Types of Prompts
Response prompts
Stimulus prompts
Prompts
Stimulus or event added to the S^D
Increase the likelihood correct behaviour will occur, resulting in S^R
Always provide S^D first
Provide in presence of S^D before or during a response
Used during discrimination training
Designed to be faded
Response Prompts
Evokes correct response in presence of the S^D by using behaviour of person
- verbal
- gesture
- model
- physical
Stimulus Prompts
Evokes correct response in presence of S^D
S^D changed or enhanced
- within-stimulus
- extrastimulus
Transfer of Stimulus Control
Bring response under sole stimulus control of S^D
Eliminate prompts
- stimulus fading
- prompt fading
- prompt delay
Stimulus Fading
Prompt removed gradually until S^D alone controls behaviour
Prompt Fading
Response prompt removed gradually until S^D alone controls response
Prompt Delay
Time delay between S^D and prompt
Constant time delay (0s, 7s, 7s, 7s): better for advanced learners since more opportunities to respond independently
Progressive time delay (0s, 3s, 5s, 7s): better for early learners, avoid practicing errors, and prevent problem behaviour with extinction
System of Least Prompts
Least to most prompts
Better for advanced learners
Allows for self correction and independence
May be less intrusive due to fewer prompts
Guidelines for Prompting and Fading
Verbal Behaviour
Behavioural analysis of “language”
Behaviour reinforced through mediation of another person
Does not mean “vocal”
Elementary Verbal Operants
Mand
Tact
Echoic
Intraverbal
Mand
Under control of an EO and specifies S^R
A “request”
Tact
Under control of a nonverbal stimulus and generalized S^R
A “label”
Echoic
Under control of a verbal stimulus and generalized S^R
Repeating a word
Intraverbal
Under control of a verbal stimulus and generalized S^R
Answering questions
Behavioural Chain
Stimulus-response (S-R) Chain
Many behaviours together in a sequence
Results of each S-R component is S^D for next response
Task Analysis
Breakdown of a complex behaviour into S-R components
Designing a Task Analysis
Observe a person and record each component
Ask an expert
Perform the task yourself
Chaining Procedures
Forward chaining
Backward chaining
Total task presentation
Forward Chaining
First step -> Teach first S^R component (prompt)
Reinforce
Next, 1st component + 2nd component, then S^R+… and so on
Backward chaining
First step -> Teach last S-R component (prompt_
Reinforce
Then second last step and so on
Total Task Presentation
Present entire S-R chain in each training trial
Prompt throughout
Reinforce at end of chain
Graduated guidance (common prompt used)
- hand over hand
- fade to shadow
Used for less complex chains and higher-ability learners
Other Strategies
Written task analysis
Picture prompts
Video modelling
Self-Instructions