Abstract
Each of 16 aphasics took a comprehension test that was devised from the Token Test. Every patient was asked to follow the directions which were given by synthetic speech sounds with three different conditions. In the first condition, the directions were given at the rate of 4.6 syllables per second. In the second condition, the directions were given at the rate of 2.4 syllables per second, and between these syllables the silent intervals were inserted. In the third condition, the directions were given at the rate of 2.4 syllables persecond, and the vowel component of each syllable was prolonged.
The ratio of correct performances was the highest in the third condition, and the lowest in the first condition.
The results indicate that presentation with slower rate contributes to comprehensibility, and the length of vowel duration and ⁄ or the silent intervals between syllables may affect auditory comprehension of aphasic patients.
