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This research studied deaf students' performance on memory span and component reading tasks that incorporated processes involved in higher level comprehension. The instruments developed in the study provide the basis for the measurement of functional working memory capacity, vocabulary knowledge, domain-relevant knowledge, and inference abilities. Multiple regression analysis was used to construct models that show the contributions of the independent assessments to reading comprehension ability. Overall results suggest that working memory operates as a general executive system, as indicated by significant correlations between subjects' performance on reading and nonreading tasks. Limitations in vocabulary knowledge continue to pose problems in reading for deaf individuals. General or procedural knowledge also plays a part in reading comprehension processes.
Garrison et al. (Tue,) studied this question.