The LPI, a test for assessing communicative competence in a foreign or second language has been adapted for use as a Sign Communication Proficiency Interview (SCPI). 1 Discussion covers (a) an SCPI Rating Scale, (b) linguistic and cultural factors important for sign communicative competence, and (c) skills in communicating simultaneously in signing and speaking.
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Newell et al. (1983) studied this question.
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