Hagoort P
Max Planck Institute for Psycholinguistics, Nijmegen, The Netherlands.
Brain Lang. 1997 Feb 1;56(2):287-300. doi: 10.1006/brln.1997.1849.
This study tests the recent claim that Broca's aphasics are impaired in automatic lexical access, including the retrieval of word meaning. Subjects are required to perform a lexical decision on visually presented prime target pairs. Half of the word targets are preceded by a related word, half by an unrelated word. Primes and targets are presented with a long stimulus-onset-asynchrony (SOA) of 1400 msec and with a short SOA of 300 msec. Normal priming effects are observed in Broca's aphasics for both SOAs. This result is discussed in the context of the claim that Broca's aphasics suffer from an impairment in the automatic access of lexical-semantic information. It is argued that none of the current priming studies provides evidence supporting this claim, since with short SOAs priming effects have been reliably obtained in Broca's aphasics. The results are more compatible with the claim that in many Broca's aphasics the functional locus of their comprehension deficit is at the level of postlexical integration processes.
本研究对最近的一种说法进行了验证，即布罗卡失语症患者在自动词汇提取方面存在障碍，包括词义的检索。要求受试者对视觉呈现的启动词-目标词对进行词汇判断。一半的目标词之前是相关词，另一半之前是不相关词。启动词和目标词分别以1400毫秒的长刺激起始异步（SOA）和300毫秒的短SOA呈现。在两种SOA条件下，布罗卡失语症患者均观察到正常的启动效应。在布罗卡失语症患者存在词汇-语义信息自动提取障碍这一说法的背景下，对这一结果进行了讨论。有人认为，目前的启动研究均未提供支持这一说法的证据，因为在短SOA条件下，布罗卡失语症患者已可靠地获得了启动效应。这些结果更符合以下说法，即在许多布罗卡失语症患者中，其理解缺陷的功能位点在于词汇后整合过程层面。
