Yorkston K M, Beukelman D R, Smith K, Tice R
University of Washington, Seattle.
J Speech Hear Disord. 1990 May;55(2):225-30. doi: 10.1044/jshd.5502.225.
The three primary purposes of this project are (a) to identify those word sequences that occur frequently across a group of 10 linguistically intact augmented communicators, (b) to determine the communality with which the various augmented communicators use specific word sequences, and (c) to evaluate the usefulness of word sequences in providing keystroke savings for users of augmentative and alternative communication (AAC) devices as compared to letter-by-letter spelling or single-word retrieval. Communication samples were collected for 14 consecutive days from 10 subjects who used AAC devices. These samples were analyzed with custom software to determine the frequency of occurrence of one-, two-, three-, four-, and five-word sequences. The results revealed that three-, four-, and five-word sequences occurred very infrequently within and across communication samples. Two-word sequences occurred much more frequently than the longer sequences. The authors concluded that clinicians should continue to encourage linguistically intact clients to select long messages (three words or more) for their AAC devices based on message content and the urgency with which messages need to be delivered rather than relying exclusively on statistical analysis. However, statistically based multiword analysis should not be abandoned. Frequently occurring one- and two-word sequences may be an important source of messages that will increase communication efficiency when stored and retrieved in an AAC device.
（a）识别在一组10名语言功能完好的辅助沟通者中频繁出现的单词序列；（b）确定不同辅助沟通者使用特定单词序列的共性；（c）与逐字母拼写或单字检索相比，评估单词序列在为辅助和替代沟通（AAC）设备用户节省按键次数方面的有用性。从10名使用AAC设备的受试者那里连续14天收集了沟通样本。使用定制软件对这些样本进行分析，以确定一至五个单词序列的出现频率。结果显示，三至五个单词序列在沟通样本内部和之间出现的频率非常低。双词序列出现的频率比更长的序列高得多。作者得出结论，临床医生应继续鼓励语言功能完好的客户根据信息内容和信息传递的紧急程度，为其AAC设备选择长信息（三个单词或更多），而不是仅仅依赖统计分析。然而，基于统计的多词分析不应被放弃。频繁出现的单词和双词序列可能是重要的信息来源，当在AAC设备中存储和检索时，这些信息将提高沟通效率。
