Morphological awareness and reading comprehension: to what extent do semantic relations in the classic sentence completion task influence associations?

Abstract It is well-established that morphological awareness is related to reading comprehension. Morphological awareness is often assessed with a sentence completion task, in which children are asked to complete a sentence with a related word (e.g., “warm. He chose the jacket for its __”). As evident from this classic example, semantic relations could influence performance because warmth is related in meaning to jacket . We examine whether the degree of semantic relations in the sentence completion task influences the association between morphological awareness and reading comprehension. In grade 3, English-speaking children did a sentence completion task in two conditions: one with sentences designed to have high semantic relations with the target and another with low. Children also completed control measures of non-verbal reasoning, vocabulary, phonological awareness, working memory, and word reading fluency. At grade 4, children completed reading comprehension. Hierarchical regression analyses showed that performance on both conditions of the sentence completion task (i.e., high and low semantic relations) significantly predicted reading comprehension, after all controls. Intriguingly, when both tasks were in the same regression, only performance on the high semantic relations task made a unique contribution to reading comprehension. The findings confirm the contribution to reading comprehension of morphological awareness, assessed with the sentence completion task, and show the relevance of semantic dimensions to these relations. As such, findings appear to validate the use of sentence completion to assess morphological awareness and highlight its capture of the multidimensional nature of morphological awareness, including its semantic dimensions.