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KMID : 1036820170220010159
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Communication Sciences & Disorders
2017 Volume.22 No. 1 p.159 ~ p.169
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Analysis on Base Forms of High-Frequency Predicates to Develop Augmentative and Alternative Communication Systems
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Shin Sang-Eun
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Abstract
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Objectives: Core vocabulary is key to successful communication for people who rely on augmentative and alternative communication (AAC) systems. It is important to meet the needs of adult AAC users who want to produce a wide range of inflected predicates on the system. The purpose of the current study was to determine the high-frequency (HF) base forms of predicates and to predict the efficiency in generating various sentence types by using those base-forms that are combinable with numerous endings.
Methods: Language samples from the twelve healthy adults were used and 216 HF predicates in inflected forms were identified. After transforming all inflected forms into base forms, the number of different words, the mean frequency of a single HF predicate, and the percentage of total sample words that were accounted for by HF base-forms were calculated. The findings were compared with inflected forms of HF predicates.
Results: Sixty-three base forms were identified. The mean frequency of single predicates was 53.83, and 73.97% of the total sample's predicates were accounted for by HF base forms, which shows a great decrease in the number of different words, but a great increase in the mean frequency and the percentage of accountability.
Conclusion: The current study provides evidence that a small number of HF base forms of predicates can be used efficiently to produce various types of inflected predicates by combining with endings. The need for developing effective AAC tools that reflect HF base verb forms is discussed.
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KEYWORD
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Core vocabulary, Augmentative and alternative communication, Predicate, Base form, High frequency, Adult
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