Fig 1. Stimulation cycle for the hybrid condition for the first and second experiment.

The stimulation cycle starts with a cue presentation (for 2s), indicating to the participant the target item, followed by a 1s pause during which the cue disappeared and all icons remained gray. A background rectangle then starts to flicker and the oddball stimulation begins 500ms later. The oddball stimulation consists of 10 flashing sequences during which each of the 6 icons is flashed one after another in random order for a duration randomly set between 200 and 300ms.