Example: Significant Differences in Investment Size across Time

To demonstrate the use of the repeated measures ANOVA, this chapter uses a new fictitious experiment that examines a different aspect of the investment model (Rusbult, 1980). Remember from earlier chapters that the investment model is a theory of interpersonal attraction that describes the variables that determine commitment to romantic relationships and other interpersonal associations.

Designing the Study

Some of the earlier chapters have described fictitious investigations of the investment model that involved the use of fictitious partners: written descriptions of potential romantic partners that the participants responded to as if they were real people. Assume that critics ...

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