Perceptual learning remains task specific with TPE training
Perceptual learning remains task specific with TPE training
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TPE 培训中感知学习仍然是特定于任务的
DOI：
10.1167/14.10.950
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发表时间：
2014-08
影响因子：
1.8
通讯作者：
Zhang J.Y.
中科院分区：
文献类型：
--
作者：
Cong L.J. Wang R.J. Yu C.;Zhang J.Y.
已知视觉感知学习是特定于训练视网膜的位置，方向/方向和任务。然而，在以前的研究中，我们使用了新的“双重训练”和“训练加暴露”（TPE）训练协议，使学习完全转移到未训练的位置和方向。在这里，我们通过使用TPE协议来检验任务特异性问题，以检验感知学习可能包含任务独立成分的假设，任务特异性可能源于观察者对未训练任务的不熟悉。研究了中央凹Gabor的对比度和定向辨别知觉学习及其相互迁移。观察者接受了一个任务的训练。在同一会话中，在交替的试验块中，或在随后的会话中，他们也在超阈值（4.5 x阈值）下执行并熟悉其他任务（暴露条件）。结果表明：(1)在无暴露条件下，定向和对比辨别学习均具有任务特异性，重复了已知的任务特异性；(2)当增加暴露条件时，学习表现出向其他任务的显著迁移，但这种迁移可以通过前测和超阈值任务练习的联合效应来解释，而TPE（训练加暴露）方案没有统计学上显著的额外效益证据。这些结果表明了我们的新训练协议在实现特定感知学习转移方面的边界，并支持了已知的结论，即感知学习是特定于任务的，至少对于我们训练的任务来说，即使使用TPE协议也是如此。结果与我们的理论一致，即在感知学习过程中，观察者学习执行特定任务的规则。这些规则适用于未经训练的视网膜位置和方向，但不适用于未经训练的新任务。
Visual perceptual learning is known to be specific to the trained retinal location, orientation/direction, and task. However, in previous studies we have used new" double training" and" training-plus-exposure"(TPE) training protocols to enable complete learning transfer to untrained locations and orientations/directions. Here we examined the task specificity issue by using a TPE protocol to test the hypothesis that perceptual learning may contain a task-independent component, and task specificity may result from an observer's unfamiliarity of the untrained task. Perceptual learning of contrast and orientation discrimination for a foveal Gabor and their mutual transfers were studied. The observers were trained with one task at threshold. Simultaneously in the same session in alternating blocks of trials or in later sessions they also performed and familiarized the other task at suprathreshold (4.5 x thresholds)(The exposure condition). Our results show:(1) Without the exposure condition both orientation and contrast discrimination learning was task specific, replicating known task specificity;(2) When the exposure condition was added, learning showed significant transfer to the other task, but the transfer could be accounted for by the effect of combined pretest and suprathreshold task practice, with no statistically significant evidence for extra benefits from the TPE (training plus exposure) protocol. These results suggest the boundary of our new training protocols in enabling the transfer of specific perceptual learning and support the known conclusion that perceptual learning is task specific, at least for our trained tasks, even with the TPE protocol. The results are consistent with our theory that during perceptual learning the observers learn the rules of performing a specific task. Such rules are applicable to untrained retinal locations and orientations/directions, but not to an untrained new task.