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"Behavioral sink" is a term invented by ethologist John B. Calhoun to describe a collapse in behavior that can result from overpopulation.The term and concept derive from a series of over-population experiments Calhoun conducted on Norway rats between 1958 and 1962. [1]
John Calhoun was born May 11, 1917, in Elkton, Tennessee, the third child of James Calhoun and Fern Madole Calhoun.Their first child died in infancy. Calhoun had three siblings: an older sister, Polly; and two younger brothers, Billy and Dan.
Overcrowding may arise temporarily or regularly, in the home, in public spaces or on public transport. Overcrowding in the home can cause particular concern, since the home is an individual's place of shelter. Effects on quality of life due to crowding may include increased physical contact, lack of sleep, lack of privacy and poor hygiene ...
Prior to Robert Tryon’s study of selective rat breeding, concluded in 1942, many psychologists believed that environmental, rather than genetic, differences produced individual behavioral variations. Tryon sought to demonstrate that genetic traits often did, in fact, contribute to behavior.
Rat Park was a series of studies into drug addiction conducted in the late 1970s and published between 1978 and 1981 by Canadian psychologist Bruce K. Alexander and his colleagues at Simon Fraser University in British Columbia, Canada.
In addition to describing his earlier abodes as drug dens that led other family members into addiction, she blasted Kennedy for his views on vaccines, said he is addicted to power and described ...
The test was developed to study spatial learning and how it differed from other forms of associative learning. [11] Originally rats, now more commonly mice, were placed in an open pool and the latency to escape was measured for up to six trials a day for 2–14 days. [12] Several variables are used to evaluate an animal's performance.
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