Harmon-Jones, E., & Allen, J. J. (2001). The role of affect in the mere exposure effect: Evidence from psychophysiological and individual differences approaches. Personality and Social Psychology Bulletin, 27(7), 889-898.

Authors present affective models of the mere exposure effect: repeated exposure to an object enhances the positive affect or decreases the negative affect toward the object. Researchers report that repeatedly exposing persons to nonreinforced objects boosts their positive affective reactions to those objects.