PERCEPTUAL SHARPENING IN THE DEVELOPING RAT
PERCEPTUAL SHARPENING IN THE DEVELOPING RAT
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DOI：
10.1037/0735-7036.97.1.3
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发表时间：
1983-01-01
影响因子：
1.4
通讯作者：
HAROUTUNIAN, V
中科院分区：
文献类型：
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作者：
CAMPBELL, BA;HAROUTUNIAN, V
在4个实验中研究了514只Sprague-Dawley大鼠感知锐化的发展，使用心率定向反应（[HROR]对新刺激的显著心脏减速）作为依赖性测量。在15次试验中，16-17或19-20日龄的断奶前Ss习惯于1，600 Hz的音调。在试验16中，将刺激频率改变为分布在习惯性刺激两侧的7个音调中的1个。HROR的分析表明，16-27日龄的SS未能响应任何新的频率，这表明在所研究的频率范围内的听觉刺激的习惯化泛化。与此相反，19-20日龄的Ss显示HROR与习惯刺激和测试刺激之间的差异成正比。这些与年龄相关的差异不是由于对测试刺激的敏感性差异、效应器疲劳或无法区分测试刺激。结果表明，知觉锐化发展相对迅速，在大鼠和知觉锐化，刺激检测，刺激歧视遵循单独的个体发育的时间进程。(14参考）（PsycINFO数据库记录（c）2016阿帕，保留所有权利）
Studied the development of perceptual sharpening in 4 experiments with 514 Sprague-Dawley rats using the heart rate orienting response ([HROR] marked cardiac deceleration to novel stimuli) as the dependent measure. Preweanling Ss either 16–17 or 19–20 days of age were habituated to a 1,600-Hz tone over 15 trials. On Trial 16, the stimulus frequency was changed to 1 of 7 tones distributed on either side of the habituated stimulus. Analysis of the HROR showed that 16–27 day old Ss failed to respond to any of the new frequencies, which indicated generalization of habituation to the auditory stimuli within the frequency range studied. In marked contrast, 19–20 day old Ss displayed an HROR proportional to the difference between the habituated and the test stimuli. These age-related differences were not due to differences in sensitivity to the test stimuli, effector fatigue, or inability to discriminate between the test stimuli. Results indicate that perceptual sharpening develops relatively rapidly in rats and that perceptual sharpening, stimulus detection, and stimulus discrimination follow separate ontogenetic time courses.(14 ref)(PsycINFO Database Record (c) 2016 APA, all rights reserved)