Activity theory
Activity theory (AT; ) is an umbrella term for a line of eclectic social sciences theories and research with its roots in the Soviet psychological activity theory pioneered by Lev Vygotsky , Alexei Leont'ev and Sergei Rubinstein. These scholars sought to understand human activities as systemic and socially situated phenomena and to go beyond paradigms of reflexology (the teaching of Vladimir Bekhterev and his followers) and classical conditioning (the teaching of Ivan Pavlov and his school), psychoanalysis and behaviorism. It became one of the major psychological approaches in the former USSR, being widely used in both theoretical and applied psychology, and in education, professional training, ergonomics, social psychology and work psychology.
Generativity Theory
Generativity Theory is a formal, predictive theory of creative behavior in individuals. First proposed by American psychologist Robert Epstein in the early 1980s, the theory asserts that novel behavior is the result of a dynamic interaction among previously established behaviors; in other words, new ideas result from interconnections among old ones.