Meta-analytic evidence for the non-modularity of pitch processing in congenital amusia

摘要: A major theme driving research in congenital amusia is related to the modularity of this musical disorder, with two possible sources amusic pitch perception deficit. The first possibility that deficit due a broad disorder acoustic processing has effect disrupting downstream processing, and second specific module. To interrogate these hypotheses, we performed meta-analysis on types sizes contained within 42 studies literature: performance gap between amusics controls tasks discrimination, broadly defined, correlation specifically perception. augment database, also calculated using data from 106 participants tested by our own group. We found strong evidence for account amusia. magnitude was moderated size change, but not whether stimuli were composed tones or speech. Furthermore, there significant an individual's However, individual cases show double dissociation which suggests although most are probably explainable deficit, heterogeneity disorder. Finally, tonal language fluency does influence controls, no fare worse direction than discrimination tasks. These results constitute quantitative review current literature amusia, suggest several new directions research, including experimental induction behaviour through transcranial magnetic stimulation (TMS) systematic exploration developmental trajectory