Metacognition is defined as the capacity to evaluate one’s own cognitive processes in various domains. Its relation with dysfunctional personality traits is still unknown, although it has been suggested that some personality disorders have difficulties knowing their own mental states. This relation has only been recently studied on an experimental level. Nevertheless, these studies have only used biased measures of metacognition. The present research aims at contributing to the study of the relationship between metacognition and dysfunctional personality traits. We ran an online perceptual decision making task with neurotypical adults along with the Personality Inventory for DSM-5 (PID-5). The preliminary results obtained are discussed, which will provide valuable information about the relationship between metacognition and dysfunctional personality traits.