Reactivity and event-related potentials in attentional tests: Effect of training
Reactivity and event-related potentials in attentional tests: Effect of training
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DOI：
10.2466/pms.2002.94.3.817
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发表时间：
2002-06-01
影响因子：
1.6
通讯作者：
Lodi, L
中科院分区：
文献类型：
--
作者：
Fontani, G;Lodi, L
为了研究训练对反应性和事件相关电位的影响，对2 - 4名健康的年轻学生进行了一项涉及反应时的复杂注意力转移测试（测试1）。5天后，12名受试者在没有训练的情况下进行了相同的测试（测试2）（未经训练的受试者），而12名受试者在训练4天后的第5天重复了测试（训练过的受试者）。在测试1和2中，通过脑电图记录事件相关电位。这项任务包括每个受试者对计算机显示器屏幕上几何图形中心出现的字母刺激做出反应。在前刺激期，黑点被随机地画在屏幕的一个区域里。那个几何图形和字母出现在人群的中央。两个字母和四个几何图形以不同的方式随机组合在一起。当特定组合出现时，被试必须按下计算机键盘上的不同键。几何图形后接字母的刺激开始前，平均事件相关电位的特征是负波，与选择性注意密切相关。刺激开始后，记录P3复合波。在测试1中，训练组与未训练组无显著差异，而在测试2中，训练组的反应时较短，选择性注意相关波和P3波峰值较早，P3波振幅较高。这些测量结果及其相关性可作为训练效果的一个指标，可用于评价注意风格及其训练效果的改善。
To study the effects of training on reactivity and event-related potentials a complex attentional shifting test involving reaction time was administered (Test 1) to 2-4 healthy, young students, After five days, 12 subjects were tested with the same procedure (Test 2) without training (Untrained Subjects) while 12 repeated the test at the fifth day after four days of training (Trained Subjects). During Tests 1 and 2, event-related potentials were recorded by electroencephalogram. The task consisted of each subject responding to a stimulus of a letter appearing in the centre of a geometric figure on the screen Of a Computer monitor. In the prestimulus period black points were drawn and crowded randomly into a zone of the screen. The geometric figure and the letter were shown in the centre of the crowding. There were two letters and four geometric figures randomly combined in different ways. The subject had to press different keys of the computer keyboard when specific combinations appeared, The averaged event-related potentials were characterized by a negative wave with a close relationship to selective attention before the onset of the stimulus of a geometric figure followed by letters. After the stimulus onset, a P3 complex was recorded. Trained subjects were no different from untrained Subjects in Test 1, while in Test 2 they had a shorter reaction time, an earlier peak of the selective attention related wave and P3, and a higher amplitude for the P3 complex. These measures and the correlations between them can be considered an index of the training effects Thus, these tests could be used for evaluation of the attentional style and its modification with training.