Section 8: Behavior Change Procedures Flashcards
Premack Principle
(Grandma’s Law; Relativity Theory of Reinforcement)
- a principle that states that making the opportunity to engage in a high probability behavior contingent upon the occurrence of a low probability behavior
- first then statment
Response Deprivation Hypothesis (RDH)
- built on the premack principle
- a model for predicting whether contingent access to one behavior will function as reinforcement for engaging in another behavior based on wehther access to the contingent behavior represents a restriction of the activity compared to baseline
- restricting access to the behavior creates deprivation that serves as an EO, which makes the restricked behavior a very strong form of reinforcement
- Ex. restrict watching TV to reinforce the low probability behavior of doing academics
Imitation
F MIC
- four behavior environment relations that functionally define imitation
- Formal Similarity
- model and behavior must have formal similarity- same sense mode
- Model
- the stimulus that is presented in an effort to evoke imitative behavior
- Immediacy
- an imitative behavior must immediately follow the model
- “imitation” may occur at later times, but this is not true imitation
- an imitative behavior must immediately follow the model
- Controlled Relation
- the model must be the controlling variable (SD) for the imitative behavior
- best evidenced when the model is novel and still evokes an imitation–GENERALIZED IMITATION
- the model must be the controlling variable (SD) for the imitative behavior
- Formal Similarity
2 Types of Models
- Planned Models- prearranged antecedent stimuli that help learners acquire new skills
- Unplanned Models- occur in everyday social interactions
Imitation Training - 5 Steps
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Assess and teach any prerequisite skills for imitation training
- attending skills
- gross and fine motor skills
- if challenging behaviors interfere with teaching, must address them first
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Select models for training
- choose about 25 behaviors (including gross and fine motor, movement of body parts, and manipulation of objects)
- present one model at a time before presenting more complex sequences
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Pretest
- test what the learner can already imitate
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Sequence models for training
- using pretest results, arrange the models from least to most difficult
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Implement imitation training
- Pre Assessment- assess the learner’s current performance level to determine progress
- Training- repeatedly present the models used in pre assessment
- Post Assessment- assesses how well the learner performs previously and recently learned behaviors
- Probes for Imitative Behavior- probes assess if the learner is developing an imitative response
Guidelines for Imitation Training
- short 10 to 15 minutes a couple of times a day
- reinforce both prompted and independent imitative responses
- pair verbal praise and attention with tangible reinforcers
- fade out prompts
Shaping
- a process involving systematically and differentially reinforcing successive approximations to a terminal behavior
- Differential Reinforcement- reinforcing those responses within a response class that meet a specific criterion along some dimension (e.g. frequency, magnitude, etc) and placing all over responses in the class on extinction
- Successive Approximations- the sequence of new response classes that emerge during the shaping process as a result of differential reinforcement. Each successive approximation is closer in form to the terminal behavior than the response class it replaces
- shaping teaches novel behaviors
- clicker training is an application of shaping
Response Differentiation
- a behavior change produced by differential reinforcement
- reinforced members of the current response class occur with greater frequency and unreinforced members occur less frequently (because they are on extinction)
- overall result = a new response class
2 Types of Shaping Methods
AW
- Shaping Across Response Topographies
- topography of bheavior changes during shaping
- behaviors are still members of the same response class
- ex. speech therapist teaching novel vocalizations to an individual with no vocal abilities
- Shaping Within Response Topographies
- topography of behavior remains constant
- another measureable dimension of behavior is changed (e.g. duration of the behavior)
- ex. duration of time spent practicing piano increased via shaping
Shaping vs. Fading
- both change behavior gradually
- shaping by changing response requirements
- fading by changing antecedent stimuli
9 Guidelines for Shaping
- Assess Terminal Behavior and Available Resources
- Select the Terminal Behavior
- Determine Criterion for Sucess - specify accuracy, speed, duration, magnitude, etc of the terminal behavior
- Analyze the Response Class - identify the approximations that might be emitted during shaping
- Identify the First Behavior to Reinforce - some degree of the behavior should already be occuring in the learner’s repertoire–the behavior chosen should be a member of the targeted response class
- Eliminate Interfering and Extraneous Stimuli
- Proceed in Gradual Stages
- Limit the Number of Approximations at Each Level - if too many trials occur at a certain approximation, the behavior may become too firmly established
- Continue Reinforcement When the Terminal Behavior is Achieved- if you don’t you may lose the terminal behavior
Behavior Chain
- A specific sequence of discrete responses, each associated with a particular stimulus conditions, where each response and the associated stimulus condition serve as an individual component of the chain
- when the components are linked together, they produce a terminal outcome
- each response in a chain produce a stimulus change that simultaneously serves two functions:
- a conditioned reinforcer for the response that produced it and
- an SD for the next response in the chain
- an exception to the dual function is the first and last responses; these serve as either an SD or a conditioned reinforcer
- Ex. diailing a phone number
3 Important Characteristics of a Behavior Chain
- Performance of a specific set of discrete responses (each response has a clear beginning and end)
- The performance of each response changes the environment in such a way that it produced conditioned reinforcement for the preceding response and an SD for the next response
- The response in the chain must be completed in the correct order and usually close in time
Behavior Chain with a Limited Hold
- the chain must be performed correctly and within a certain time limit
- accuracy and rate are essential dimensions to limited holds
- Ex. entering you SS # when prompted by an automated system–if you take too much time, it records an incomplete and wrong number
Benefits of Chaining
- increases independent living skills so that individuals can function more independently in society
- increases an individual’s current behavioral repertoire
- can be combined with other strategies in a treatment package to teach complicated repertoires
Task Analysis
- required to implement the chaining procedure
- breaking complex skills into smaller, teachable units, the product of which is a series of sequentially ordered steps
- individualized to the person according to age, skill level, disability, and prior experience
3 Chaining Steps
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Create and Confirm the Task Analysis
- to determine the sequence of behaviors that re necessary and sufficient to complete a given task efficiently
- identify the SDs and response topographies
- the individual must be able to discriminate under which condition a given response should be performed
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3 Methods
- observe a competent individual perform the task
- consult with experts or persons skilled in performing the task
- perform the task yourself
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Assess Baseline Level of Mastered Steps
- Two Methods
- Single Opportunity Method
- Multiple Opportunity Method
- Two Methods
- Decide on Behaving Chaining Method/Procedure
Single Opportunity Method
(one of two methods to Assess Baseline Level of Mastered Steps)
- assesses an individual’s ability to perform each behavior in the task analysis in correct sequence
- +/- for each step
- once they score a -, all subsequent steps are recorded incorrect
- more conservative of the two methods
- provides less information once instruction is initiated
- reduces the likelihood of learning taking place during the assessment
Multiple Opportunity Method
(one of two methods to Assess Baseline Level of Mastered Steps)
- evaluates the individual’s baseline level of mastery across all behaviors in the task analysis
- if a step is performed incorrectly, out of sequence, or the time limit for the step is exceeded, the teacher completes that step for the individual and then prompts the learner to do the next step
- each step performed correctly is scored as a correct response even if the previous step was incorrect
- provides more information than single opportunity but increase the likelihood that learning will take place during the assessment
4 Behavior Chaining Methods
- Forward Chaining
- Total Task Chaining
- Backward Chaining
- Backward Chaining with Leap Aheads
Forward Chaining
(one of the 4 Behavior Chaining Methods)
- behaviors identified in the task analysis are taught in their naturally occuring order
- each step must be mastered in sequential order
- reinforcement is provided after correctly completing the targeted training step and the steps previous to it
Total Task Chaining
(one of the 4 Behavior Chaining Methods)
(Total Task Presentation; Whole Task Method; Concurrent Chaining)
- a procedure in which the learner completes every step in the TA during every session
- technically considered a variation of forward chaining
- each step the learner is unable to perform independently is trained until they are able to perform all of the reponses in the correct order
- if necessary graduated guidance or physical prompting is used
Backward Chaining
(one of the 4 Behavior Chaining Methods)
- a procedure in which the teacher compeletes all the initial steps except for the last step which the learner is taught to complete
- Advantages
- when beginning, the first behavior the learner independently performs produces the terminal reinforcement (e.g. a shoe that is tied)
- on each trial, the individual comes into contact with the terminal reinforcer for the chain
- Disadvantages
- the potential passive prompted participation of the learner in earlier steps
- can slow down the learning process if the learner has already mastered some steps in the chain
Backward Chaining with Leap Aheads
(one of the 4 Behavior Chaining Methods)
- same protocol as the backward chain, but not every step in the TA is trained
- after a probe, determine the steps that are already in repertoire, and when teaching, you can LEAP AHEAD over that step instead of going in backwards order for every step
Interrupting and Breaking Behavior Chains
(Unchaining; Disrupting a Chain; Unlinking a Chain)
- a method designed to lessen behavior by unlinking one element of the chain from the next so that one link no longer serves as a discriminative stimulus for the next link, nor as a conditioned reinforcer for the prior link
- can occur with desirable and undesirable behaviors
- Inappropriate chains can be broken by determining the initial SD and substituting another SD for an alternate behavior or by extending the chain and building in time delays
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BEHAVIOR CHAIN INTERRUPTION STRATEGY (BCIS)
- Relies on a learner’s ability to perform the critical steps of the chain independently, but the chain is interrupted at a predetermined step so that another behavior can be emitted
- effective strategy for increasing speech and language abilities
- ex. learner is completing a TA for making toast but teacher removes the toaster thereby interrupting the chain and making the learner use language to ask for the toaster
Breaking an Inappropriate Chain - 5 Steps
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Reexamine the SD and the response
- is the original chain of associated evoked reponses arbitrary, based primarily in expert opinion, time and motion studies, and practical effciency?
- ex. learner was taught to clear dishes. learner scrapes the dishes clean at the table in a clearing bin vs. at the sink
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Determine whether similar SDs cue different responses
- rearrage the SDs to make the adjustment
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Analyze the natural setting to identify relevant and irrelevant SDs
- training should include helping the learner discriminate between the relevant components of a stimulus from the irrelevant
- ex. for clearing dishes, the number of place settings or the location of the meal are irrelevant, however an empty table and the presence of dishes is relevant
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Determine whether SDs in the natural setting differ from training SDs
- some variations cannot be taught during the training ahses, therefore final training trials should also be conducted in the natural setting where the behavior is expected to occur
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Identify the presence of novel stimuli in the setting
- the learner should be taught to identify novel stimuli along with the other SDs in the environment
- ex. in learning to clear dishes away in a restaurant, the presence of customers may cause the chain to be erformed out of sequence or a coworker may give contradictory instructions
5 Factors Affecting the Performance of a Behavior Chain
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completeness of the task analysis
- elements of the chain are not sequenced appropriately
- corresponding SDs are not identified for each response
- length or complexity of the chain
- schedule of reinforcement
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stimulus variation
- if possible, introduce all possible variations of an SD
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response variation
- when stimulus variation occurs, it causes response variation. this may require the retraining of responses
Differential Reinforcement
- a procedure in which involves two parts
- Reinforcement contingent on
- the occurence of a behavior other than the challenging behavior
- challenging behavior occuring at a reduced rate
- Withholding Reinforcement (EXT) for the challenging behavior
- Reinforcement contingent on
6 Types of Differential Reinforcement
(HI LOAD)
- Differential Reinforcement of High Rates of Responding (DRH)
- Differential Reinforcement of Incompatible Behavior (DRI)
- Differential Reinforcement of Low Rates of Responding (DRL)
- Differential Reinforcement of Other Behavior (DRO)
- Differential Reinforcement of Alternative Behavior (DRA)
- Differential Reinforcement of Diminishing Rates of Responding (DRD)
Differential Reinforcement of Incompatible Behavior
DRI
- behavior cannot be emitted simultaneously with the challenging behavior
- the behavior being differentialy reinforced and the behavior on EXT are mutually exclusive response classes
- technically, DRI is a subtype of DRA