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How Do Situation Models Differ in Narrative and Expository Text? A Comparison Based on Five Situational Dimensions RYUTA ISEKI (DOCTORAL PROGRAM IN PSYCHOLOGY, UNIVERSITY OF TSUKUBA) AND ERIKO KAWASAKI (DEPARTMENT OF PSYCHOLOGY, KAWAMURA GAKUEN WOMAN'S UNIVERSITY) JAPANESE JOURNAL OF EDUCATIONAL PSYCHOLOGY, 2006, 54, 464-475 The present study investigated how situation models differ in narrative and expository text. The experiments were based on an event-indexing model that assumed 5 situational dimensions: identity, time, space, causality, and intentionality. According to this model, if events in a text were consistent within each situational dimension, these events would be more associated than others. We evaluated associative strength from the clustering pattern in a verb-clustering task. In Experiment 1, fairy tales and expository text were compared. It was found that each situational dimension, most especiallyspace and intentionality, contributed differently to association. In Experiment 2, using novel stories and expository text, a better model was investigated by comparing several models assuming different contributions in each situational dimension. The model that differed in space and intentionality indicated the bestmodel fit. This model suggests that space has no effect in narratives, but a negative effect in expository text, whereas intentionality strengthens associations in narratives, but not in expository text. Key Words: situation model, narrative text, expository text, organization, text comprehension