David McClelland's thoery that life experiences change requirements with time. The 3 teams tend to be success, affiliation, and energy. Each person identifies with your needs centered on past experiences.
A theory suggested by David McClelland that defines how your life encounters changes specific needs with time. Classified into three groups; achievement, association or energy, these requirements are formed because of the experiences of the person. In his obtained requirements Theory, McClelland proposes each individual falls into one of these brilliant three categories according to their personal choice plus in regards to individual experiences.