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The design of CAST (Computer-Aided Speechreading Training).

M K Pichora-Fuller1, A P Benguerel

  • 1University of Toronto, Ontario.

Journal of Speech and Hearing Research
|February 1, 1991
PubMed
Summary

This study introduces the Computer-Aided Speechreading Training (CAST) system, a digital tool designed to enhance speechreading skills for adults with hearing loss. CAST offers automated lessons and assessments to improve visual speech perception and communication effectiveness.

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Area of Science:

  • Audiology
  • Rehabilitation Engineering
  • Speech-Language Pathology

Background:

  • Acquired mild-to-moderate hearing loss affects preretirement adults.
  • Aural rehabilitation programs often lack standardized, accessible tools.
  • Speechreading (lipreading) is a crucial skill for communication in this population.

Purpose of the Study:

  • To describe the design and implementation of the Computer-Aided Speechreading Training (CAST) system.
  • To present CAST as a component of a comprehensive aural rehabilitation program.
  • To evaluate the effectiveness of CAST in improving speechreading skills.

Main Methods:

  • Development of an interactive, automated training system (CAST) with eight lessons.
  • Utilized a modified discourse tracking method with viseme-specific texts.
  • Assessed visual speech perception, linguistic redundancy, and feedback mechanisms.

Main Results:

  • CAST simulates face-to-face intervention for speechreading assessment and training.
  • Evaluated skills through CAST tracking rate, receiver strategy, and inferred error type.
  • Provided case assessments demonstrating CAST's potential as a standardizable rehabilitative tool.

Conclusions:

  • CAST serves as a valuable, standardizable tool for speechreading rehabilitation.
  • The system addresses the need for accessible and effective aural rehabilitation components.
  • Further evaluation in companion studies confirms CAST's utility.

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