Perceptual learning and generalization resulting from training on an auditory amplitude-modulation detection task
Perceptual learning and generalization resulting from training on an auditory amplitude-modulation detection task
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DOI：
10.1121/1.3531841
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发表时间：
2011-02-01
影响因子：
2.4
通讯作者：
Wright, Beverly A.
中科院分区：
文献类型：
--
作者：
Fitzgerald, Matthew B.;Wright, Beverly A.
声音幅度的波动为识别包括语音在内的许多声音提供了重要线索。这里感兴趣的是检测这些波动的能力是否可以通过实践来提高，如果可以的话，这种学习是否可以推广到未经训练的案例。为了解决这些问题，听力正常的成年人 (n = 9) 接受了检测正弦幅度调制（SAM；80 Hz 速率，3-4 kHz 带通载波）的培训，每天 720 次试验，持续 6-7 天，并在相关 SAM 检测和 SAM 速率辨别条件的培训前后进行了测试。对照（n = 9）仅参加前测试和后测试。在测试前和测试后，受过训练的听者比受过训练的条件下的对照有所改善，但受过训练的听者的不同子组需要不同数量的练习才能达到渐近性能，范围从 1 (n = 6) 到 4-6 (n = 3) 次。这种训练诱导的学习并没有推广到使用两个未经训练的载波频谱（5 kHz 低通和 0.5-1.5 kHz 带通）的检测，也没有推广到使用训练的速率和载波频谱进行速率辨别，但有一些迹象表明它推广到使用两个未经训练的速率（30 和 150 Hz）进行检测。因此，实践提高了检测幅度调制的能力，但这种学习对未经训练的情况的推广有些限制。 (C) 2011 年美国声学学会。 [DOI：10.1121/1.3531841]
Fluctuations in sound amplitude provide important cues to the identity of many sounds including speech. Of interest here was whether the ability to detect these fluctuations can be improved with practice, and if so whether this learning generalizes to untrained cases. To address these issues, normal-hearing adults (n = 9) were trained to detect sinusoidal amplitude modulation (SAM; 80-Hz rate, 3-4 kHz bandpass carrier) 720 trials/day for 6-7 days and were tested before and after training on related SAM-detection and SAM-rate-discrimination conditions. Controls (n = 9) only participated in the pre- and post-tests. The trained listeners improved more than the controls on the trained condition between the pre- and post-tests, but different subgroups of trained listeners required different amounts of practice to reach asymptotic performance, ranging from 1 (n = 6) to 4-6 (n = 3) sessions. This training-induced learning did not generalize to detection with two untrained carrier spectra (5 kHz low-pass and 0.5-1.5 kHz bandpass) or to rate discrimination with the trained rate and carrier spectrum, but there was some indication that it generalized to detection with two untrained rates (30 and 150 Hz). Thus, practice improved the ability to detect amplitude modulation, but the generalization of this learning to untrained cases was somewhat limited. (C) 2011 Acoustical Society of America. [DOI: 10.1121/1.3531841]