Two nonverbal tasks of classificatory activity ("class inclusion" and "class intersection") were administered to 46 aphasics, 28 normal controls, 19 nonaphasic left-brain-damaged and 17 right-hemisphere-damaged patients in order to study (a) if aphasic patients are more impaired than nonaphasic brain-damaged patients on these two tasks of elementary logic and (b) if a relationship exists within the aphasic patients between inability to perform the tasks of classificatory activity and impairment of the semantic-lexical level of integration of language. Results were for the most part in line with expectations because (a) aphasics scored worse than normal controls and nonaphasic brain-damaged patients (even if the difference reached the level of statistical significance only on the test of "class intersection") and (b) within the aphasic patients the worst results were obtained by subjects presenting clear signs of semantic-lexical disintegration.
ASJC Scopus subject areas
- Language and Linguistics
- Experimental and Cognitive Psychology
- Neuropsychology and Physiological Psychology