Just Playing the Role of Good Study Participants? Evaluative Conditioning, Demand Compliance, and Agreeableness

Evaluative Conditioning (EC) is the change in liking of stimuli due to their co-occurrence with other valenced stimuli. Recent research has shown stronger EC effects for more agreeable individuals. Because EC procedures are prone to demand characteristics, we hypothesized that more agreeable individuals might simply play the role of good study participants and therefore show stronger EC effects. We tested this in two preregistered experiments ( N = 700). In Experiment 1, self-reported Agreeableness and a behavioral measure of Demand Compliance moderated EC. However, Agreeableness and Demand Compliance were uncorrelated, and the moderations were independent. Experiment 2 used an instructional EC paradigm, showing only a moderation by Demand Compliance but not Agreeableness. Our studies imply that although EC effects are related to Demand Compliance, more agreeable participants are not more likely to comply with demand characteristics in EC experiments.