Ten hospital corpsmen working the 11 p.m. to 7 a.m. shift were selected for a study of night workers. Each completed a questionnaire describing his experiences with night work, and each slept in the laboratory for several days, while continuous EEG recordings were made. Although the quantity and distribution of the EEG sleep stages was not greatly different from that found in night sleep periods, there were some irregularities in the progression of EEG patterns, particularly interruptions in Stage REM sleep. It appeared that Ss slept better, worked better, and felt better after several weeks of assignment to night shift work.

Sleep of night workers: eeg recordings

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: Two programs were designed to assist the investigator of sleep in reducing polygraphic data to useful statistical forms. The first program accepts simple statements of sleep stage and the polygraph page numbers on which the stage occurs, and converts these to an ordered table describing an individual sleep data file. Several optional input formats are also permissable. Summary statistics on the file are provided, both as print-outs and as punch card outputs. A tape for input to a general purpose plotting program is written. A second program combines punch card outputs from one or more groups of files and provides descriptive statistics on these groups. (Author)

P. Cook

Papers

Statistical reduction of hand-staged sleep analysis,