Summary
Highlights
Positive reinforcement adds something pleasant to increase behavior, while negative reinforcement removes something unpleasant to increase behavior. Positive punishment adds something unpleasant to decrease behavior, and negative punishment removes something pleasant to decrease behavior. Conditioned behavior will eventually disappear if manipulation stops, a process called extinction.
B.F. Skinner, building on Edward L. Thorndike's work, popularized operant conditioning. He believed organisms encounter stimuli that lead to behavioral changes and tested this using the Skinner Box. This apparatus, featuring a lever that dispensed food, demonstrated how conditioning occurs.
Conditioning follows a three-term contingency: Antecedent (the trigger, e.g., rat hitting lever), Behavior (the response, e.g., rat pressing lever), and Consequence (the outcome, e.g., food appearing). The schedule of reinforcement impacts the strength and predictability of the response, with random reinforcement leading to erratic behavior.
Skinner, a behaviorist, argued that only visible behavior should be studied and considered free will an illusion. His work formed the basis for behavioral therapy, military drills, and animal training.
An example exercise involves a person leaving the room, choosing a task, and then using clapping as positive reinforcement to guide the person to complete the task without direct instructions. Louder clapping signals correct actions, while less or no applause indicates straying from the task.
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Operant conditioning involves increasing or decreasing a behavior by adding a consequence. Both reinforcement and punishment can be positive (adding something) or negative (removing something), leading to four ways to influence behavior.