Psychological theories Psychological theories Activity theory (AT) is a Soviet psychological meta-theory, paradigm, or framework, with its roots in behaviourism. Its founders were Alexei Nikolaevich Leontyev, and S. L. Rubinshtein (1889-1960). It became one of the major psychological approaches in in the former USSR, being widely used in both theoretical and applied psychology, in areas such as the education, training, ergonomics, and work psychology. ...more on Wikipedia about "Activity theory"
(Conservation (psychology)) An ability in logical thinking according to the psychologist Jean Piaget who developed four stages in cognitive development. By the third stage, the Concrete operational stage, the child of age 7-11 has mastered this ability, to logically determine that a certain quantity will remain the same despite adjustment of the container, shape, or apparent size. ...more on Wikipedia about "Conservation (psychology)"
The James-Lange theory refers to an hypothesis on the origin and nature of emotions developed independently by two 19th-century scholars, William James and Carl Lange. The theory states that within human beings, as a response to experiences in the world, the autonomic nervous system creates physiological events such as muscular tension, a rise in heart rate, perspiration, and dryness of the mouth. Emotions, then, are feelings which come about as a result of these physiological changes, rather than being their cause. James and Lange arrived at the theory independently. Lange specifically stated that vasomotor changes are emotions. ...more on Wikipedia about "James-Lange theory"
The theory of cognitive development is a developmental psychology theory developed by Jean Piaget to explain cognitive development. The theory is central to child psychology and is based on schemata—schemes of how one perceives the world—in " critical periods," times when children are particularly susceptible to certain information. For his development of the theory, Piaget was awarded the Erasmus Prize. ...more on Wikipedia about "Theory of cognitive development"
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