Individual differences in cognitive synthesis: An M-capacity analysis

Abstract

Individual differences in children's propensity to demonstrate cognitive synthesis were evaluated using an artificial reading task. Six-year-olds were asked to demonstrate the meaning of various sentences constructed of logographs, or whole-word symbols, which were arranged in either a meaningful (i.e., grammatical) or scrambled (i.e., ungrammatical) order. Some children demonstrated the sentences in a synthesized mode (expressing a single idea unit), while others used a nonsynthesized mode (expressing the meanings of individual logographs). Overall, synthesizers had a larger attentional reserve, or M-capacity, than nonsynthesizers. The two groups did not differ significantly in age, intellectual level, or reading achievement. As predicted by their larger M-capacity, synthesizers demonstrated from memory significantly more items from meaningful sentences than nonsynthesizers. However, when synthesizers attempted to integrate the scrambled sentences, the excessive operative schemes needed to reorganize the items reduced their recall performance to the level of nonsynthesizers.