We examined whether the functionality of spatial relations affects the construction and memory of information in situation models. A functional relationship involves the interaction of entities that is implied by either typical use or contextual demands. Previous research has shown that spatial relations are less likely to be encoded during comprehension unless there is extensive prior knowledge, explicit instructions to attend to spatial information, or a clear emphasis on spatial information. Ifthe construction of a situation model is guided by a need to understand the functional structure of a situation, then functional spatial relations should be more likely to be encoded. The results of our study showed that sentences with functional spatial relations were read faster and remembered better in both recall and recognition tests than sentences with nonfunctional spatial relations.A situation model is a mental representation of a specific situation (Johnson-Laird, 1983;van Dijk & Kintsch, 1983;. In text comprehension, situation models represent the described situation, not the text itself (Glenberg, Meyer, & Lindem, 1987). Thus, these representations serve as working models of the world. The organization of information in situation models not only is relevant for comprehension, but also has implications for the later memory ofthat information (Radvansky & Zacks, 1997). This is important because information that is comprehended is relatively valueless unless it can be usefully retained and retrieved over time. The present study assessed whether the functionality of relational information affects its encoding and memory in a situation model. The particular focus was on spatial relations because they are a situational component that is relatively easy to test in an objective fashion and because spatial information is one of the more heavily studied aspects of situation models.
FunctionalityFor our purposes, the term functionality refers to the actual or likely interaction between two or more entities in a situation in which the state of one entity would be affected by a second entity in a meaningful way. There are several aspects of this description that warrant elaboration. First, there is the idea ofan interaction. There is some involvement of the entities with one another in a functional Portions of this research were presented at the 1999 meeting of the Midwestern Psychological Association in Chicago. We thank Laura Carlson-Radvansky and RolfZwaan for their helpful comments during the course of the project. and Kelly Crowhurst, Jackie Curiel. and Bill