title: Behavioral and electrophysiologic evidence of auditory processing disorder: a twin study.
abstract: We administered a battery of both behavioral and electrophysiologic measures to a pair of fraternal twin girls, one of whom exhibited symptoms consistent with an auditory processing disorder. Both twins were within normal limits on standardized tests of cognitive and language skills. Basic audiometric measures, as well as behavioral tests of simultaneous masking, backward masking, gap detection, and frequency-sweep discrimination, showed little difference between the twins. Significant differences, however, were evident on event-related potentials (ERPs) in response to both within-channel and across-channel gap detection tasks. Substantial differences were also noted for ERPs to both linguistic and nonlinguistic targets in dichotic listening paradigms. The pattern of electrophysiologic results was consistent with a deficit in the efficiency of interhemispheric transfer of auditory information. A possible reason for the greater effectiveness of electrophysiologic over behavioral measures is discussed.
authors.affiliation: Program in Cognition and Neuroscience, The University of Texas at Dallas, USA.
authors.forename: James
authors.initials: J
authors.lastname: Jerger
authors.forename: Linda
authors.initials: L
authors.lastname: Thibodeau
authors.forename: Jeffrey
authors.initials: J
authors.lastname: Martin
authors.forename: Jyutika
authors.initials: J
authors.lastname: Mehta
authors.forename: Gail
authors.initials: G
authors.lastname: Tillman
authors.forename: Ralf
authors.initials: R
authors.lastname: Greenwald
authors.forename: Lana
authors.initials: L
authors.lastname: Britt
authors.forename: Jack
authors.initials: J
authors.lastname: Scott
authors.forename: Gary
authors.initials: G
authors.lastname: Overson
mesh_terms: D001299:Audiometry / Q000379:methods; D001308:Auditory Perceptual Disorders / Q000150:complications* / Q000175:diagnosis; D001309:Auditory Threshold / Q000502:physiology; D002648:Child; D004007:Dichotic Listening Tests; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D006801:Humans; D010470:Perceptual Masking / Q000502:physiology; D013067:Speech Perception / Q000502:physiology; D013997:Time Factors