Time reproduction of structured auditory events by deaf and hearing subjects
Congenital deafness affects different aspects of information processing and time perception. In deafness the accuracy of duration judgments seems to be linked to differences in the use of conventional time units, applied strategy as well as cognitive processes such as attention or working memory (Kowalska & Szelag, 2006). The present experiment investigated the effect of different event structures on duration reproduction in deaf and normal hearing subjects. The accuracy and variability of performances were calculated respectively by means of the absolute error score and coefficient of variation of time reproductions. Results showed a global underestimation of durations for all subjects; moreover all subjects performed more accurate reproductions for regular than for irregular patterns. No differences in reproduction accuracy between deaf and normal hearing subjects were found, even if reproductions in the deaf subjects showed a greater variability. Accuracy of time reproductions was improved when subject used a single strategy rather than more. Results confirm previous findings about the underestimation of time for deaf and normally hearing subjects, while a more predictable temporal structure of patterns seems to improve accuracy of time reproductions. Deafness affects time reproductions, even if, by means of the interdependence of sensorial systems (see Tharpe, Ashmead, & Rothpletz, 2002) auditory deficits seem to be compensated by other systems. A different strategy seems to be used by normal and deaf subjects probably due to differences in attention deployment and entrainment. ...
ConferenceESCOM 2009 : 7th Triennial Conference of European Society for the Cognitive Sciences of Music
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- ESCOM 2009 
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