OPERANT CONDITIONING:Negative Rein forcer, Punishment, No reinforcement

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Introduction to Psychology PSY101

Lesson 21

OPERANT CONDITIONING

Type of learning in which a voluntary response becomes stronger or weaker depending on its

positive or negative consequences.

· The organism plays an active role and `operates' on environment to produce the desired

outcome.

Operant conditioning forms an association between a behavior and a consequence.

Consequences have to be immediate, or clearly linked to the behavior. With verbal humans, we can explain

the connection between the consequence and the behavior, even if they are separated in time. For example,

you might tell your friends that you'll buy dinner for them since they helped you move, or a parent might

explain that the child can't go to summer camp because of her bad grades. With very young children,

humans who don't have verbal skills, and animals, you can't explain the connection between the

consequence and the behavior. For the animal, the consequence has to be immediate.

Four Possible Consequences

There are four possible consequences of any behavior:

Something Good can start or be presented

Something Good can end or be taken away

Something Bad can start or be presented

Something Bad can end or be taken away

Applying these terms to the Four Possible Consequences

· Something Good can start or be presented: behavior increases = Positive Reinforcement

(R+).

· Something Good can end or be taken away: behavior decreases = Negative Punishment

(P-).

· Something Bad can start or be presented: behavior decreases = Positive Punishment

(P+).

· Something Bad can end or be taken away, so behavior increases = Negative

Reinforcement (R-).

Thorndike's Law of Effect

Any response leading to an outcome that is satisfying for the organism is likely to be repeated; a response

leading to an outcome that is not satisfying is not likely to be repeated.

Association by Contiguity

· The organism forms an association or connection between the response and its

consequences. For it to be effective, the response and the outcome have to be closely

linked__ both in time and space.

· The theory drew attention towards the significance of reward and punishment in learning

new behavior.

Criticism against Thorndike's Approach

It was not clear about what exactly `satisfying' meant

Some points to ponder

Have you ever thought?

Why do teachers give silver and gold stars on children's workbooks?

Why do horses gallop faster when the rider whips them?

Why do parents allow children to watch cartoons when they finish their homework in time?

Why do we find surprise gifts in the packs of detergents?

Why do employees who earn profit to the organization get a bonus at the end of year? And,

Why do children show temper tantrums in the presence of guests even when they know the

mother is going to scold and punish?

The answers to all these questions can be found in the operant conditioning approach

Burrhus Frederic Skinner: 1904-1990

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Introduction to Psychology PSY101

· American Psychologist and the founder of Operant Conditioning.

· His theory is somewhat similar to Thorndike's, but it was actually Watson who impressed him.

The Typical procedure in Skinner's Operant conditioning experiments

· A special apparatus usually known as skinner's box is used.

· Laboratory animals learn to press a lever so that food is delivered to them.

· The environment is controlled.

· The animal operates on the environment, and as a result of its behavior it may be rewarded or

punished. Food is the reward.

· The consequence determines if the response will be repeated or not.

Consequences of Behavior

Positive

Behavior

consequence

Negative

consequence

Consequences of Behavior; Reinforcement

Reinforcement is used for increasing the probability that the preceding behavior will be repeated

through a stimulus. Also some consequences may deter the re occurrence of behavior. Reinforcement can

be in the form of:

Positive reinforcement

Negative reinforcement

Other consequences may be:

· Punishment

· No reinforcement

Reinforcer

·The stimulus that increases the probability of repetition or re occurrence of a behavior

·It can be material as well a non material in nature.

Positive Reinforcer/ Reward

It is a stimulus whose introduction brings about an increase in the preceding response.

CONSEQUENCES OF BEHAVIOR AND THEIR IMPACT

Positive

Response

reinforcement

Response

will be

repeated

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Introduction to Psychology PSY101

Negative Rein forcer

·A stimulus whose removal reinforces and leads to a higher likelihood that the response bringing about this

removal will be repeated: in simpler terms it means repeating a behavior in order to get rid of a negative

stimulus.

Negative

Response

Reinforcement

Response

will be

Repeated

Punishment

Punishment is an unpleasant or painful stimulus whose introduction following a certain behavior decreases

the likelihood that the behavior will occur again.

Response

Punishment

Response

will not be

No reinforcement

Repeated

This also deters or stops a behavior from being repeated.

Response

Reinforcement

Response

will not be

repeated

Schedules of Reinforcement

·The procedures involving specific frequency and timing of

reinforcing a desired behavior

Schedules of Reinforcement

SCHEDULES OF REINFORCEMENT

Continuous Versus Partial Schedules

Continuous Schedule

Reinforcing the behavior every time it is repeated.

Continuous

Partial

Partial Schedule

The behavior is reinforced but not every time.

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PARTIAL SCHEDULES OF REINFORCEMENT

Fixed

Ratio

Interval

Variable

Interval

Ratio

PARTIAL SCHEDULES OF REINFORCEMENT CONSIDERING THE FREQUENCY OR

NUMBER OF RESPONSES

Fixed Ratio Schedule

The organism is reinforced only after a specific number of

responses is made e.g. salary after 7 days.

Variable

Fixed

Variable Ratio Schedule

Ratio

The organism is reinforced after a varying number of

responses is made (not a fixed number) e.g. surprise

bonus.

PARTIAL SCHEDULES OF REINFORCEMENT CONSIDERING THE PERIOD OR

AMOUNT OF TIME

Fixed- Interval Schedule

The organism is reinforced after pre fixed time intervals e.g.

giving students a candy every two days.

Variable- Interval Schedule

Variable

Fixed

The organism is reinforced after around an average time

Interval

interval instead of fixed ones e.g. at times giving 2 candies

after 6days, and one after two days.

Remember!!! Immediate and appropriate reinforcement is essential for learning.

Consistency is the golden rule; follow the pattern of reinforcement regularly and never let the organism

feel that his/her/its behavior is not been observed and the progress not followed.

The most effective schedule of reinforcement is the variable-interval schedule.

Shaping

Successive approximations of a required/-desired response are reinforced until that response is fully

learnt:

In the beginning each and every success is reinforced with a reward, no matter how small the success.

Once the desired response is learnt the reinforcer immediately follows it, every time it happens.

Once learnt the behavior, in many cases, the organism may not need reinforcement since many

behaviors are self-reinforcing e.g. learning to play a musical instrument.

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Stages in Shaping

Acquisition: Initially the response rate following reinforcement may be slow but at one stage it increases to

the maximum-----acquisition.

Extinction: If reinforcement is withheld the response rate decreases and finally no response is shown------

extinction.

Shaping Can Best Be Used For

·Learning alphabets, vocabulary, mathematical

tables, or a new language.

·Learning to play a musical Instrument.

·Appropriate classroom behavior.

·Training mentally handicapped children.

Behavior Modification

·A therapeutic/intervention strategy used for modifying behavior in such a manner that the frequency of

desired behavior is increased up to the optimal level, and the frequency of undesired behavior is brought

down to the minimum...or to extinction level.

·The intervention is based upon the operant principles of learning.

Steps in Behavior Modification

·Identification of goals in terms of target behavior.

·Recording the preliminary/background information concerning the behavior in question.

·Designing the intervention, issues involved, and deciding its components.

·Implementation of the planned program as well as careful monitoring.

·Recording the events, progress, and problems during the implementation phase.

·Evaluating the program and making alterations if required.

Token Economy/ Token System:

·The person is rewarded with some form of a token every time a desired behavior is exhibited.

·The token can be play money/token or a chip representing money; it can be the silver or gold stars earned

by the child; parents can give different colored paper tokens for good behavior.

·After a specific number of tokens have been earned, they can be exchanged for something desirable.

Contingency Contracting

·A written contract is held between the client and the therapist, specifying all goal-behaviors as well as

consequences; parents and teachers can also use it.

·The contract is followed strictly no matter if the consequences of behavior are negative, and the client may

in fact dislike them; the purpose is to promote target behavior e.g. if an over-eater fails to refrain from

confectionary throughout the week, he will have to send a donation cheque for drinks in a marathon; the

cheques are prepared at the beginning of the program.

Who is Operant Conditioning Most Effective with?

·Children

·Animals

·Mentally handicapped

Applications of Operant Conditioning in Real Life Situations

· Child rearing.

· Classroom management.

· Teaching of skills.

· Animal taming.

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Advertising.

Psychological intervention and Psycho- therapy: behavior modification, assertiveness training, and

token economy.

Child Rearing

Things to remember:

·If you make rules, stick to them; if you can not stick to them then don't make rules.

·Provide immediate reinforcement as promised.

·Consider no reinforcement along with positive/ negative reinforcement and punishment.

Classroom Management

·In different situations positive/negative reinforcement, punishment, and no reinforcement work.

·The same rules apply as is in child rearing.

Significant results in case of:

· Discipline

· Memorization e.g. learning tables

· Vocabulary

· New skills

Shaping procedures are of special help in classroom settings.

Organizational Behavior

·Fixed wages after a fixed period or variable wages depending on performance have different effects in

different situations.

Psychotherapy/care for special needs/health psychology

·More effective when combined with cognitive approach for:

·Children with special needs.

·Quitting smoking or alcohol.

·Weight reduction programs.

·Compliance with medical advice.

How do many youngsters start taking drugs?

·Operant conditioning principles operate here too. What positively reinforces addictive behavior can be

the:

·Free offers.

·The subsequent effect.

·Peer acceptance.

Weight Reduction Programs

Following can be of help:

·Contracts

·Allowing one's self to eat favorite food once a week

Learning Healthy Lifestyles

Acquiring better skills for improving and enhancing health can be made easier by using learning techniques.

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