Date of Degree
cognition, perception, color, metacognition, 2AFC, detection
Confidence measures are sometimes used to index awareness below a participant’s criterion for what counts as being subjectively aware of a stimulus or stimulus property. If confidence ratings index awareness below subjective thresholds, then one might be tempted to use confidence ratings in place of subjective reports of whether a stimulus/stimulus property was “seen” or “unseen”. As such, a dissociation of confidence from performance may be construed as a dissociation of subjective awareness from objective task performance. This methodology has been used as supporting evidence for blindsight in typical observers (Balsdon and Azzopardi 2015; Peters and Lau 2015; Peters et al. 2017; Knotts et al., 2018). To further examine whether confidence can be used to reliably index a dissociation of awareness from objective performance, we conducted a web-based experiment using a 2AFC task to evaluate discrimination sensitivity for shape-majority decisions (a fixed ratio of two groups of shapes) under the independent variable: differentially colored shape ratios where either shape may be colored differently. Using a near-threshold color difference, we created conditions to render the color manipulation subjectively unaware. We found that confidence reports did not co-vary with performance on the primary task for participants who experienced performance increases with near-threshold color differences. Further research is necessary to support these findings.
Caruso, Trevor, "The Effects of Near-Threshold Color Manipulation on Perceptual Decision-Making and Confidence Report" (2022). CUNY Academic Works.