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Speech intelligibility reduces over distance from an attended location: Evidence for an auditory spatial gradient of attention

Attention, perception & psychophysics, 2009, Vol.71 (1), p.164-173 [Peer Reviewed Journal]

Psychonomic Society, Inc. 2009 ;2009 INIST-CNRS ;Copyright Springer Science & Business Media Jan 2009 ;ISSN: 1943-3921 ;EISSN: 1943-393X ;DOI: 10.3758/APP.71.1.164 ;PMID: 19304606

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Title:
Speech intelligibility reduces over distance from an attended location: Evidence for an auditory spatial gradient of attention
Author: Allen, Kachina ; Alais, David ; Carlile, Simon
Subjects: Adult ; Attention ; Behavioral Science and Psychology ; Biological and medical sciences ; Cognitive Psychology ; Communication disorders ; Discrimination Learning ; English ; Evidence ; Experiments ; Female ; Fire alarms ; Fundamental and applied biological sciences. Psychology ; Humans ; Intelligibility ; Language ; Listening Comprehension ; North American English ; Orientation ; Perceptual Masking ; Production and perception of spoken language ; Psychology ; Psychology. Psychoanalysis. Psychiatry ; Psychology. Psychophysiology ; Sound Localization ; Speech ; Speech Perception ; Speech Reception Threshold Test ; Stimuli ; Studies ; Visual Stimuli
Is Part Of: Attention, perception & psychophysics, 2009, Vol.71 (1), p.164-173
Description: Speech reception thresholds (SRTs) were measured at a central focus of attention and at 20°, 40°, and 60° locations distant in azimuth. Measurements were taken with one target collocated with two maskers, or with maskers flanking the target by ±20°. For 80% of trials, the target was played from the attended location (“expected”), and 20% came from another (“unexpected”) location. For collocated stimuli, SRTs worsened with increasing distance from the expected location by 2.1 dB over the 60° azimuth and by 5.1 dB for spatially separated target and maskers. In spatially separated conditions, a 2.9-dB change was still found when gaze was away from the attended location. Spatial attention appears to increase speech intelligibility against interferers, with gain decreasing with distance from the focus of attention. Spatial release from masking (RFM) was only found for the attended location. Further experiments suggest that target location uncertainty prevented RFM at unattended locations.
Publisher: New York: Springer-Verlag
Language: English
Identifier: ISSN: 1943-3921
EISSN: 1943-393X
DOI: 10.3758/APP.71.1.164
PMID: 19304606
Source: MEDLINE
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Speech intelligibility reduces over distance from an attended location: Evidence for an auditory spatial gradient of attention

Psychonomic Society, Inc. 2009 ;2009 INIST-CNRS ;Copyright Springer Science & Business Media Jan 2009 ;ISSN: 1943-3921 ;EISSN: 1943-393X ;DOI: 10.3758/APP.71.1.164 ;PMID: 19304606

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