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Notes about Behaviour
Behaviour is valuable only at the right time and appropriate situation
—> Behaviours = context-dependent
Successful behaviour change depends on teaching/learning when and where a behaviour is appropriate
ABC Assessment
Antecedent
Behaviour
Consequence
Antecedent
Events or interactions that happen before the behaviour occurs
Behaviour
Behaviour or sequence which has occurred
Consequence
Events or interactions which happen after the behaviour
Stimuli =
people, objects, and events currently present in immediate
surroundings that activate sense receptors and that can affect behaviour
Any stimulus can be an antecedent or a consequence of a behaviour
These can become cues
Operant behaviour is
always influenced by the environment, including people, places, objects, etc.
Stimulus Discrimination Learning and Stimulus Control
How do we learn to perform certain behaviours at certain times but not others?
Always cues around when a behaviour is reinforced or extinguished à signal when reinforcement is available or no longer provided
Stimulus Control
degree of correlation between a stimulus and subsequent response
Good or Effective stimulus control = High correlation
Types of Controlling Stimuli
SD - Discriminative Stimulus
SΔ - Extinction Stimulus
A stimulus may be simultaneously and SD for one response and an SΔ for another
SΔ -Extinction Stimulus
Response has been reinforced only in the presence of a particular stimulus
Cue that a particular response will pay off
SD - Discriminative Stimulus
Response has been extinguished only in the presence of a particular stimulus
Cue that a particular response will not pay off
Stimulus Discrimination
Process by which we learn to emit a specific behaviour in the presence of some stimuli and not in the presence of other stimuli
Operant Stimulus Discrimination Training
Procedure of reinforcing a response in the presence of an SD and extinguishing that response in the presence of an S∆ —> Effects: stimulus discrimination, good stimulus control
Stimulus Generalization
Responding the same way to a different stimulus
Opposite of stimulus discrimination
Unlearned stimulus generalization due to considerable physical similarity
Likely to perform a behaviour in a new situation if that situation is very similar to situation when behaviour was learned
Learned stimulus generalization involving minimal physical similarity
Have to learn the stimulus class, or concept
Common-element stimulus class
Set of stimuli, all of which have some physical characteristic in common
Conceptual behaviour – emitting appropriate behaviour to all members of a common-element stimulus class, but not those that don't belong to the class
Learned stimulus generalization despite no physical similarity
Stimulus equivalence class is a set of completely dissimilar stimuli which an individual has learned to group or match together or respond to in the same way.
Enduring Effectiveness of Stimulus Discrimination Training
Choose distinct signals
different along more than 1 dimension
stimulus only occurs when response should
grabs attention
Minimize opportunities for error
Maximize the number of trials
Make use of rules: describe contingencies
Contingency =
if then arrangement
Two-term contingency =
Behaviour- Consequence
Three term contingency =
As and Cs of a B
Contingency shaped behaviour =
developed through trial and error
Rule Governed behaviour =
controlled by the statement of the rule
Rule:
describes a situation in which a behaviour will lead to a consequence
Guidelines for Effective Stimulus Discrimination Training
Choose distinct stimuli - SDs and at least one S∆
Select an appropriate reinforcer
Develop the discrimination
Arrange for several reinforced responses in the presence of the SD
Specify rule (SD —> desirable response à reinforcer)
When the SΔ is presented, make the change from the SD very obvious
Wean individual from the program
Perform schedule thinning and plan natural reinforcers
Plan periodic assessments of behaviour to make sure it is occasionally being reinforced and that the desired frequency of the behaviour is being maintained in the presence of the SD
Fading
Gradual change over successive trials of an antecedent stimulus that controls a response so that the response eventually occurs to a partially changed or completely new stimulus
Process of slowly removing prompts after behaviour is established
Reinforce appropriate responses
Dimensions of Stimuli For Fading
Fading occurs along dimensions of stimuli
Dimension – any characteristic of the stimulus that can be measured on some continuum
Fading can occur across specific stimulus dimensions and across changes in general situation or setting
Ex: physical structure of room; number of other people present
Factors Influencing the Effectiveness of Fading
Choosing the final target stimulus =Stimulus that we want to evoke /produce the behaviour at the end of the fading procedure
Choosing the starting stimulus and prompt
Choosing the fading steps
Choosing the final target stimulus =Stimulus that we want to evoke /produce the behaviour at the end of the fading procedure (Factors influencing the effectiveness of fading)
Important to select a stimulus that will maintain responding in natural environment
Choosing the starting stimulus and prompt
Prompt: a supplemental antecedent stimulus provided to increase the likelihood that a desired behaviour will occur, but that is not the final target stimulus to control that behaviour.
Instructor behaviour as prompts:
Physical prompts/physical guidance - touching the learner to guide them appropriately
Gestural prompts - pointing, making motions without touching, etc.
Modeling prompts - demonstrating correct behaviour
Verbal prompts - verbal hints or cues
Environmental alterations as prompts:
Altering the physical environment to evoke desired response
Extra-stimulus vs within-stimulus prompts
Extra-stimulus – something that is added
Within-stimulus – alterations to the SD or S∆ to make them more noticeable and easier to discriminate
Choosing the fading steps
Should be chosen carefully
Need to monitor performance to determine the speed of fading
If student begins making errors, prompts may have been faded too quickly or with too few steps
May need to backtrack
If too many steps introduced or too many prompts provided, learner might become overly dependent on them
Extra stimulus =
something that is added
Within stimulus
alterations to the SD or S∆ to make them more noticeable and easier to discriminate
Gesture prompts =
pointing, making motions without touching, etc.
Modeling prompts =
demonstrating correct behaviour
Verbal Prompts =
verbal hints ot cues
Guidelines for Effective Application of Fading
1.Choose final desired stimulus.
2. Set an appropriate reinforcer.
3. Choose the starting stimulus and fading steps:
a) Specify clearly the conditions under which the desired behaviour now occurs.
b) Specify specific prompts that will evoke the desired behaviour.
c) Specify clearly the dimensions that you will fade to reach the final target stimulus control.
d) Outline the specific fading steps to be followed and the rules for moving from one step to
the next.
4. Put the plan into effect:
a) Present the starting stimulus and reinforce the correct behavior.
b) Across trials, the fading of cues should be so gradual that there are as few errors as
possible. However, if an error occurs, move back to the previous step for several trials
and provide additional prompts.
c) When control by the final target stimulus is obtained, wean the learner from the program.