The present study evaluated context-dependent learning under an operant conditioning procedure in infant rats. Preweanling rats were trained in context A during postnatal days (PDs) 16 and 17 to learn an appetitive operant ...

Studies of extinction in preweanling rats have failed to find ABA-renewal in a fear conditioning paradigm. This result supports the hypothesis postulating ontogenetic qualitative differences in experimental extinction. A ...

The taste reactivity test is considered as an objective measure to assess the hedonic impact of tastes. Both the appetitive and aversive pattern of responses are plastic and can change based on previous experience. The ...

Ethanol induces appetitive, aversive, and anxiolytic effects that are involved in the development ofethanol use and dependence. Because early ethanol exposure produces later increased responsiveness toethanol, considerable ...

Heterogeneous rat strains appear to be particularly sensitive to the sedative effects of ethanol as adults and insensitive to ethanol's stimulant effects. Recently, the authors found that ethanol induces stimulant effects ...

Subjects trained in successive positive contrast are usually given an appetitive stimulus of relatively low quality during a pre‐shift, followed by exposure to a significantly greater quality of the same stimulus. Enhanced ...

Conditioned tolerance can be conceptualized as a particular case of Pavlovian conditioning in which contextual cues play the role of the conditioned stimulus. Although the evidence is contradictory, it is frequently assumed ...

Over the last 30. years a considerable number of reports have explored learning about context during infancy in both humans and rats. This research was stimulated by two different theoretical frameworks. The first, known ...