Supplementary material from "An auditory illusion reveals the role of streaming in the temporal misallocation of perceptual objects"

The same sequence is presented to each ear, but in opposite phase, such that the left and right ears receive a High–Low–High … and a Low–High–Low … pattern, respectively.

Listeners generally report hearing the illusion of an alternating pattern of low and high tones, with all the low tones lateralized to one side and all the high tones lateralized to the other side. The current explanation of the illusion is that it reflects an illusory feature conjunction of pitch and perceived location. Using psychophysics and electroencephalogram measures, we test this and an alternative hypotheses involving synchronous and sequential stream segregation, and investigated potential neural correlates of the illusion.