Fig 6. Stimulus properties affect positive and negative learning bias and choices during the training phase (experiment 3: large international sample of participants, web-based study).

Left: replicating the results of experiment 1a and 1b, subjects in version 1 of the PST were better at choosing A during test phase whereas subjects in task version 2 were better at avoiding stimulus B. Right: replicating the results of experiment 1a and 1b, test phase bias was accompanied by group differences during training. In task version 1 participants performed better on the AB pair relative to the CD pair, whereas the opposite pattern was observed for task version 2. There were no significant interactions with the time to respond (1000 ms or 4000 ms). Data is therefore collapsed across both time windows. Error bars represent ± 1 SE.