ABSTRACT
Maslow (1971) proposed that the needs of a person are arranged in a hierarchical order of importance. The most important needs appear at the bottom of the hierarchy. Once a given level of need is satisfied, it no longer serves to motivate. The following needs are distinguished (Baron and Greenberg, 1990):
■ Physiological needs. Physiological needs (e.g. hunger, thirst and sleep) are the most basic of all the needs.
