this paper reports a meta-analysis of 83 attitude-behavior studies. The analysis suggests that attitudes significantly predict future behavior (combined p<<.000000000001); the average attitude-behavior correlation (ABC) is r=.38. Methodologically, ABCs are higher for studies using: (1) self-report measures of behavior; (2) primarily non-students as subjects; or (3) attitude and behavior measures of corresponding levels of specificity. Substantively, ABCs tend to be higher when the attitude is formed by direct experience, the attitude is held with certainty, the subject is a low self-monitor, or the situation increases self-focused attention. The limitations and future directions of attitude-behavior research are discussed. (Author/TE)