Monozygotic twins' colour-number association: a case study.
A case study of a pair of monozygotic twins, both of whom show a strong and enduring colour-number association, is reported. The origin of the colours, in a jigsaw puzzle, is known. Neither reports conscious photisms typical of synaesthesia, but a Stroop task of naming the colours of digits shows an interference effect with incongruent colours.
Hancock
Peter
P
Department of Psychology, University of Stirling, Stirling, UK. pjbh1@stir.ac.uk