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Psychology

University of Richmond

1977

Rats

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The Effects Of Litter Size On Behavioral Development And Adult Emotinoality In The Rat, Elizabeth N. Pully May 1977

The Effects Of Litter Size On Behavioral Development And Adult Emotinoality In The Rat, Elizabeth N. Pully

Master's Theses

The effects of the early experience variable of litter size is examined at two developmental time periods (infancy and adulthood) in the rat. The study departs from the majority of the early experience experimentation in its use of a naturally occurring independent variable in place of the typical handling and shocking procedures. Large (n = 9), medium (n = 5), small litters (n = 3) were developed by pooling rat pups at birth and then distributing them to randomly selected, lactating females. Observations of behaviors (including maternal grooming) during the preweaning stage of development disclosed substantial differences in response activity in the three ...