Figure 2
From: The cross-modal double flash illusion depends on featural similarity between cross-modal inducers
(A–C) Bar plots depicting the mean number of reported flashes in Experiment 1 and 2 for six participants.
(A) Data from Experiment 1 where a Tactile/Auditory Noise stimulus combination was used. (B–C) Data from Experiment 2 where Pure-tone/Auditory Noise and 300 Hz/3500 Hz Tone combinations were used. In all cases there could be either one or two visual flashes that could be accompanied by one or two cross-modal events. When two cross-modal events were presented, they could be either the same (e.g. both auditory or both tactile) or different signals (e.g. tactile synchronous with first visual flash and auditory noise synchronous with second or vice versa). For each stimulus combination the data outlined in the broken red line indicates the condition under which the DFI is typically obtained. Regardless of stimulus combination, a strong DFI was found when the two cross-modal events were the same, though was abolished when they were different. Error bars indicate +/− standard error of the mean.
