The frequency of traffic accidents for the State of California for the week preceding and the week subsequent to the fall and spring DST changes were analyzed for the years 1976, 1977, and 1978. Regardless of season of the year, DST change was associated with a significant increase in traffic accidents during the post-change weeks.
The differences in habitual sleep duration and absolute deviations in habitual sleep duration from the normative mean between 60 left-, 36 mixed- and 125 right-handed college students were tested. It was found that mixed-handers tend to sleep less and as a group show significantly greater deviations in habitual sleep durations than either left- or right-handers. The heuristic value of this relationship for future research was discussed briefly.
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