Definition. A theory that is based on the evolution of how a product moves through a four-step process, or life cycle, from beginning to end. This process begins with the introduction of the product, and then it moves on to the growth stage, the maturity stage, and ends with a decline in the product's sales.
The most influential version of this theory is put forward by B. F. Skinner in 1959. His version of Behaviourism is best known as Radical Behaviourism. Skinner, sought to give ethical grounding to behaviourism, relating it to pragmatism. Types of Behavioural Learning.
Specific Theories. In addition to theories proposed by psychologists like Clark Hull or Abraham Maslow, Sigmund Freud and William James were psychologists who developed theories that resonate with the concept of acting by instinct.