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Briggs, James F.; Olson, Brian P. – Learning & Memory, 2013
We investigated whether reexposure to an amnestic agent would reverse amnesia for extinction of learned fear similar to that of a reactivated memory. When cycloheximide (CHX) was administered immediately after a brief cue-induced memory reactivation (15 sec) and an extended extinction session (12 min) rats showed retrograde amnesia for both…
Descriptors: Memory, Models, Fear, Drug Use
Berg, Mark E.; Grace, Randolph C. – Journal of the Experimental Analysis of Behavior, 2011
Six pigeons responded in a visual category learning task in which the stimuli were dimensionally separable Gabor patches that varied in frequency and orientation. We compared performance in two conditions which varied in terms of whether accurate performance required that responding be controlled jointly by frequency and orientation, or…
Descriptors: Stimuli, Classification, Reinforcement, Animals
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Rakison, David H.; Derringer, Jaime – Cognition, 2008
Previous studies with various non-human animals have revealed that they possess an evolved predator recognition mechanism that specifies the appearance of recurring threats. We used the preferential looking and habituation paradigms in three experiments to investigate whether 5-month-old human infants have a perceptual template for spiders that…
Descriptors: Animals, Infants, Recognition (Psychology), Safety