Behaviorism: Foundations and Key Figures in Psychology

Behaviorism (1920s)

Definition and Core Principles

Behaviorism is an approach to psychology that emphasizes the study of observable behavior, focusing on the relationship between stimuli and responses. This perspective rejects introspection and the study of mental processes that cannot be directly observed.

• Observable Behavior: Behaviorism centers on actions that can be measured and recorded, rather than internal thoughts or feelings.

• Stimulus-Response: The primary focus is on how external stimuli elicit specific behavioral responses.

Historical Context

In the early 20th century, psychologists sought to make psychology a more scientific discipline by focusing on observable phenomena. This led to the rise of behaviorism, which dominated psychological research and theory from the 1920s to the 1950s.

• Scientific Method: Behaviorists advocated for the use of experimental methods and objective measurement.

• Dominance: Behaviorism was the leading approach in psychology during the mid-20th century.

Main Research Question

Behaviorists aimed to answer: How do stimuli and reinforcement shape behavior?

Important Founders of Behaviorism

Name	Dates	Key Contributions
Ivan Pavlov	1849 – 1936	Discovered classical conditioning through experiments with dogs. Showed that dogs could learn to associate a neutral stimulus (bell) with food, leading to a conditioned response (salivation). Classical Conditioning: Learning by association between stimuli. Example: Dog salivates when hearing a bell previously paired with food.
John B. Watson	1878 – 1958	Established behaviorism as a formal field in psychology. Argued that psychology should only study observable behavior. Famous for the "Little Albert" experiment, demonstrating conditioned emotional responses in humans. Behavior: Defined as any observable action. Example: Child develops a fear of white rats after repeated pairings with loud noises.
B.F. Skinner	1904 – 1990	Expanded behaviorism to include operant conditioning. Studied how consequences (reinforcement and punishment) shape voluntary behavior. Invented the "Skinner box" for controlled experiments with animals. Operant Conditioning: Learning based on the consequences of behavior. Example: Rat presses a lever to receive food, increasing lever-pressing behavior.

Key Concepts in Behaviorism

• Classical Conditioning: Learning through association between two stimuli. Equation: $\text{CS} + \text{US} \rightarrow \text{CR}$

• Operant Conditioning: Learning through consequences (reinforcement or punishment). Equation: $\text{Behavior} \xrightarrow{\text{Reinforcement}} \text{Increased Behavior}$

• Reinforcement: Any event that strengthens or increases the likelihood of a behavior.

• Punishment: Any event that weakens or decreases the likelihood of a behavior.

Timeline of Behaviorism

• Behaviorism was most dominant in psychology from 1920 – 1950.

Review Questions

• B.F. Skinner is credited with establishing operant conditioning and advancing behaviorism as a formal field in psychology.

• John B. Watson is credited with establishing behaviorism as a formal field in psychology.

Summary Table: Key Figures in Behaviorism

Figure	Contribution
Ivan Pavlov	Classical conditioning
John B. Watson	Formalized behaviorism, emphasized observable behavior
B.F. Skinner	Operant conditioning, reinforcement and punishment

Additional info: Behaviorism laid the foundation for later developments in learning theory and cognitive psychology. For more details, see the section on Learning.