Auditory change detection: simple sounds are not memorized better than complex sounds.
Psychol Sci. 2008-01-01; 19(1): 85-91
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1. Psychol Sci. 2008 Jan;19(1):85-91. doi: 10.1111/j.1467-9280.2008.02050.x.
Auditory change detection: simple sounds are not memorized better than complex
Demany L(1), Trost W, Serman M, Semal C.
(1)Université Bordeaux 2 , Bordeaux, France.
Previous research has shown that the detectability of a local change in a visual
image is essentially independent of the complexity of the image when the
interstimulus interval (ISI) is very short, but is limited by a low-capacity
memory system when the ISI exceeds 100 ms. In the study reported here, listeners
made same/different judgments on pairs of successive « chords » (sums of pure tones
with random frequencies). The change to be detected was always a frequency shift
in one of the tones, and which tone would change was unpredictable. Performance
worsened as the number of tones increased, but this effect was not larger for 2-s
ISIs than for 0-ms ISIs. Similar results were obtained when a chord was followed
by a single tone that had to be judged as higher or lower than the closest
component of the chord. Overall, our data suggest that change detection is based
on different mechanisms in audition and vision.
PMID: 18181796 [Indexed for MEDLINE]