Motivation (derived from the Latin movere, meaning 'to move') refers to the internal processes that give behavior its direction, energy, and persistence. In advanced psychological science, motivation is differentiated into primary (physiological, unlearned drives such as hunger, thirst, and sex) and secondary (psychosocial motives like achievement, affiliation, and power) drives.
- Evolutionary / Instinctual Approach: Rooted in Charles Darwin's theory of evolution and championed by William James and William McDougall. McDougall posited that humans possess unlearned, innate instincts (e.g., flight, repulsion, curiosity) that direct behavior toward specific survival-oriented goals.
- Drive-Reduction Theory: Formulated by Clark Hull (1943) based on Walter Cannon's concept of homeostasis. Hull proposed that physiological needs create an internal state of tension or arousal known as a drive (e.g., hunger), which motivates the organism to engage in behaviors that reduce the drive and restore equilibrium.
- Arousal Theory: As an extension and critique of drive reduction, this approach asserts that organisms seek to maintain an optimal level of physiological arousal. According to the Yerkes-Dodson Law, performance is optimal at moderate levels of arousal, dropping off when arousal is too low (boredom) or too high (panic).
- Incentive Theory: Postulates that behavior is strongly pulled by external stimuli, rewards, or environmental goals (incentives) rather than solely pushed by internal drives. This aligns closely with behavioral conditioning principles.