Drive and performance modification following multiple (dark-dark) shifts in the photoperiod.
D000222:Adaptation, Physiological; D000818:Animals; D002940:Circadian Rhythm; D003201:Computers; D003216:Conditioning, Operant; D003624:Darkness; D005247:Feeding Behavior; D005260:Female; D000882:Haplorhini; D008027:Light; D008251:Macaca; D008297:Male; D012691:Serial Learning; D013223:Statistics as Topic