This study reports on auditory-motor and sonar aid training in a child from age 6 months to 4 years. As an infant, the child used the aid for a variety of purposes, including reaching, feeding, and walking, after she had received auditory-motor training. As a preschooler, she used the aid to explore novel environments and avoid objects in her path. The relation between the child's use of the aid as an infant and as a preschooler is discussed, and the importance of training in the use of such a device is stressed.
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