Effect of Caption Rate on the Comprehension of Educational Television Programmes by Deaf School Students
Published in Deafness and Education International (2009), several experts investigate how the rate of caption delivery affects the comprehension of educational programmes by better- and poorer-reading deaf school children. Participants watched three short documentaries, with captions presented at 90, 120, or 180 words per minute (wpm). Across both reading levels, comprehension was uniformly higher at 90 and 120 wpm than at 180 wpm. These results suggest that the rate of captions in children's television programmes can safely use 120 wpm as a slowest speed.