| Popis: |
This paper reports the results of a study that investigated the effects of varying speech signals, passages, and questions on listener comprehension rates. The passages and comprehension questions used were taken from sample tests of the High School Equivalency Examination, the Scholastic Aptitude Test, and the Graduate Record Examination. These passages were then recorded using four speech output types: synthesized speech, digitized speech at a rate of 9600 bps, digitized speech at a rate of 2400 bps, and natural (human) speech. A reading group was also used in this study for control purposes. Results indicated statistically significant differences in comprehension rates between the natural speech group and the synthesized and 2400 bps digitized speech groups. Significant passage and question type effects were also found. These results and the voice output guidelines derived from this study are discussed in this paper. |
