Instrumental conditioning in learning was introduced and demonstrated by:
**Core Concept**
Instrumental conditioning, also known as operant conditioning, is a type of learning process in which behavior is modified by its consequences, such as rewards or punishments. This concept is crucial in understanding how behaviors are acquired and modified in response to environmental stimuli.
**Why the Correct Answer is Right**
The correct answer, Ivan Pavlov's contemporary B.F. Skinner, introduced and demonstrated instrumental conditioning through his work on the operant conditioning chamber, also known as the Skinner box. Skinner's experiments showed that behavior can be modified by its consequences, such as the delivery of food or the presentation of a stimulus. He demonstrated that behavior can be increased or decreased based on its consequences, and that behavior can be shaped through the use of reinforcement, punishment, and extinction. Skinner's work built upon the foundation laid by Ivan Pavlov, who demonstrated classical conditioning, a different type of learning process.
**Why Each Wrong Option is Incorrect**
**Option A:** Ivan Pavlov is incorrect because, while Pavlov demonstrated classical conditioning, he did not introduce or demonstrate instrumental conditioning. Pavlov's work focused on the conditioned response to a stimulus, whereas instrumental conditioning involves behavior modification in response to consequences.
**Option B:** Edward Thorndike is incorrect because, although Thorndike's law of effect laid the groundwork for operant conditioning, he did not introduce or demonstrate instrumental conditioning. Thorndike's work focused on the relationship between behavior and its consequences, but Skinner's work built upon and expanded this concept.
**Option C:** John Watson is incorrect because, while Watson was a pioneer in the field of behaviorism, he did not introduce or demonstrate instrumental conditioning. Watson's work focused on the role of environment in shaping behavior, but he did not develop the concept of operant conditioning.
**Clinical Pearl / High-Yield Fact**
Skinner's operant conditioning chamber, or Skinner box, is a classic example of instrumental conditioning in action. This device allows researchers to manipulate variables such as reinforcement, punishment, and extinction to shape behavior, demonstrating the power of operant conditioning in modifying behavior.
**Correct Answer:** B. B.F. Skinner.