Enhancing the Effectiveness of the Visual to Auditory Sensory Substitution Training Program through Learning Theories

Sensory substitution transforms information normally received by impaired senses into alternate sensory inputs, leveraging brain plasticity to provide better access to visual information for individuals with sensory limitations. Visual to Auditory Sensory Substitution (VASS) converts visual data into auditory cues, aiding individuals with visual impairments. Despite prior research validating sensory substitution, effective VASS training programs remain underdeveloped. This study aims to address this gap by designing and evaluating a VASS training program based on educational theories like conceptual learning and information processing. A training program was developed for learning 23 shapes and figures, incorporating instructional strategies from educational psychology. The learning tasks were organized into modules that included review sessions, concept learning, repetitive practice, and assessments. The program's impact was assessed through a randomized experiment comparing a theory-based program with traditional repetitive training methods. Short-term and sustained outcomes were evaluated using midpoint test, immediate post-test, delayed post-test, and transfer test. The study involved adult learners without visual or auditory impairments to promote efficient program development and effectiveness evaluation. Statistically significant improvements were observed in the experimental group's midpoint and immediate post-test scores compared to the control group. However, no significant differences were found in the delayed post-test and transfer test. The findings suggest that integrating instructional design and learning strategies can lead to more effective training programs to support rehabilitation efforts for individuals with visual impairments. Further implications for rehabilitation are discussed.