Franck N, Rouby P, Daprati E, Daléry J, Marie-Cardine M, Georgieff N
Institut des Sciences Cognitives, CNRS UPR 9075, Bron, France.
Schizophr Res. 2000 Jan 21;41(2):357-64. doi: 10.1016/s0920-9964(99)00067-5.
The present study was aimed at investigating whether schizophrenic patients are impaired in monitoring their own speech. In particular, we attempted to assess their ability to discriminate between overt and covert speech in a reading task, in order to verify whether they can correctly recollect the modality in which an internally generated action is produced. Subjects were asked to read either silently or aloud, items from a list of words. After a delay of 5 min, they were required to indicate in a new list which words had been read previously (either silently or overtly), or had never been presented during the reading task. With respect to normal controls, schizophrenic patients showed a significant bias to report that they had read aloud words which they had actually read silently, or which were absent during the reading task. The results are discussed in relation to recent neuroimaging studies on inner and overt speech in hallucinating schizophrenic patients. Our data favour the hypothesis that the inability to correctly discriminate between inner and overt speech may play a role in the onset of schizophrenic hallucinations.
本研究旨在调查精神分裂症患者在自我言语监测方面是否存在缺陷。具体而言，我们试图在一项阅读任务中评估他们区分公开言语和隐蔽言语的能力，以验证他们是否能够正确回忆起内部产生动作的方式。受试者被要求默读或朗读单词列表中的单词。延迟5分钟后，他们需要在一个新的列表中指出哪些单词之前读过（默读或朗读），哪些在阅读任务中从未出现过。与正常对照组相比，精神分裂症患者表现出明显的偏差，即报告他们朗读了实际上默读的单词，或者在阅读任务中未出现的单词。结合最近关于幻觉型精神分裂症患者内部言语和公开言语的神经影像学研究对结果进行了讨论。我们的数据支持这样一种假设，即无法正确区分内部言语和公开言语可能在精神分裂症幻觉的发作中起作用。
