Lecture 4 - Stimulus control + discrimination Flashcards
What is an antecedent?
Events or stimuli that precede a particular behaviour. They precede an operant response.
Factors of antecedents
Antecedents can involve any of our senses
- touch, taste, smell, hear, see
Antecedents can also differ from person to person.
- I.e the antecedent of the smell of coffee may make Sav go into a coffee shop but not Bea as Bea does not drink coffee
Antecedents can be covert or overt
- I.e experiencing greif which leads to me internally feeling sad(covert), may have a specific impact on a certain behaviour.
COVERT = visible to only 1 person (internal state)
OVERT = visible to everyone
Antecedents can be distal or immediate
DISTAL = happened in the past but still has an effect
IMMEDIATE = current
What is stimulus control?
A behaviour is said to be under stimulus control
when there is an increased probability that the behaviour will occur in the prescence of a specific antecedent stimulus (Dinsmoor, 1995) - the extent to which a given stimulus determines the probability that a conditioned response will occur
Example of stimulus control
- opening the door on when hearing the doorbell .
- answering a call when the phone rings.
What happens if an antecedent is controlling our behaviour strongly?
Our behaviour will occur in response to that antecedent consistently. Everytime the cue is present (antecedent), a particular behaviour will follow.
The stronger that particular antecedent controls that behaviour, the more likely that the behaviour always occurs in prescence of that cue.
What are the two important terms when we talk about stimulus control?
- Discriminative Stimulus
- Stimulus Delta
What is Discriminative Stimulus?
The SD
- This is the antecedent stimulus that is present when a behaviour is reinforced
- the stimulus which signals the availability of reinforcers
E.g., When the traffic light turns green, drivers keep their car going forward, but not when the light turns red
Give me an example of an SD
- Green traffic light (for the behaviour of driving)
- Phone ringing (for the behaviour of picking up the phone)
What is the sequence of the dicriminative stimulus?
SD-> Behaviour -> SR
(SR = reinforcement)
What is the Stimulus Delta?
Stimulus in the prescence of which a behaviour is not reinforced
When the antecedent is present, if the behaviour was to occur, there would be no reinforcement that follows that behaviour
A stimulus in the environment that signals the non-availability of reinforcement
For example, you can normally ask questions in class but if teacher says please hold your questions until the end of the lesson, by raising your hand you will not be reinforced for this
Give me an example of S^
Picking up the phone and putting it to my ear only gets reinforced when the phone is ringing. So if i want to speak to someone, the phone needs to ring.
The reinforcemnet of speaking to someone isnt present if the phone isnt ringing
What is the sequence of the S^?
S^ -> Behaviour -> No SR
Another word for S^
Discriminative stimulus for punishment = stimulus Delta
S^ and its link to extinction and punishment
in the presence of S^, a behaviour occurs, there is no reinforcement available for the behaviour. This process could either be an extinction behaviour OR a punishment procedure (depends on consequence)
Stimulus control in every day life
Stimulus control plays a fundamental role in everyday life because it teaches us what behaviours will work depending on the context/circumstances in which they occur.