Fig. 2: Experimentally controlled stimulus expectations shift detection thresholds in stable and volatile probability environments.
From: Pre-stimulus beta power mediates explicit and implicit perceptual biases in distinct cortical areas
A Signal detection theoretic analysis stable environment (A, n = 43 participants) and volatile environment (B, n = 39 participants). Participants had a higher hit rate (i) as well as a higher false alarm rate (ii) in the high expectation condition, with no significant difference in Dprime (iii). The criterion c was significantly more conservative in the high-probability condition (iv). The mean of high confidence ratings in correct trials was higher in trials in which the response matched the participants’ expectations (congruent trials) (v). Supplementary Fig. 1.1–1.4. Box plots depict median and interquartile range, while whiskers show minimum and maximum values. Significance: ***p < .001, **p < .01, *p < .05. ns not significant.
