Sarant J Z, Cowan R S, Blamey P J, Galvin K L, Clark G M
Department of Otolaryngology, University of Melbourne, Royal Victorian Eye and Ear Hospital, Victoria, Australia.
J Rehabil Res Dev. 1993;30(4):423-35.
This study examined differential performance of normally hearing subjects using a tactile device on the dominant versus non-dominant hand. The study evaluated whether tactual sensitivity for non-speech stimuli was greater for the dominant hand as compared with the non-dominant hand, and secondly, whether there was an advantage for speech presented tactually to the dominant hand, resulting from a preferential pathway to the language processing area in the left cerebral hemisphere. Evaluations of threshold pulse width, dynamic ranges, paired electrode identification, and a closed-set tactual pattern discrimination test battery showed no difference in tactual sensitivity measures between the two hands. Speech perception was assessed with closed sets of vowels and consonants and with open-set Harvey Gardner (HG) words and Arthur Boothroyd (AB) words. Group mean scores were higher in each of the tactually aided conditions as compared with the unaided conditions for speech tests, with the exception of AB words in the tactile plus lip-reading plus audition/lip-reading plus audition condition on the right hand. Overall mean scores on the closed-set vowel test and on open-set HG and AB words were significantly higher for the tactually aided condition as compared with the unaided condition. Comparison of performance between the dominant and non-dominant hand showed a significant advantage for the dominant hand on the closed-set vowel test only. No significant differences between hands in either tactually aided or unaided conditions were evident for any of the other speech perception tests. Factors influencing this result could have been variations in degree of difficulty of the tests, the amount of training subjects received, or the training strategy employed. Although an advantage to presenting speech through the dominant hand may exist, it is unlikely to be great enough to outweigh possible restrictions on everyday use.
本研究使用一种触觉设备，对听力正常的受试者在优势手与非优势手上的不同表现进行了检测。该研究评估了非言语刺激的触觉敏感度在优势手与非优势手之间是否存在差异，其次，通过触觉呈现给优势手的言语是否具有优势，这是由于存在一条通向左侧大脑半球语言处理区域的优先通路。对阈值脉冲宽度、动态范围、成对电极识别以及一组封闭集触觉模式辨别测试的评估表明，两只手在触觉敏感度测量方面没有差异。使用封闭集的元音和辅音以及开放集的哈维·加德纳（HG）单词和亚瑟·布斯罗伊德（AB）单词对言语感知进行了评估。与言语测试的无辅助条件相比，在每种触觉辅助条件下，各组的平均得分都更高，但右手在触觉加唇读加听觉/唇读加听觉条件下的AB单词测试除外。与无辅助条件相比，触觉辅助条件下封闭集元音测试以及开放集HG和AB单词的总体平均得分显著更高。优势手与非优势手之间的表现比较表明，仅在封闭集元音测试中优势手具有显著优势。在任何其他言语感知测试中，无论是触觉辅助还是无辅助条件下，两只手之间均未发现明显差异。影响这一结果的因素可能包括测试难度程度的差异以及受试者接受的训练量或所采用的训练策略。尽管通过优势手呈现言语可能存在优势，但这种优势不太可能大到足以超过对日常使用可能造成的限制。
