Dear Stuart, Deniz and all,
reading this email I thought of a study I discussed a few years ago
with Harry Levitt that seemed to fit the description. I saw it in
print a while back but couldn't locate it now, so I emailed Harry.
Harry's reply was, as always, informative and interesting and, with his
permission, I am copying it below. In addition to Moe's book and the
chapter suggested by Deniz there are some other papers Harry mentioned
(and sent copies which I can share off the list).
from Harry's email:
"...There are five papers relevant to your query, three of which are attached.
1. I. believe the paper you are referring to is the one with Hoffman. It
describes a method for investigating the perception of interrupted
speech. Katz, Bocca, Calearo and others used between-ear switched
speech as a diagnostic tool in evaluating auditory processing disorders.
The problem with this early work on between-ear switched speech was
poor precision in controlling the switching process. We can do
considerably better today with computer-controlled digitized
speech. This is an area in which I have great interest and I would be
very interested in your research in this area. A copy of the paper is
A Note on Simultaneous and Interleaved Masking. I. Hoffman, and H. Levitt. J. Communication Disorders, 11, 207-213, l978.
2. The paper with
Hoffman did not investigate age-related effects. I think the method of
comparing interleaved and simultaneous masking of binaural switched
speech is a particularly sensitive technique for investigating
age-related auditory processing deficits because of the large body of
physiological and behavioral data showing a substantial age-related
deficit in temporal processing. My book chapter with Oden, et
al. introduces the concept of age-related auditory processing
deficits, as opposed to auditory processing disorders. A disorder is abnormal, an age-related deficit is
a normal aspect of aging. It is not a disorder. Moe's research is
relevant here in that he showed that the perception of interrupted
speech was much poorer than other forms of distorted speech. Moe's data
is cited in this chapter as an example of a normal age-related deficit
in auditory processing that is particularly severe. The chapter covers a
lot of material and this particular point
is often overlooked by researchers dealing with interrupted speech. A
copy of this chapter is attached.
training methods for age-related APD: Past, present, and future, H.
Levitt, C. Oden, H. Simon, C. Noack & A. Lotze. Chapter 30 in
Auditory Processing Disorders: Assessment, Management and Treatment:
Second Edition, D Geffner and D Swain, (Eds.), San Diego:Plural Press,
3. I believe that the
following paper is Moe's first publication in a peer-reviewed journal on
age-related perception of distorted speech, including
interrupted speech. A
copy of the paper is attached.
Decrement in Hearing for Speech . Sampling and Longitudinal Studies, M.
Bergman, V. G.Blumenfeld, D. Cascardo, B. Dash, H. Levitt, M. K.
Margulies, , J. Gerontol., 31(5), 533-538, 1976.
4.. Moe summarizes his experiments on age-related perception of distorted speech in his book, Aging and the
Perception of Speech, M Bergman, 1980. The book is available from Amazon
5. The following book
chapter reviews the state of the art on age-related speech-understanding
in the late 1970s. Much of Moe's work is cited in this review.
Aging and Speech
Understanding. J. Pickett, M. Bergman and H. Levitt. Sensory Systems
and Communication in the Elderly, 10, 167-186, 1979."