Stimulus effects on cancellation task performance in children with and without dyslexia
Stimulus effects on cancellation task performance in children with and without dyslexia
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DOI：
10.3758/brm.41.2.539
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发表时间：
2009-05-01
影响因子：
5.4
通讯作者：
Wang, Tsui-Ying
中科院分区：
文献类型：
--
作者：
Huang, Ho-Chuan;Wang, Tsui-Ying
测试的敏感性和给药时间在临床环境中评估视觉空间注意力时都很重要，特别是外部效度。本研究的目的是提出一个自适应模型，提供了一个参考，通过操纵目标分心（T/D）的比率和刺激的数量上的计算机取消测试系统的测试修改。任务与不同的T/D比和数量的刺激被提交给两组儿童和无阅读障碍（n = 41和65，分别），以确定他们的视觉空间注意力表现是否不同的测试形式。总的来说，两组在命中率、完成时间和性能质量（PQ）评分方面存在显著差异。视觉注意的PQ得分受T/D比的影响，而不是由刺激的数量。研究结果表明，T/D比有很强的PQ成绩的影响，它应该考虑到测试和任务设计。
Both the sensitivity and administration time of a test are important in evaluating visuospatial attention in clinical settings, especially with respect to external validity. The purpose of the present study was to propose an adaptive model that provides a reference for test modification by manipulating target-to-distractor (T/D) ratios and the number of stimuli on the computerized cancellation test system. Tasks with different T/D ratios and numbers of stimuli were presented to two groups-children with and without dyslexia (n = 41 and 65, respectively)-to determine whether their visuospatial attention performance differed on different test forms. In general, there were significant differences between the two groups in hit rates, completion times, and performance quality (PQ) scores. The PQ score of visual attention was affected by the T/D ratios rather than by the number of stimuli. The findings suggested that the T/D ratio has a strong effect on PQ scores, and that it should be taken into consideration in test and task design.