Consistency just feels right: Procedural fluency increases confidence in performance.

Incidental features of a stimulus can increase how easily it is processed, which can then increase confidence in task performance. Here, we examine the impact of fluency stemming from procedural features embedded in a task rather than in the features of a stimulus. We propose that manipulating the consistency of procedural features over a series of stimuli can produce procedural fluency, a metacognitive sense of ease in processing that can inflate confidence without boosting accuracy. That is, even superficial consistency within a task can lead people to inaccurately believe they are performing better. As with fluency derived from features of individual stimuli, drawing attention to procedural consistency leads people to discount it, attenuating its impact on confidence. Further, the influence of procedural fluency on confidence relies on individuals' naïve theories about what fluency signals about their performance. Accordingly, manipulating these naïve theories mitigates the effects of procedural fluency on confidence. (PsycInfo Database Record (c) 2020 APA, all rights reserved).