- K0542
- His needs and abilities exceed the available vocabulary on the TechTalk8 and MessageMate.
- K0543
- He was unable to spell adequately to generate novel messages on a purely text-based device.
- K0544
- The black/white symbols on the Dynamo display were difficult to discriminate and interfered with his symbol selection accuracy and rate.
- The DynaVox exceeded the size/weight criteria for the patient to carry independently/safely.
- During trials with the DynaMyte, successful communication behaviors were noted.
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