RESUMEN
The current study investigated the joint contribution of visual and auditory disfluencies, or distortions, to actual and predicted memory performance with naturalistic, multi-modal materials through three experiments. In Experiments 1 and 2, participants watched food recipe clips containing visual and auditory information that were either fully intact or else distorted in one or both of the two modalities. They were asked to remember these for a later memory test and made memory predictions after each clip. Participants produced lower memory predictions for distorted auditory and visual information than intact ones. However, these perceptual distortions revealed no actual memory differences across encoding conditions, expanding the metacognitive illusion of perceptual disfluency for static, single-word materials to naturalistic, dynamic, multi-modal materials. Experiment 3 provided naïve participants with a hypothetical scenario about the experimental paradigm used in Experiment 1, revealing lower memory predictions for distorted than intact information in both modalities. Theoretically, these results imply that both in-the-moment experiences and a priori beliefs may contribute to the perceptual disfluency illusion. From an applied perspective, the study suggests that when audio-visual distortions occur, individuals might use this information to predict their memory performance, even when it does not factor into actual memory performance.