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Re: Criterion differences when measuring threshold
I passed Walt's email along to Lynne - she asked me to add that there was
another study from that same era where she showed that the difference
between old and younger listeners was that older listeners were less willing
to shift their criteria -- it was published in J. Gerontoloy 46, 67-70.
From: AUDITORY Research in Auditory Perception
[mailto:AUDITORY@LISTS.MCGILL.CA] On Behalf Of Jesteadt, Walt
Sent: Thursday, April 22, 2004 6:38 AM
Subject: Re: Criterion differences when measuring threshold
Lynn Marshall and I looked at criterion differences in threshold
measurements for young and old normal hearing and hearing impaired listeners
about 20 years ago (Marshall and Jesteadt, 1986, JSHR, 29, 82-91) because
there was a silly theory at the time that a shift to more conservative
criteria was an important factor in presbycusis. We found that listeners in
a standard audiological testing procedure produce thresholds that are
equivalent to 90 to 95% correct in a forced-choice procedure. There was no
difference in response criterion as a function of age or hearing loss. Our
bottom line summary was that in Nebraska, all listeners were conservative.
From: Ben Hornsby [mailto:ben.hornsby@VANDERBILT.EDU]
Sent: Wednesday, April 21, 2004 10:37 AM
Subject: Criterion differences when measuring threshold
I'm looking for information about potential criterion differences (during
threshold testing and speech understanding testing) between young and
elderly listeners. Specifically, is there evidence to suggest that a
subject's criterion for responding "I heard it" can change when measuring
thresholds in noise versus thresholds in quiet and does this change vary
between young and elderly?
Also any tip toward a reference discussing criterion differences between
young and elderly on speech understanding tasks would be appreciated (I have
Jerger et al (1988) Effect of response criterion on measures of speech
understanding in the elderly).
Benjamin W.Y. Hornsby, Ph.D.
Research Assistant Professor
Vanderbilt Bill Wilkerson Center
1114 19th Avenue South
Nashville, TN 37212