Mood and multiple source characteristics: mood congruency of source consensus status and source trustworthiness as determinants of message scrutiny.

This research deals with the interplay of mood and multiple source characteristics in regard to persuasion processes and attitudes. In a four-factorial experiment, mood (positive vs. negative), source consensus status (majority vs. minority), source trustworthiness (high vs. low), and message strength (strong vs. weak) were manipulated. Results were in line with predictions of a mood-congruent expectancies perspective rather than competing predictions of a mood-as-information perspective. Specifically, individuals in both moods evinced higher message scrutiny given mood-incongruent (vs. mood-congruent) source characteristics. That is, across source trustworthiness, positive (negative) mood led to higher message scrutiny given a minority (majority) versus a majority (minority) source. Furthermore, across source consensus, positive (negative) mood led to higher message scrutiny given an untrustworthy (trustworthy) versus a trustworthy (untrustworthy) source. Additional analyses revealed that processing effort increased from doubly mood-congruent source combinations (low effort) over mixed-source combinations (intermediate effort) to doubly mood-incongruent combinations (high effort). Implications are discussed.