Attentional bias modification
ABM
In the ABM task, pictures appeared on the screen one after another at random locations on a grid. When a green cue was presented around the picture, accompanied by a bell sound, the participants had to click on the item before its offset occurred. If the participant responded between the cue onset and the item offset, a positive green feedback (the points obtained) was displayed with a rewarding sound. If they responded to a cued picture after the item’s offset, a negative orange (‘too late’) feedback was shown. If they did not respond to a cued picture or responded to a non-cued item, a negative red cross appeared as feedback. In the case of correct response withholding, a dark grey-green feedback was displayed with a neutral non-ascending sound, and a third of the hit point was awarded to avoid creating attentional bias during NoGo trials (Fig. Schematic ABM task timeline, depicting the sequence of stimuli and response window.