Enhanced dimension-specific visual working memory in grapheme-color synesthesia.
Bottom Line: Synesthetes displayed superior color working memory than controls for both grapheme types, whereas the two groups did not differ in grapheme working memory.Further analyses excluded the possibilities of enhanced working memory among synesthetes being due to greater color discrimination, stimulus color familiarity, or bidirectionality.These results reveal enhanced dimension-specific visual working memory in this population and supply further evidence for a close relationship between sensory processing and the maintenance of sensory information in working memory.
Affiliation: Department of Experimental Psychology, University of Oxford, UK. email@example.comShow MeSH
Related in: MedlinePlus
Mentions: As predicted by the enhanced processing hypothesis, there was a main effect of Group,F(1, 30) = 6.78, MSE = 0.06, p = .014, (95% CIs: .01, .40), with synesthetes displaying lower ERs than controls (see Fig. 2A). An inspection of the descriptive statistics in Table 1 suggests that this effect may be driven by especially high error rates for 3-back targets in controls, but importantly there were no Group interactions involving Load or Type, Fs < 1, and no other main effects or interactions, Fs < 3.8. The main effect of Group was replicated when Color discrimination was included as a covariate, F(1, 29) = 4.73, MSE = 0.05, p = .038, , with Color discrimination exerting a suggestive independent effect, F(1, 29) = 3.76, MSE = 0.05, p = .062, , reflecting a positive correlation between color discrimination values and ERs in the n-back task, r = .40, p = .023, rp = .34 (controlling for group).
Affiliation: Department of Experimental Psychology, University of Oxford, UK. firstname.lastname@example.org