The definition of sd in behavior modification is Discriminative Stimulus and Stimulation Delta.

The quote states that the discriminativeStimulus is a stimuli in the presence of which a particular response will be reinforced.

We're going to use an anology to describe the discriminative stimuli.

Correct and incorrect answers can be found within any educational programme.A letter discrimination programme where printed cards with different letters on them are placed on the desk in front of a student and the teacher asks the student to "Point to B" is an example.

The card with the letter "B" on it is the correct answer when the teacher asks the student to point it out.

ABA stimuli are the types of cards considered within these cards.There are correct and incorrect stimuli in this ABA programme.

A card with a "B" on it is correct and a card without one is incorrect.

The term Discriminative Stimulus is often shortened into just "SD" and is pronounced as "ess-dee".A Stimulus Delta is shortened into "S" and is pronounced "ess-delta".

The definition of the discriminative stimuli is that they are stimuli in the presence of which a particular response will be reinforced.

When the teacher says "Point to B" if there is a card on the table with a letter "B" on it, then the student's response of selecting this card will lead to reinforcement.

Praise could be the reinforcement.It could be through the delivery of a reinforcer.A sweet.

If you wanted hot water, you would go to wash your hands.Selecting the hot tap will lead to the delivery of reinforcement.

The existence of a particular response that will not be reinforced is referred to as theStimulus Delta.

When the teacher says "Point to B" and there are cards on the table without the letter "B" on them, no reinforcement would be delivered.

When a student gets something wrong, no reinforcement is given because of the fact that the answer is the incorrect one.

If you wanted hot water to wash your hands and you chose the cold water tap, your response will not lead to reinforcement because you didn't get it.

A red card and a blue card are placed on the desk and the student is told to put it with the same colour.

For the first trial, the teacher puts the red and blue cards on the desk and tells the student to put red with red.The child is asked to put blue with blue in the second trial.

Which of the two cards on the desk is the discriminative one?

When the teacher says put red with red, the red card is the correct answer, and the blue card was the incorrect answer.

The blue card is the correct answer when the teacher says put blue with blue.

If the student pointed to the S then their incorrect response would not be reinforced.

Anne is being taught to say hello to one of the other students in the school.Brian is a student.

Whenever the opportunity arises, this programme is run.While Anne is in the playground, Brian is playing with his friends Toby and Liam.

Anne was told to say hello to Brian by the teacher on the playground.In this instance, Brian is now a discriminative stimulus, while Toby and Liam are each a stimulus delta.

The teacher would deliver reinforcement if Anne said hello to Brian.If she said hello to either Toby or Liam, it would be an "incorrect" response.

A discriminativeStimulus does not have to be an educational material that is put on a desk.When the school lunch is over, what happens?

The ringing of the bell has changed.Anne will be praised by her teacher if she returns to her classroom correctly.

There are only some educational programmes where the discriminativeStimulus and the S are defined.When the trial is written out, they are placed into theprompt component.

One situation where the child has to discriminate between different stimuli is described in the two programmes.The numerical amount of each type ofStimulus is defined.

The letter discrimination programme is an example.The prompt component might have the words "1 SD and 1 S" written in it.This tells the teacher who will be running the program to put the correct and incorrect stimuli on the table before asking the child to point to B.

There could be many S, but there would only be one.For example, you might see one or more of the following.The desk could have any number of S on it.

The programme is more difficult when there are more S.You would only start the programme with 1 SD and 1 S.

You can start with a non-exemplar which is like a blank card with the letter "B" on it.