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Matthies, Melanie Lynne 2014-12-16T00:59:13Z 2014-12-16T00:59:13Z 10000-01-01 1984 1984 Frequency-discrimination data were obtained for 12 normal-hearing and six hearing-impaired subjects with a 3-interval, 2-cued, yes/no task for a variety of signals. These signals included pure tones, fixed-bandwidth (400 Hz) narrow-band noise and ratio-bandwidth (20%) narrow-band noise. Analyses included response factors in frequency discrimination, comparison of the data from the normal-hearing subjects with published data, relation of the pure-tone and narrow-band noise tasks and performance of the hearing-impaired subjects. Response factors included criterion as measured by the Beta statistic, sequential effects as described by auto-correlation calculations and learning effects as summarized by the number of practice blocks to stable and asymptotic performance. A wide range of frequency-discrimination results was demonstrated by the normal-hearing subjects and this range appeared to be unrelated to response factor or to threshold as measured by an adaptive 21FC procedure. The results from the hearing-impaired subjects overlapped those of the normal-hearing subjects in a number of cases and the response factors (learning, sequential effects and response criterion) were found to be very similar for both subject groups. With the hearing-impaired subjects, the relation between magnitude of hearing loss and difference limen was strongest for the 5000-Hz signals and weakest for the 500-Hz signals. A prediction equation was derived from multiple-regression analysis which accounted for approximately 91% of the variance in frequency-discrimination performance across the 18 subjects with three factors (frequency, sensation level, and signal bandwidth) and a constant. Hearing loss affected the comparisons between pure-tone and narrow-band noise difference limina by making the differences between these smaller than would be expected from the data of the normal-hearing subjects. Made available in DSpace on 2014-12-16T00:59:13Z (GMT). No. of bitstreams: 1 8502238.pdf: 3657389 bytes, checksum: 4168e78d99a0b70c286595b8b98db026 (MD5) Previous issue date: 1984 Embargo set by: Seth Robbins for item 70844 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 113 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1984. http://hdl.handle.net/2142/70678 (UMI)AAI8502238 Health Sciences, Audiology Frequency-Discrimination Performance of Normal-Hearing and Hearing-Impaired Listeners text Speech and Hearing Science Speech and Hearing Science University of Illinois at Urbana-Champaign Dissertation Ph.D.