Fig. 1: Calibration block.
From: Intentional binding effect depends on conscious access to the sensory consequences of action
a In continuous flash suppression (CFS), high-contrast masks consisting of many squares varying in red pixel values were presented at 10 Hz to one eye, after which a single, static mask was displayed for 100 ms to reduce visual aftereffects. During CFS, a low-contrast blue circle was presented to the opposite eye, with the intent that it would be suppressed from awareness when the visual system resolves the conflict between eyes. b, c During the calibration block, subjects reported which side of the CFS mask they thought the blue circle was presented on each trial. A Bayesian posterior was calculated for the stimulus contrast at which their discrimination accuracy is 52.5%, and the contrast for the next trial was drawn from the upper part of the posterior as in the example run illustrated here. At the end of the block, the 5th percentile of this posterior was used as the stimulus contrast for the remainder of the experiment, ensuring that subjects were aware of the stimulus on sufficiently few trials. The calibration curves shown here are from a single pilot subject.
