Overview
This lecture covers the core principles of the behaviorist approach in psychology, focusing on classical and operant conditioning, their features, applications, and criticisms.
The Behaviorist Approach
- Behaviorism focuses on observable behavior, ignoring unobservable internal mental processes (the "black box").
- Behaviorists study stimulus-response mechanisms: how a stimulus leads to a specific response.
- They prioritize scientific methods with controlled experiments, often using animals for reliable results.
- Behavior is seen as learned from environmental interactions, not innate (not inherited).
Classical Conditioning (Pavlov)
- Ivan Pavlov discovered classical conditioning while studying digestive responses in dogs.
- Classical conditioning is learning by association between a neutral stimulus and an unconditioned stimulus.
- Example: Dogs salivate to a metronome after it is paired with food.
- In phobias, a neutral stimulus (e.g., bee) becomes feared when associated with pain (being stung).
Operant Conditioning (Skinner)
- B.F. Skinner developed operant conditioning, focusing on voluntary behaviors learned from consequences.
- Positive reinforcement: Adding a pleasant stimulus to increase behavior (praise after tidying room).
- Negative reinforcement: Removing an unpleasant stimulus to increase behavior (stopping nagging after tidying).
- Positive punishment: Adding an unpleasant stimulus to decrease behavior (extra chores after swearing).
- Negative punishment: Taking away a pleasant stimulus to decrease behavior (removing phone after swearing).
- Extinction occurs when reinforced consequences stop and the learned behavior fades.
- Behavior shaping involves rewarding increasingly complex behaviors.
Differences Between Classical & Operant Conditioning
- Classical conditioning involves involuntary, reflex responses; operant conditioning involves voluntary actions.
- Classical conditioning is about acquiring responses, while operant conditioning maintains them.
- In phobias, classical conditioning explains acquisition; operant conditioning explains avoidance through negative reinforcement.
Evaluation of the Behaviorist Approach
- Strengths: Highly scientific, replicable procedures, and effective real-life applications (therapy, classroom management).
- Weaknesses: Difficulty generalizing animal findings to humans; reductionist view oversimplifies complex human behaviors.
- Ethical concerns: Manipulative use of conditioning (e.g., social media, gambling) can cause harmful behaviors.
Key Terms & Definitions
- Behaviorism — Psychological approach focusing on observable behaviors learned from the environment.
- Stimulus — Any event or situation that evokes a response.
- Response — Observable reaction to a stimulus.
- Classical Conditioning — Learning by associating a neutral stimulus with an unconditioned stimulus.
- Operant Conditioning — Learning through consequences of behavior (rewards or punishments).
- Reinforcement — Any consequence that increases the likelihood of a behavior.
- Punishment — Any consequence that decreases the likelihood of a behavior.
- Extinction — The weakening and eventual disappearance of a learned behavior when reinforcement stops.
- Reductionist — Oversimplifying behavior by attributing it to single factors.
Action Items / Next Steps
- Review examples of classical and operant conditioning.
- Consider applications of conditioning in real-world scenarios.
- Prepare for evaluation questions comparing behaviorism to other psychological approaches.