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Rate Enhancement. Communication Rates. Conversational speaking rates: 150 wpm -250 wpm AAC rates: 15 wpm. Encoding . Any technique in which the user gives multiple signals that together specify a desired message (Vanderheiden & Lloyd, 1986).
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Communication Rates • Conversational speaking rates: 150 wpm -250 wpm • AAC rates: 15 wpm
Encoding • Any technique in which the user gives multiple signals that together specify a desired message (Vanderheiden & Lloyd, 1986). • Use of code allows the individual to indicate a small number of items that corresponds to larger vocabulary.
Reasons to use Encoding • Quick retrieval • Space availability • Advantages of electronic encoding. • No need for familiarity with code • Automatic translation of code into a spoken or printed message greater independence in producing messages.
Need for Quick Retrieval • Timing Enhancement • Require careful timing to be appropriate • “Please pick up my feet before you roll my wheelchair forward” • Message Acceleration & Fatigue Reduction • Frequently Used/Lengthy message: Use of encoding or other strategies (core voc) for QR • 100 words account for 60% communicated (Vanderheiden & Kelso, 1987)
