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• Dopamine — For other uses, see Dopamine (disambiguation). Dopamine …   Wikipedia

• Intervening variable — An intervening variable is a hypothetical internal state that is used to explain relationships between observed variables, such as independent and dependent variables, in empirical research. History The term “intervening variable” was first used… …   Wikipedia

• Psychopathy — (IPA en|saɪˈkɒpəθi [ [http://www.bartleby.com/61/63/P0636300.html American Heritage Dictionary] ] [ [http://www.merriam webster.com/dictionary/psychopathy Merriam Webster s Online Dictionary] ] ) is a psychological construct that describes… …   Wikipedia

• animal learning — ▪ zoology Introduction       the alternation of behaviour as a result of individual experience. When an organism can perceive and change its behaviour, it is said to learn.       That animals can learn seems to go without saying. The cat that… …   Universalium