A model of top-down gain control in the auditory system

被引：8
|
作者：
Schneider, Bruce A. [1 ]
Parker, Scott [2 ]
Murphy, Dana [3 ]
机构：
[1] Univ Toronto, Dept Psychol, Mississauga, ON L5L 1C6, Canada
[2] American Univ, Dept Psychol, Washington, DC 20016 USA
[3] Nipissing Univ, Dept Psychol, N Bay, ON P1B 8L7, Canada
来源：
ATTENTION PERCEPTION & PSYCHOPHYSICS | 2011年 / 73卷 / 05期
基金：
加拿大自然科学与工程研究理事会;
关键词：
Hearing; Absolute identification; Gain control; Cochlear amplifier; Loudness; Compression; Amplification; ABSOLUTE IDENTIFICATION; STIMULUS RANGE; INTENSITY; LOUDNESS; DISCRIMINATION; DIFFERENCE; ATTENTION;
D O I：
10.3758/s13414-011-0097-7
中图分类号：
B84 [心理学];
学科分类号：
04 ; 0402 ;
摘要：
To evaluate a model of top-down gain control in the auditory system, 6 participants were asked to identify 1-kHz pure tones differing only in intensity. There were three 20-session conditions: (1) four soft tones (25, 30, 35, and 40 dB SPL) in the set; (2) those four soft tones plus a 50-dB SPL tone; and (3) the four soft tones plus an 80-dB SPL tone. The results were well described by a top-down, nonlinear gain-control system in which the amplifier's gain depended on the highest intensity in the stimulus set. Individual participants' identification judgments were generally compatible with an equal-variance signal-detection model in which the mean locations of the distribution of effects along the decision axis were determined by the operation of this nonlinear amplification system.
引用
收藏
页码：1562 / 1578
页数：17
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