Removal of Stroop interference was obtained after exposure to words eliciting positive affect. This effect was predicted by personality systems interactions (PSI) theory, which assumes that (a) an abstract (high-level) representation of a difficult intention is generated in intention memory under certain conditions (e.g., when an action plan contains more than 1 step); (b) positive affect releases the inhibition of the pathway between intention memory and its output system. Interference removal is interpreted in terms of volitional facilitation. This effect posits a challenge to current cognitive models of the Stroop effect. Compared with alternative explanations, PSI theory can explain the data in a broader context: Implications of volitional facilitation and volitional inhibition for the study of prospective memory, alienation, procrastination, and rumination in depression are discussed.
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