The main objective of the study was to check for the existence of the effect of shortterm exposure to fi ction in the area of mentalization abilities (Kidd, Castano, 2013), taking into account the spontaneous versus explicit aspect of these abilities. An additional aim was to verify the hypothesis that at the root of this phenomenon lies the process of imaginary simulation. In the fi rst part of the study, participants (N = 103, aged 18 to 25) were randomly assigned to one of four groups: (1) reading literary fi ction, (2) listening to the same story as the fi rst group, and at the same time imagining the events presented in it, (3) reading popular fi ction, and (4) not reading any story. In the second part of the study, all participants completed mentalization tests, a test checking familiarity with fi ction, and the questionnaire on practices of reading books, magazines and watching television. The study showed no signifi cant differences between the groups in the results of mentalization tests, even under conditions conducive to imaginary simulation. Familiarity with fi ction proved to be a positive predictor of spontaneous mentalization, and exposure to television was a negative predictor of explicit mentalization. The fi ndings lead to the conclusion that short-term exposure to fi ction does not lead to a signifi cant increase in spontaneous or explicit mentalization. However, both aspects of mentalization are connected with more long-term factors that are expressed in familiarity with fi ction and exposure to television.