Abstract
This study aimed to reexamine S. L. T. A. measurements. 313 aphasics were tested and principal component analysis and biquartimin rotation were administered. Three factors were derived which reflected writing, speech expression and comprehension. In order to compare with clinical evaluations, i. e., expressive, receptive, amnestic and expressive-receptive types, as well as severity of communication disabilities, we calculated factor scores. The factor scores of the expressive and receptive types showed similar distributions. Factor scores spread widely for every factor. The amnesic type showed good results on every factor. The expressive-receptive type showed poor on first and second factors, and spread widely on the third factor. Severe cases showed poor on all factors. Moderate cases showed good results on second or third factor scores. Mild cases did well also on the first factor. In other words, writing and speech expressive abilities are based on comprehensive ability. S. L. T. A. scores mainly show severity of aphasia, which reflects multidimensional factors .
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