Analysis of View Angle Used in Speechreading Training of Sentences

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Abstract
This study examines the effects of sentence perception across three speaker viewing angles: front view (0°), quarter view (45°), and side view (90°). The performance of a female adult with postlingual hearing loss was measured for accuracy at each angle. The present study used a single-subject, alternating treatment design where three treatment angles were randomly presented in every session. The percentage accuracy levels for each session were compared to determine the most effective treatment viewing angle of the speaker. The results indicated that the side-view angle was most effective, as the percentage gain of improvement was greatest in combination with the consistent upward trend of the data points across treatment sessions. The performance at front-view and quarter-view angles was also successful. The results of this preliminary effort indicate the value of treatment for visual sentence perception at all three angles, including the nontraditionally targeted side view.

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