Multisensory narrative tracking by a profoundly deaf subject using an electrocutaneous vocoder and a vibrotactile aid.
A congenitally, profoundly deaf adult who had received 41 hours of tactual word recognition training in a previous study was assessed in tracking of connected discourse. This assessment was conducted in three phases. In the first phase, the subject used the Tacticon 1600 electrocutaneous vocoder to track a narrative in three conditions: (a) lipreading and aided hearing (L + H), (b) lipreading and tactual vocoder (L + TV), and (c) lipreading, tactual vocoder, and aided hearing (L + TV + H). Subject performance was significantly better in the L + TV + H condition than in the L + H condition, suggesting that the subject benefitted from the additional information provided by the tactual vocoder. In the second phase, the Tactaid II vibrotactile aid was used in three conditions: (a) lipreading alone, (b) lipreading and tactual aid (L + TA), and (c) lipreading, tactual aid, and aided hearing (L + TA + H). The subject was able to combine cues from the Tactaid II with those from lipreading and aided hearing. In the third phase, both tactual devices were used in six conditions: (a) lipreading alone (L), (b) lipreading and aided hearing (L + H), (c) lipreading and Tactaid II (L + TA), (d) lipreading and Tacticon 1600 (L + TV), (e) lipreading, Tactaid II, and aided hearing (L + TA + H), and (f) lipreading, Tacticon 1600, and aided hearing (L + TV + H). In this phase, only the Tactaid II significantly improved tracking performance over lipreading and aided hearing. Overall, improvement in tracking performance occurred within and across phases of this study.
Lynch
M P
MP
Department of Psychology, University of Miami.
Eilers
R E
RE
Oller
D K
DK
Urbano
R C
RC
Pero
P J
PJ
D000328:Adult; D003131:Combined Modality Therapy; D003463:Cues; D003638:Deafness / Q000628:therapy*; D005260:Female; D006310:Hearing Aids; D006801:Humans; D008085:Lipreading; D012682:Sensory Aids; D013067:Speech Perception; D014110:Touch; D014732:Vibration