Operant Conditioning
Introduction
Operant conditioning is a type of learning in which the strength of a behavior is modified by its
consequences, such as rewards or punishments. It involves voluntary behaviors—actions
performed by choice, unlike reflexive or involuntary responses studied in classical conditioning.
In simple terms, it can be summarized as: “If I do this, what’s in it for me?”
Thorndike’s Law of Effect
Edward L. Thorndike (1874–1949) was one of the first psychologists to study how voluntary
behavior is learned.
He conducted experiments using a puzzle box, where a hungry cat learned to press a lever to
escape and obtain food placed outside the box.
Thorndike observed that the cat took less time to escape after several trials. Based on this, he
formulated the Law of Effect, which states that:
“Responses followed by satisfying consequences are more likely to be repeated, while responses
followed by unpleasant consequences are less likely to occur.”
This principle laid the foundation for what later became operant conditioning, although
Thorndike himself did not use that term.
B. F. Skinner and Operant Conditioning
B. F. Skinner (1904–1990) expanded on Thorndike’s work and formally introduced the term
Operant Conditioning.
Skinner emphasized that psychology should study observable behavior, not internal mental
states.
According to Skinner, voluntary behavior (operant behavior) is learned through the effects of
its consequences.
In his experiments using the Skinner Box, rats learned to press a lever to obtain food. The food
acted as a reinforcer, strengthening the lever-pressing behavior.
Thus, the heart of operant conditioning lies in the effect of consequences on behavior.
, Reinforcement
Reinforcement refers to any event or stimulus that increases the likelihood of a behavior being
repeated.
It “strengthens” the response and plays a vital role in learning.
Types of Reinforcers
1. Primary Reinforcers – Satisfy basic biological needs.
Examples: Food, water, touch.
(e.g., Giving candy to a child for doing homework.)
2. Secondary Reinforcers – Acquire value through association with primary reinforcers.
Examples: Money, grades, praise.
(e.g., Money can buy food or desired items.
Positive and Negative Reinforcement
Both increase the likelihood of a behavior, but in different ways.
Type Description Example
Positive Adding a pleasant stimulus to increase Praising a student for good
Reinforcement behavior performance
Negative Removing an unpleasant stimulus to Fastening a seatbelt to stop a
Reinforcement increase behavior car alarm
Examples
1. Sandeep washes his car to stop his father’s nagging → Negative reinforcement.
2. Rahul talks in a funny voice to get classmates’ attention → Positive reinforcement.
3. Sahil smiles to receive bigger tips → Positive reinforcement.
4. Shweta submits her report on time to avoid a penalty → Negative reinforcement
Schedules of Reinforcement
Skinner also studied how different patterns of reinforcement affect learning speed and strength.
Schedule Description Example Response Pattern
Fixed Interval Reinforcement after a fixed Weekly paycheck, Slow response, increases
(FI) time period exams near reinforcement
Variable Reinforcement after varying Surprise quizzes,
Steady, slow response
Interval (VI) time intervals fishing
Fixed Ratio Reinforcement after a fixed Piecework pay,
High rate, short pauses
(FR) number of responses “buy 10 get 1 free”
Introduction
Operant conditioning is a type of learning in which the strength of a behavior is modified by its
consequences, such as rewards or punishments. It involves voluntary behaviors—actions
performed by choice, unlike reflexive or involuntary responses studied in classical conditioning.
In simple terms, it can be summarized as: “If I do this, what’s in it for me?”
Thorndike’s Law of Effect
Edward L. Thorndike (1874–1949) was one of the first psychologists to study how voluntary
behavior is learned.
He conducted experiments using a puzzle box, where a hungry cat learned to press a lever to
escape and obtain food placed outside the box.
Thorndike observed that the cat took less time to escape after several trials. Based on this, he
formulated the Law of Effect, which states that:
“Responses followed by satisfying consequences are more likely to be repeated, while responses
followed by unpleasant consequences are less likely to occur.”
This principle laid the foundation for what later became operant conditioning, although
Thorndike himself did not use that term.
B. F. Skinner and Operant Conditioning
B. F. Skinner (1904–1990) expanded on Thorndike’s work and formally introduced the term
Operant Conditioning.
Skinner emphasized that psychology should study observable behavior, not internal mental
states.
According to Skinner, voluntary behavior (operant behavior) is learned through the effects of
its consequences.
In his experiments using the Skinner Box, rats learned to press a lever to obtain food. The food
acted as a reinforcer, strengthening the lever-pressing behavior.
Thus, the heart of operant conditioning lies in the effect of consequences on behavior.
, Reinforcement
Reinforcement refers to any event or stimulus that increases the likelihood of a behavior being
repeated.
It “strengthens” the response and plays a vital role in learning.
Types of Reinforcers
1. Primary Reinforcers – Satisfy basic biological needs.
Examples: Food, water, touch.
(e.g., Giving candy to a child for doing homework.)
2. Secondary Reinforcers – Acquire value through association with primary reinforcers.
Examples: Money, grades, praise.
(e.g., Money can buy food or desired items.
Positive and Negative Reinforcement
Both increase the likelihood of a behavior, but in different ways.
Type Description Example
Positive Adding a pleasant stimulus to increase Praising a student for good
Reinforcement behavior performance
Negative Removing an unpleasant stimulus to Fastening a seatbelt to stop a
Reinforcement increase behavior car alarm
Examples
1. Sandeep washes his car to stop his father’s nagging → Negative reinforcement.
2. Rahul talks in a funny voice to get classmates’ attention → Positive reinforcement.
3. Sahil smiles to receive bigger tips → Positive reinforcement.
4. Shweta submits her report on time to avoid a penalty → Negative reinforcement
Schedules of Reinforcement
Skinner also studied how different patterns of reinforcement affect learning speed and strength.
Schedule Description Example Response Pattern
Fixed Interval Reinforcement after a fixed Weekly paycheck, Slow response, increases
(FI) time period exams near reinforcement
Variable Reinforcement after varying Surprise quizzes,
Steady, slow response
Interval (VI) time intervals fishing
Fixed Ratio Reinforcement after a fixed Piecework pay,
High rate, short pauses
(FR) number of responses “buy 10 get 1 free”
