Synaesthetic photisms guide attention.
We evaluated whether synaesthetic colour experiences (i.e., photisms) guide or attract attention. An alphanumeric-colour synaesthete, J, and seven non-synaesthetes searched for target digits presented against backgrounds that were either congruent or incongruent with the colours of J's photisms for the target digits. For J, the slope of the search function for detecting the target digits on incongruent trials was shallower than the slope of the search function for detecting the target digits on congruent trials. In contrast, for the seven non-synaesthetes, the slopes of the search functions for detecting the target digits on congruent and incongruent trials were equivalent. These findings suggest that synaesthetic colour experiences influence the efficiency of visual search by guiding or attracting attention.
Smilek
Daniel
D
Department of Psychology, University of Waterloo, Ont., N2L 3G1, Waterloo, Canada. dsmilek@watarts.uwaterloo.ca
Dixon
Mike J
MJ
Merikle
Philip M
PM
D001288:Attention; D003117:Color Vision Defects / Q000175:diagnosis*; D006801:Humans; D010775:Photic Stimulation / Q000379:methods; D011930:Reaction Time