Rat

Effects of environmental complexity on constituents of brain and liver

Year Published: 1965Animal Type: Rat, Rodent

Citation: Geller, E., Yuwiler, A., Zolman, J. F. 1965. Effects of environmental complexity on constituents of brain and liver. Journal of Neurochemistry 12, 949-955.

Social factors affecting emotionality and resistance to disease in animals: IV

Individual caging decreased the subjects' immunocompetence and, hence their resistance.

Year Published: 1964Animal Type: Rat, Rodent

Citation: Ader, R., Friedman, S. B. 1964. Social factors affecting emotionality and resistance to disease in animals: IV. Differential housing, emotionality, and Walker 256 carcinosarcoma in the rat. Psychological Reports 15, 535-541.

Postweaning experiences and emotional responsiveness

Environmental enrichment reduces emotionality.

Year Published: 1964Topics: Environmental Enrichment, Rearing & WeaningAnimal Type: Rat, Rodent

Citation: Duke, J. D., Seaman, J. L. 1964. Postweaning experiences and emotional responsiveness. Psychological Reports 14, 543-546.

The effects of an enriched environment on the rat cerebral cortex

Year Published: 1964Animal Type: Rat, Rodent

Citation: Diamond, M. C., Krech, D., Rosenzweig, M. R. 1964. The effects of an enriched environment on the rat cerebral cortex. Journal of Comparative Neurology 123, 111-119.

Chemical and anatomical plasticity of brain

The control animals are kept under colony conditions, housed three in a cage and exposed to ongoing activity in the room. ... For enhanced experience, animals were given Environmental Complexity and Training [groups of 10 to 12 animals in large...

Year Published: 1964Animal Type: Rat, Rodent

Citation: Bennett, E. L., Diamond, M. C., Krech, D. et al. 1964. Chemical and anatomical plasticity of brain. Science 146, 610-619.

Effects of diet and type of nesting material on the reproduction and lactation of the rat

Reproductive improvements due to paper nesting material were dramatic. The 10.8 pups per litter weaned by mothers nested in paper was very significantly higher than the 7.0 pups weaned by those with wood shaving. A more sensitive measure of the...

Year Published: 1966Animal Type: Rat, Rodent

Citation: Nolen, G. A., Alexander, J. C. 1966. Effects of diet and type of nesting material on the reproduction and lactation of the rat. Laboratory Animal Care [Laboratory Animal Science] 16, 327-336.

Adrenocortical response to novelty and noxious stimulation

It was found in rats that the magnitude of the stress response to being transferred into an experimental cage is virtually the same as that produced by electrical shock. ... Exposure to a new environment, or novelty, may contribute significantly...

Year Published: 1967Animal Type: Rat, Rodent

Citation: Friedman, S. B., Ader, R. 1967. Adrenocortical response to novelty and noxious stimulation. Neuroendocrinology 2, 209-212.

Comparison of behavioural development in socially isolated and grouped rats

Single-housed males showed reduced activity and a greater incidence of stereotypical tail manipulation [substitute social response?] and pawing with hind legs than males housed in groups.

Year Published: 1967Animal Type: Rat, Rodent

Citation: Baenninger, L. P. 1967. Comparison of behavioural development in socially isolated and grouped rats. Animal Behaviour 15, 312-323.

Social and nonsocial attraction in rats

Single rats show a reduction of fear in a strange environment when another - though anesthetized - rat is present.

Year Published: 1968Animal Type: Rat, Rodent

Citation: Latane, B., Glass, D. 1968. Social and nonsocial attraction in rats. Journal of Personality and Social Psychology 9, 142-146.

Gregariousness and fear in laboratory rats

In a novel open-field environment rats showed less signs of fear [number of fecal boluses excreted] when tested in pairs versus alone. The presence of a caged companion was less effective than a free-moving companion in reducing fear.

Year Published: 1969Animal Type: Rat, Rodent

Citation: Latane, B. 1969. Gregariousness and fear in laboratory rats. Journal of Experimental Social Psychology 5, 61-69.