Perception of self- and externally-generated visual stimuli: Evidence from EEG and behaviour
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Description: Associated paper: https://doi.org/10.1111/psyp.14295 This repository releases data that were recorded for a project where we asked participants to judge the intensity of auditory and visual stimuli presented following active or passive button presses. The repository contains group level ERP and behavioural data. In separate blocks, participants either pressed a button (active condition), or the button pulled the finger down by means of an electromagnet (passive condition). In each trial, the button press triggered a stimulus, followed by a second stimulus after a 500-1250ms delay. In auditory conditions, the stimuli were 1000Hz tones, while in visual conditions they were 250-pixel grey discs. Participants were asked to judge which of the stimuli was more intense. The first stimulus had a fixed intensity, while the second could have one of five different values. To assess behvavioural performance, we took the proportion of ‘second more intense’ answers and fitted psychometric functions to the data to derive the point of subjective equality (threshold) for each participant. ERPs were derived by time-locking to the button press.