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Description: This OSF repository contains data and analysis scripts for the study titled Divergent effects of absolute evidence magnitude on decision accuracy and confidence in perceptual judgements. It contains code + data for a study investigating the influence of different types of sensory evidence (relative and absolute) on accuracy, response times, confidence judgments and one's propensity to make a change-of-mind decision. This repository can be accessed online at: https://osf.io/r8vfx/ . In this study, we presented participants with sets of two squares (to the left and right of a fixation point) that dynamically changed in luminance over time. Participants were required to judge which square was brighter on average, and then subsequently report their confidence in their decision using a rating scale (ranging from 1 = surely incorrect, to 4 = unsure if correct or incorrect, to 7 = surely correct). Across two experiments, we manipulated levels of relative evidence (i.e. the difference in average luminance between the two squares) and absolute evidence (i.e. the summed luminance across the two squares). In Experiment 2 we additionally varied the extent of variability in the luminance of the two squares over time. For more details about the experiment design and analysis methods, please see the corresponding preprint: Ko, Y. H., Feuerriegel, D., Turner, W., Overhoff, H., Niessen, E., Stahl, J., ... & Bode, S. (2021). Divergent effects of absolute evidence magnitude on decision accuracy and confidence in perceptual judgements. bioRxiv. You can find the preprint online at: https://doi.org/10.1101/2021.07.04.451079 Authors: Yiu Hong Ko, Daniel Feuerriegel, William Turner, Helen Overhoff, Eva Niessen, Jutta Stahl, Robert Hester, Gereon R. Fink, Peter H. Weiss, & Stefan Bode This repository was prepared by Yiu Hong Ko with some assistance from Daniel Feuerriegel.