The present study investigated how knowledge-gaps, measured by feeling-of-knowing, and individual differences in epistemic curiosity contribute to the arousal of state curiosity and exploratory behaviour for 265 (210 women, 55 men) university students. Participants read 12 general knowledge questions, reported the answer was either known (“I Know”), on the tip-of-the-tongue (“TOT”), or unknown (“Don't Know”), and indicated how curious they were to see each answer, after which they could view any answers they wanted. Participants also responded to the Epistemic Curiosity (...) (EC) and Curiosity as a Feeling-of-Deprivation (CFD) scales. “TOT” was associated with the smallest knowledge-gap, most curiosity and exploration, and feelings of uncertainty and tension as measured by the CFD scale. “Don't Know” corresponded with the largest knowledge-gap, less curiosity and exploration, and positive feelings of interest as measured by the EC scale. “I Know” states, which reflected the absence of a knowledge-gap, involved the least curiosity and exploration. (shrink)

Previous research suggests that curiosity is sometimes induced by novel information one has no relevant knowledge about, but it is sometimes induced by new information about something that one is familiar with and has prior knowledge about. However, the conditions under which novelty or familiarity triggers curiosity remain unclear. Using metacognitive confidence judgments as a proxy to quantify the amount of knowledge, this study evaluates the relationship between the amount of relevant knowledge and curiosity. We reviewed previous studies on the (...) relationship between subjective curiosity and confidence and reanalyzed existing large‐sample data. The findings indicate that the relationship between curiosity and confidence differs depending on the nature of the stimuli: epistemic versus perceptual. Regarding perceptual stimuli, curiosity is stronger when individuals have lower confidence levels. By contrast, for epistemic stimuli, curiosity is stronger when individuals have higher confidence levels. These results suggest that curiosity triggered by perceptual stimuli is based on perceived novelty, whereas that triggered by epistemic stimuli is based on familiarity with prior knowledge. (shrink)