Final answer:
The principal perspectives on motivation are Job design, Process, and Reinforcement.
Step-by-step explanation:
The principal perspectives on motivation are Job design, Process, and Reinforcement. Job design focuses on how the organization structures the tasks and roles of its employees to enhance motivation. Process perspectives examine how individuals perceive and interpret their own actions and outcomes, and how these perceptions influence motivation. Reinforcement perspectives focus on how rewards and punishments shape behavior and motivation.