Phenomenology of the sound-induced flash illusion.

Past studies, using pairings of auditory tones and visual flashes, which were static and coincident in space but variable in time, demonstrated errors in judging the temporal patterning of the visual flashes-the sound-induced flash illusion. These errors took one of the two forms: under-reporting (sound-induced fusion) or over-reporting (sound-induced fission) of the flash numbers. Our study had three objectives: to examine the robustness of both illusions and to consider the effects of stimulus set and response bias.

Awareness and filling-in of the human blind spot: linking psychophysics with retinal topography.

Purpose: To link psychophysical thresholds for blind spot awareness and filling-in with early neural components that underpin these perceptions.

Methods: Blind spot dimensions were quantified, after which an intrinsic stimulus (i.e.

High-resolution ERP mapping of cortical activation related to implicit object-location memory.

High-density event-related potentials (ERPs) were recorded during an object recognition task which involved task-irrelevant changes in the location of studied objects. Participants categorised objects as studied or novel while data were analysed to ascertain the effect of the location changes on performance and waveform topography. Our results indicate that humans can classify objects faster and more accurately when using implicit spatial memory.