Auditory frequency discrimination learning is affected by stimulus variability
Auditory frequency discrimination learning is affected by stimulus variability
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DOI：
10.3758/bf03193525
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发表时间：
2005-05-01
期刊：
影响因子：
--
通讯作者：
Moore, DR
中科院分区：
文献类型：
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作者：
Amitay, S;Hawkey, DJC;Moore, DR
我们探讨了三组未经训练的听力正常的成年听众中训练集的可变性对纯音频率辨别（FD）的学习和概括的影响。第1组使用1 kHz（固定）的固定标准音调进行训练，第2组使用1 kHz左右的轻微变化（巡回）音调，第3组使用广泛变化的标准频率（宽巡回）。最初，三分之二的听众有低FD阈值（好听众），三分之一有中间到高阈值（差听众）。对于好的倾听者来说，训练集中的微小变化会减慢学习速度，但大的变化不会。无论训练条件如何，转移到未训练频率（最高4 kHz）和固定条件都是等效的，但第1组听众没有完全将学习转移到巡回条件。对于差的听众，在训练条件的任何变化减缓学习和受损转移到其他频率，但不影响转移到未经训练的条件。因此，训练集对进度和结果的影响取决于集的可变性和个体FD能力。
We explored the effects of training set variability on learning and generalization of pure-tone frequency discrimination (FD) in three groups of untrained, normally hearing adult listeners. Group 1 trained using a fixed standard tone at 1 kHz (fixed), Group 2 on slightly varying (roving) tones around 1 kHz, and Group 3 on widely varying standard frequencies (wide-roving). Initially, two thirds of all listeners had low FD thresholds (good listeners) and one third had intermediate to high thresholds (poor listeners). For good listeners, slight variations in the training set slowed learning but wide variations did not. Transfer to untrained frequencies (up to 4 kHz) and to the fixed condition was equivalent regardless of training condition, but Group 1 listeners did not fully transfer learning to the roving condition. For poor listeners, any variation in the training condition slowed learning and impaired transfer to other frequencies but did not affect transfer to untrained conditions. Thus, the effects of training set on progress and outcome depend on set variability and individual FD ability.