TY  - JOUR
PY  - 1989//
TI  - The influence of a 1 h nap on performance overnight
JO  - Ergonomics
A1  - Rogers, A. S.
A1  - Spencer, M. B.
A1  - Stone, B. M.
A1  - Nicholson, A. N.
SP  - 1193
EP  - 1205
VL  - 32
IS  - 10
N2  - The effect on performance overnight of a 1 h nap taken at 0200 h was studied in six young female subjects. The subjects completed three schedules, including one with a nap and two without a nap, during which either a placebo or 300 mg caffeine was ingested at 2315 h. Performance was measured from 1700 h in the evening until 1030 h the next morning. Caffeine improved performance overnight on almost all tasks compared with placebo. The nap had some limited beneficial effect compared with placebo, but most tasks remained impaired.<p />  <p>Language: en</p>
LA  - en
SN  - 0014-0139
UR  - http://dx.doi.org/
ID  - ref1
ER  -