The experimental paradigm (an example of the “faces relevant” condition): Relevant stimuli are marked by vertical bars; irrelevant stimuli are marked by horizontal bars. Stimuli were presented for 1000 ms. A grey fixation cross was shown for 1,750 ms to 2,750 ms in between stimuli. Participants were supposed to indicate when a task relevant picture was repeated 1-back while ignoring the interspersed task irrelevant distractors.
Biehl et al. BMC Neuroscience 2013 14:107 doi:10.1186/1471-2202-14-107