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A model of communicative development is described that includes seven progressively more complex levels of competence and a set of six criteria (communicative features) for assignment of individual behaviors to particular developmental levels. Research evidence documenting the progressive changes in the genesis of communicative competence is reviewed and synthesized. The paper concludes with a discussion of the implications of the communication model for assessment and intervention purposes.
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Holdgrafer et al. (1986) studied this question.
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