Dynamic attending and responses to time.

A temporally based theory of attending is proposed that assumes that the structure of world events affords different attending modes. Future-oriented attending supports anticipatory behaviors and occurs with highly coherent temporal events. Time judgments, given this attending mode, axe influenced by the way an events ending confirms or violates temporal expectancies. Analytic attending supports other activities (e.g., grouping, counting), and if it occurs with events of low temporal coherence, then time judgments depend on the attending levels involved. A weighted contrast model describes over- and underestimations of event durations. The model applies to comparative duration judgments of equal and unequal time intervals; its rationale extends to temporal productions/extrapolations. Two experiments compare predictions of the contrast model with those derived from other traditional approaches. One characteristic of modern society is a preoccupation with fixed time schedules and standardized timekeepers. We maintain appointments at hourly intervals, rush to meet the 5:00 p.m. bus, and dine at predetermined hours. Yet our natural ability to judge time remains poorly understood. How often do