How does motivation activate, direct, and sustain behavior. Multiple factors motivate behavior: need state of biological or social deficiency, lead to goal-directed behaviors. Need hierarchy maslow"s arrangement of needs, in which basic survival needs must be met before people can satisfy higher needs, lacked empirical support. Personal growth at pinnacle, survival at basis b/c req. fulfill biological needs, feel safe, secure, love, etc. first. Self-actualization a state that is achieved when one"s personal dreams and aspirations have been attained: drive psychological state, motivates organism to satisfy its needs. Homeostasis body functions" tendency to keep equilibrium. Basic drivers help maintain equilibrium (set-point) w/ biological states (hunger/thirst) Drive increases proportionally to a deprived need. Habits dev. when behaviors consistently reduces a drive ex. watch to relief stress, develop tv habit. Arousal generic term describe physiological activation, incl. increased brain activity, autonomic responses, sweating, or muscle tension. Drive states create arousal, encourage remedy act.