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Discrimination . Ch 12. TODAY. DISCRIMINATION TRAINING STIMULUS CONTROL DIFFERENCE BETWEEN DIFFERENTIAL REINFORCEMENT AND DISCRIMINATION TRAINING PROCEDURES. Reinforcement. After. Before. Behavior. Differential Reinforcement of 2 Response Classes. Reinforcement. Behavior

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Discrimination

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Discrimination l.jpg

Discrimination

Ch 12


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TODAY

  • DISCRIMINATION TRAINING

  • STIMULUS CONTROL

  • DIFFERENCE BETWEEN DIFFERENTIAL REINFORCEMENT AND DISCRIMINATION TRAINING PROCEDURES


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Reinforcement

After

Before

Behavior


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Differential Reinforcement

of 2 Response Classes

Reinforcement

Behavior

John hits ball with some skill

After

John receive praise

Before

John has no praise

Behavior

John hits ball with no skill

After

John receives no praise

Extinction


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OPEN


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NO OPEN SIGN


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OPEN

What happens when the open sign is present?


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Reinforcement

OPEN

After

Door opens

Before

No open door

Behavior

Push on door


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Reinforcement

OPEN

After

No open door

Before

No open door

Behavior

Push on door

What if the store is closed?


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Reinforcement-Based Discrimination

SD

OPEN SIGN

After

Behavior

Before

SD

After

NO OPEN SIGN


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Reinforcement-Based Discrimination

SD

OPEN SIGN

After

Open door

Behavior

Push on door

Before

No open door

After

No open door

SD

NO OPEN SIGN


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Reinforcement-Based Discrimination

SD

OPEN SIGN

After

Open door

Behavior

Push on door

Before

No open door

After

No open door

SD

“CLOSED” SIGN


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Discriminative Stimulus (SD)

OPEN SIGN

  • A stimulus in the presence of which a particular response will be reinforced

  • Examples– Brelandless target, “open” sign, smile on a face


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SD

OPEN


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S-delta (SD)

  • A stimulus in the presence of which a particular response will not be reinforced


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SD

“Closed” sign


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Reinforcement-Based Discrimination

SD

Brelandlesss target

After

Chicken has food

Behavior

Chicken pulls the trigger

Before

Chicken has no food

After

Chicken has no food

SD

Breland


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Reinforcement-Based Discrimination

SD

Written word “shoe”

After

Student has n + 1 tokens

Behavior

Student says “shoe”

Before

Student has n tokens

SD

NOT written word “shoe”

After

Student has n tokens


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Reinforcement-Based Discrimination 

After

Child has cookie

SD

Behavior

Child asks for cookie

Before

Child has no cookie

After

Child has no cookie

SD

No 


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Reinforcement-Based Discrimination

After

Student has answer

SD

Behavior

Student asks questions

Before

Student has no answer

After

Student has no answer

SD


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Discrimination Training Procedure

  • Reinforcing a response in the presence of one stimulus and extinguishing it in the presence of another stimulus.

SD


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Discrimination Training Procedure

  • Reinforcing a response in the presence of one stimulus and extinguishing it in the presence of another stimulus.

SD


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Discrimination Training Procedure

  • Reinforcing a response in the presence of one stimulus and extinguishing it in the presence of another stimulus.

SD


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Discrimination Training Procedure

  • Reinforcing a response in the presence of one stimulus and extinguishing it in the presence of another stimulus.

SD


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Discrimination Training Procedure

  • Reinforcing a response in the presence of one stimulus and extinguishing it in the presence of another stimulus.

SD


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Stimulus discrimination(stimulus control)

  • The occurrence of a response more frequently in the presence of one stimulus than in the presence of another, usually as a result of a discrimination training procedure

SD


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Discrimination training vs. Response Differentiation (differential reinforcement procedure)

  • How are these different

  • EXAMPLE: lever pressing by a water deprived mouse


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Differential Reinforcement vs. Stimulus Discrimination


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No differential reinforcement and no stimulus discrimination

  • Does not matter if light is off or if force is weak, give water reinforcer for every lever press


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Reinforcement

After

Rudolph has water

Before

Rudolph has no water

Behavior

Rudolph presses lever


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Differential Reinforcement vs. Stimulus Discrimination


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Differential ReinforcementWhat matters?

  • Only the force

  • Light off does not matter

  • If presses with 20g of force, the water reinforcer is delivered


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Differential Reinforcement

of 2 Response Classes

Reinforcement

Behavior

Rudolph used 20 grams of force

After

Rudolph has water

Before

Rudolph has no water

Behavior

Rudolph uses < 20g of force

After

Rudolph has no water

Extinction


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Differential Reinforcement vs. Stimulus Discrimination


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DiscriminationWhat matters?

  • Only if light is on, even if force is weak, if presses lever, the water reinforcer is delivered


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Reinforcement-Based Discrimination

SD

After

Rudolph has water

Before

Rudolph has no water

Behavior

Rudolph presses lever

After

Rudolph has no water

SD


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Discriminated Reinforcement

SD

After

Before

Behavior

M270 presses the lever

After

SD


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Discriminated Reinforcement

SD

Light on

After

Food

Before

No food

Behavior

M270 presses the lever

After

No food

SD

Light off


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Discriminated Reinforcement

SD

Light on

After

Food

Before

No food

Behavior

M270 presses the lever

After

No food

Establishing Operation:

Food deprivation

SD

Light off


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Discriminated Reinforcement

SD

Mom smiling

After

Cookie

Before

No cookie

Behavior

Joe asks for cookie

After

No cookie

SD

Mom frowning


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Discrimination and Verbal Behavior

  • A discrimination training procedure can be used to establish correct verbal responses

    • Correct color naming


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Verbal Behavior

  • Tacts – naming or labeling


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Tact Contingency

SD

Red car

After

Before

Child has no snack

Behavior

Child says, “this is a red car”

After

SD

Green car


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Verbal Behavior

  • Mand – a request that is reinforced by receiving what has been requested


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Incidental teaching

  • A teacher requires that a student emit the proper form of a request before reinforcing that request, in the student’s regular environment.


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Mand Contingency

SD

Red car

After

Before

Child has no red car

Behavior

Child asks, “May I have the red car?”

After

SD

Green car


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Prompt

  • A supplemental stimulus that raises the probability of a correct response.

  • Types of prompts

    • Verbal instructions

    • Modeling

    • Physical guidance


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Undiscriminated reinforcement contingencyVS.Discriminated reinforcement contingency


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Undiscriminated reinforcement contingency

  • There is no sdee associated with the reinforcement contingency


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Discriminated reinforcement contingency

  • The reinforcement contingency is in operation only when the sdee is present, not when the sdelta is present.

  • If a response is never reinforced, that is plain old extinction.


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TESTS, pg 225

  • Criteria for diagramming discriminated contingencies

    • Sdelta contingency test

    • Same before condition test

    • Response test

    • Extinction/recovery test

    • Operandum test

    • Different before condition test


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