Steps, stages, and structure: Finding compensatory order in scientific theories.

Abstract

Stage theories are prominent and controversial in science. One possible reason for their appeal is that they provide order and predictability. Participants in Experiment 1 rated stage theories as more orderly and predictable (but less credible) than continuum theories. In Experiments 2-5, we showed that order threats increase the appeal of stage theories of grief (Experiment 2) and moral development (Experiments 4 and 5). Experiment 3 yielded similar results for a stage theory on Alzheimer's disease characterized by predictable decline, suggesting that preference for stage theories is independent of valence. Experiment 4 showed that the effect of threat on theory preference was mediated by the motivated perception of order, and Experiment 5 revealed that it is particularly the fixed order of stages that increases their appeal.