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ERIC Number: EJ934638
Record Type: Journal
Publication Date: 2011-Aug
Pages: 10
Abstractor: As Provided
Reference Count: 40
ISSN: ISSN-0096-1523
An Objective Measurement of the Build-Up of Auditory Streaming and of Its Modulation by Attention
Thompson, Sarah K.; Carlyon, Robert P.; Cusack, Rhodri
Journal of Experimental Psychology: Human Perception and Performance, v37 n4 p1253-1262 Aug 2011
Three experiments studied auditory streaming using sequences of alternating "ABA" triplets, where "A" and "B" were 50-ms tones differing in frequency by [delta]f semitones and separated by 75-ms gaps. Experiment 1 showed that detection of a short increase in the gap between a B tone and the preceding A tone, imposed on one ABA triplet, was better when the delay occurred early versus late in the sequence, and for [delta]f = 4 vs. [delta]f = 8. The results of this experiment were consistent with those of a subjective streaming judgment task. Experiment 2 showed that the detection of a delay 12.5 s into a 13.5-s sequence could be improved by requiring participants to perform a task on competing stimuli presented to the other ear for the first 10 s of that sequence. Hence, adding an additional task demand could improve performance via its effect on the perceptual organization of a sound sequence. The results demonstrate that attention affects streaming in an objective task and that the effects of build-up are not completely under voluntary control. In particular, even though build-up can impair performance in an objective task, participants are unable to prevent this from happening. (Contains 3 figures.)
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Publication Type: Journal Articles; Reports - Research
Education Level: Adult Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A