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. 2018 Jan 18;8:1131. doi: 10.1038/s41598-018-19144-0

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Overview of behavioural results. (a) Mean accuracy in the Gabor patch orientation discrimination task was around 75%; it did not differ between Conditions in Experiment 2 and was similar in Experiment 1. (b) Mean visibility was around 2 (VE, vague experience); it did not differ between conditions in Experiment 2 and was similar in Experiment 1. (c) The results of logistic mixed regression analysis revealed that in both experiments (upper panel: Experiment 1, lower panel: Experiment 2) PAS ratings predicted Gabor patch orientation discrimination accuracy at each Presentation time (columns). However, in Experiment 2, there was no significant difference between real and fake Conditions in metacognitive accuracy (lower panel). PAS predicted accuracy the same way for both Conditions (the slopes do not differ significantly). In (a and b) the error bars represent standard deviation. In (c) X-axis values correspond with the following PAS ratings: 0 - No experience, 1 - Vague experience, 2 - Almost clear experience, and 3 - Clear experience.