da Silva, Stephanie P Contextual determinants of temporal control: Behavioral contrast in a free-operant psychophysical procedure. [electronic resource] - Behavioural processes Feb 2006 - 157-63 p. digital Publication Type: Journal Article ISSN: 0376-6357 Standard No.: 10.1016/j.beproc.2005.11.005 doi Subjects--Topical Terms: AnimalsBehavior, Animal--physiologyColumbidaeConditioning, Operant--physiologyDifferential Threshold--physiologyEnvironmentPsychophysicsReaction Time--physiologyTime Perception--physiology