Determinants of processing for a propositional structure

The main purpose of this study was to characterize differences among propositions within a propositional structure. Propositions were described in terms of degree (the number of other propositions to which each is connected) and in terms of a kind of hierarchical level. Paragraphs having a given structure were tested in three tasks: selection of the most important proposition, free recall, and reading under two orienting instructions. Performance was analyzed according to degree and level of the individual propositions and according to the sequences of propositions within the paragraphs. All of these variables affected performance in various tasks. The results were discussed in terms of the distinction between initial encoding and subsequent recall.