Models of attention and dual-task performance as explanatory constructs in aphasia.

摘要: Aphasia has traditionally been viewed as a loss or impairment of language. However, evidence is presented suggesting that language mechanisms are fundamentally preserved and aphasic behaviors instead due to impairments cognitive processes supporting their construction. These may be understood linguistically specialized attentional system vulnerable competition from other processing domains. We present two models attention focus on for central discuss findings dual-task studies normal performance. First, competing nonlanguage tasks appear share limited-capacity, parallel resources. Second, individuals demonstrate slowed could reduction in capacity ability allocate capacity. Third, the discussed bear coherent relationship current processing. Clinical implications account aphasia also considered.