Reconstructive memory in the dating of personal and public news events.

Two experiments investigated memory for the dates of events selected and recorded by subjects in diaries. In Experiment 1, personal events and public news events were compared, with retention time varying from 1 week up to 9 months. It was found that the day of the week was more accurately identified for personal events than for news events, that day-of-the-week (DOW) accuracy did not decrease with increasing retention time, and that memory of the personal context of both event types was more important for DOW accuracy than was memory of the core of the events. These results support our view that memory of the day of the week is mainly reconstructed by reference to a temporal week schema based on personal experiences, and that the relation of news events to the week schema is mediated by memory of personal context. The distribution of DOW errors was modeled as the outcome of a process of guessing constrained by subdivisions of the week schema, without assuming any special temporal memory trace. In Experiment 2, the model was shown to fit independently collected data from a different subject pool and country equally well.