Erickson R J, Goldinger S D, LaPointe L L
Department of Speech and Hearing Science, Arizona State University, Tempe, AZ 85287-1104, USA.
Brain Cogn. 1996 Mar;30(2):244-53. doi: 10.1006/brcg.1996.0016.
Previous research (LaPointe & Erickson, 1991) has shown that aphasic individuals have difficulty, relative to control subjects, in monitoring for spoken words while performing a secondary task. This finding may indicate that aphasics have fundamental deficits in attention or that their linguistic deficits are simply exacerbated by dividing attention. Twenty subjects, 10 nonfluent aphasic and 10 nonaphasic adults, listened to two 10-min series of nonlinguistic acoustic stimuli across conditions of focused and divided attention. Subjects tried to identify target sounds interspersed with nontarget sounds. As in prior research, aphasic subjects performed less accurately on the auditory vigilance task during the divided attention condition, relative to the undivided attention condition and to control subjects. The findings suggest that deficient cognitive processing, intertwined with linguistic deficit, may underlie auditory comprehension deficits in aphasia and may help explain performance variation within aphasic individuals across tasks.
先前的研究（拉波因特和埃里克森，1991年）表明，与对照受试者相比，失语症患者在执行次要任务时，监测口语单词存在困难。这一发现可能表明，失语症患者在注意力方面存在根本性缺陷，或者他们的语言缺陷仅仅因注意力分散而加剧。20名受试者，10名非流利性失语症患者和10名非失语症成年人，在集中注意力和分散注意力的条件下，听取了两系列时长10分钟的非语言声学刺激。受试者试图识别穿插在非目标声音中的目标声音。与先前的研究一样，相对于未分散注意力的条件和对照受试者，失语症受试者在分散注意力条件下的听觉警觉任务中表现得不太准确。研究结果表明，与语言缺陷交织在一起的认知处理不足，可能是失语症患者听觉理解缺陷的基础，并可能有助于解释失语症个体在不同任务中的表现差异。
