Davidson R J, Leslie S C, Saron C
University of Wisconsin, Department of Psychology, Madison 53706.
Neuropsychologia. 1990;28(5):471-85. doi: 10.1016/0028-3932(90)90073-w.
This experiment was designed to test whether reading disabled boys differ from matched controls on behavioral measures of interhemispheric transfer time (IHTT). Specifically, we proposed that language-disordered reading disabled children who had deficits in naming would show either faster or slower IHTTs compared with controls. From an initial group of 118 right-handed males, we selected a group of 25 disabled and 25 normal readers, matched on age. All subjects had to obtain a full scale IQ of 90 or above, a PIQ score of 85 or above, and a scaled score of 7 or above on the Block Design Subtest of the WISC-R. After meeting additional criteria for group assignment, manual reaction time (RT) measures of IHTT were obtained in response to simple visual and tactile stimuli during two laboratory testing sessions. Half the trials were conducted with the hands in an uncrossed orientation and half with the hands crossed in order to examine the effects of spatial compatibility on estimates of IHTT. The results revealed no overall group differences in IHTT for any of the conditions. However, correlations between IHTT measures and indices of cognitive performance indicated that faster IHTTs were significantly correlated with poorer performance on measures of reading and language function in the dyslexic group. These data are discussed within the context of a model of interhemispheric transfer deficits in disabled readers.
本实验旨在测试阅读障碍男孩在半球间传递时间（IHTT）行为测量方面是否与匹配的对照组存在差异。具体而言，我们提出，在命名方面存在缺陷的语言障碍阅读障碍儿童与对照组相比，其IHTT可能更快或更慢。从最初的118名右利手男性中，我们挑选出一组25名阅读障碍儿童和25名正常阅读者，他们在年龄上相匹配。所有受试者的全量表智商必须达到90或以上，操作智商分数达到85或以上，并且在韦氏儿童智力量表修订版（WISC-R）的积木图案分测验中量表分数达到7或以上。在满足分组的其他标准后，在两次实验室测试过程中，针对简单视觉和触觉刺激，获取了IHTT的手动反应时间（RT）测量值。一半的试验是双手不交叉进行的，另一半是双手交叉进行的，以便研究空间兼容性对IHTT估计值的影响。结果显示，在任何条件下，两组在IHTT方面均无总体差异。然而，IHTT测量值与认知表现指标之间的相关性表明，阅读障碍组中较快的IHTT与阅读和语言功能测量中的较差表现显著相关。将在阅读障碍者半球间传递缺陷模型的背景下讨论这些数据。
