This article examines the matchup hypothesis or the notion that the congruence in advertisements between spokesperson characteristics and product attributes is related to observed variations in source credibility, product evaluations, perceived product gender, and other measures of advertising and communication effectiveness. Schema theory is used to interpret the results of previous inquiries into the matchup hypothesis, and the results of two experiments that provide additional insight into how schema might be changed by a spokesperson/product match are reported. Areas of future research into the matchup hypothesis on schema theory implications are discussed. 0 1994 John Wiley & Sons, Inc.