 Empirical research linking the perceived psychological and physiological benefits of participation in different types of daily human occupation is ongoing.Questions about the nature of different dimensions of human occupation and their influences on human identity, behavior and states of being are viewed by occupational scientists as suitable areas of investigation.Developmental theorists have long hypothesized that the occupations of childhood and activity related events characteristic of different stages of adulthood are critical factors in physical, cognitive and psychological growth and maturation .