Effects of prior deprivation, current deprivation, and weight loss on the activity of the hungry rat.

Abstract

During a single 24-hr, period without food, following different immediatelyprior deprivation conditions, 7 groups of naive rats were tested in activity wheels. The groups were under 0-, 24-, 48-, 72-, or 96-hr, immediately-prior continuous deprivation and some groups had, in addition, 10 days of experience with a cyclic 24-hr, feeding schedule just prior to the continuous deprivation. It was found that, apart from the effect that these different deprivation conditions had upon S's loss of body weight, they had no effect upon activity. Activity level was found to be predominantly a function of weight loss, and independent of how weight had been lost.

EFFECTS OF FOOD DEPRIVATION ON FREE‐OPERANT AVOIDANCE BEHAVIOR1

“…This is 60 to 70% of their weiglht at 200 days when they were first started and about 50% of the weight they would lhave attained if allowed free feeding for a year. A second line of evidence is that activity as mieasured in running wheels is negatively correlated with body weight (Duda and Bolles, 1963;Moskowitz, 1959;Treichler and Collins, 1965;Treichler and Hall, 1962). Activity levels in a running wheel increase monotonically as weights are decreased to 60% free feeding.…”

Deprivation and Satiation: The Interrelations Between Food and Wheel Running

“…Many previous studies (Cornish & Mrosovsky, 1965;Duda & Bolles, 1963;Finger, 1951;Hall & Hanford, 1954;Reid & Finger, 1955) showed that depriving an organism of food resulted in a higher probability of wheel running. Such effects were sometimes interpreted as showing that food deprivation increases "general drive" as indexed by spontaneous activity (e.g., Teghtsoonian & Campbell, 1960).…”

Effects of activity on the rate of barpressing by rats

“…1 ( 62) and that this activity will increase even when many I. 'ontrols for associative coniponents are present (Duda & Bolles. 1963: Finger.…”