section 8 - B change procedure Flashcards
Premack principle by David Premack 1959
Grandma’s law
Relativity Theory of Reinforcement
- make the opportunity to engage in a HIGH-probability behavior contingent on the occurrence of LOW-probability behavior will function as a R for the low-probability behavior
e.g. first (low) then (high)
when (low), you can (high)
Response deprivation hypothesis (RDH)
by Timberlake & Allison 1974
- built in Premack principle
- a model for predicting whether contingent access to 1 B will function as R for engaging in another B based on whether access to the contingent B represents a restriction of the activity compared to baseline
- restrict access to the B creates deprivation that serves as EO
imitation
4 B-environment relations that functionally define imitation
1. formal similarity: physically look alike & same sense mode
- model: the stimulus that is presented in an effort to evoke the imitative B
- model=stimulus
- imitation=B - immediacy critical: an imitation B must immediately follow the model within a few seconds
- controlled relation: MODEL must be the controlling variable for the imitative B
- model=Sd for the imitative B
2 types of models
- planned models: pre-arranged ANTECEDENT STIMULI
e. g video models - unplanned models: occur in everyday social interactions
imitation training
- teach individual to do what the model does
- some individuals with diabilitites need to learn imitation skills
5 steps of imitation training by Striefel
- access & teach any prerequisite skills for imitation training
- attending skills
- gross & fine motor skills needed
- reduce or eliminate challenging Bx - select models for training
- choose 25 Bx as models, including gross & fine motor, movement of body parts, manipulation of objects
- present 1 model at a time; present complex sequences late - pretest
- assess the individual’s ability to imitate any models already - sequence models for training
- based on pretest, models are arranged from easiest to hardist - implement imitation training
- pre-assessment: access current performance level & determine progress in learning to respond to a model
- training: T repeatedly presents the models used in pre-assessment
- postassessment: assess performance in previously & currently learned Bx
- probes for imitative B: assess if the individual is developing an imitative repertoire
guidelines for imitation training
- keep training sessions active, short (10-15 mins, a couple of times a day)
- R both prompted & imitative responses
- pair verbal praise & attention with tangible R
- if progress breaks down, back up & move ahead slowly
- record data
- fade out prompts
shaping
- systematically & differentially R successive approximations to a terminal B
- differential R: R responses within a RESPONSE CLASS that meet a specific criterion along some dimension (e.g. freq, magnitude) & placing all other responses in the class on EXTINCTION
- successive approximations: 1) the sequence of NEW RESPONSE CLASSES that emerge during the shaping process as a result of differential R; 2) each successive approximation is closer in the form to the terminal B than the response class it replaces
- teach NOVEL Bx
- clicker training is an application of shaping
response differentiation
- B change produced by differential R
- reinforced members of the current response class occur with GREATER frequency & unreinforced members occur LESS frequently as they are on extinction
- overall result = a new response class
2 types of shaping method
- across response topographies
- topography changes during shaping
- Bx are members of the SAME RESPONSE CLASS - within response topographies
- topography constant
- another measurable dimension of B is changed, e.g time
shaping vs. fading
- both change B gradually
- shaping changes response requirements
- fading changes ANTECEDENT stimuli
guidelines for shaping
- access terminal B & available resources
- select terminal B
- determine the criterion for success
- specify accuracy, speed, duration, magnitude etc. of the terminal B
- analyze the response class
- identify the approximations that might emit during shaping - identify the 1st B to R
- some degree of the B should already be occurring in the individual’s repertoire
- the B chosen should be a member of the targeted RESPONSE CLASS - eliminate interfering & extraneous stimuli
- proceed in gradual stages
- **limit the # of approximations at each level
- if too many trials occur at a certain approximation, the B may become too firmly established - continue R when the terminal B is achieved
behavior chain
- a specific sequence of discrete responses, each associated with a particular stimulus condition, where each response & the associated stimulus condition serve as an individual component of the chain
- when the components are linked tgt –> produce a terminal outcome
- each response in the chain (except the 1st & last response) produce a STIMULUS CHANGE that simultaneously serves 2 functions
1. conditioned +ve R
2. Sd for the next response in the chain
e.g. dial a phone number: press each single #
3 important characteristics of a B chain
- performance of a specific set of DISCRETE responses: each response has a clear beginning & end
- the performance of each response produces 2 functions
- the response in the chain must be completed in the correct order
behavior chain with limited hold (LM)
- must be completed within a certain time
- ACCURACY & RATE are essential dimensions
behavior chain vs. chaining
- B chain is a specific sequence of Bx that lead to R
- chaining: various methods for linking specific sequences of STIMULI & RESPONSES to form NEW PERFORMANCES
benefits of chaining
- increases independent living skills –> can function more independently in society
- increase one’s current B repertoire
- can be combined with other strategies in treatment package to teach complicated repertoires
task analysis
- is required to implement the chaining procedure
- break complex skills into smaller, teachable units, the product of which is a series of sequentially ordered steps
- individualized according to age, skill level, disability, prior experiences
chaining steps
- create & confirm the task analysis
- to determine the SEQEUQNCE of Bx that are necessary & sufficient
- identify the SD & response TOPOGRAPHIES
- the individual must be able to DISCRIMINATE under which condition a given response should be performed
- mindful of PREREQUISITE skills
* 3 ways to do so*
a. observe a competent individual perform the task
b. consult with experts / persons skilled in performing the task
c. perform the task yourself - assess baseline level of mastered steps
- mastery is accessed to determine which components of the task analysis one can perform INDEPENDENTLY
* 2 ways*
a. single opportunity method
b. multiple opportunity method - decide on B chaining methods
assess baseline level of mastered steps
a. single opportunity method
- assess one’s ability to perform each B in the task analysis in CORRECT SEQUENCE
- once the individual scores a (-), all subsequent steps are scored (-) & assessment immediately stops
- more conservative
- provide less info to teacher once instruction is initiated
- quicker
- reduce likelihood of learning during assessment
assess baseline level of mastered steps
b. multiple opportunity method
- evaluate one’s baseline level of mastery across all Bx in the task analysis
- if one step is incorrect, BA completes that step for the individual & prompts the learner to do/initiate the next step
- take more time
- provide more info: which steps he can do, which steps he needs help
- increase likelihood of learning during assessment
teacher should not help the individual with any of the steps
4 B chaining methods
- forward
- backward
- backward with leap aheads
- total task
- forward chaining
- teach in naturally occuring order
- longer chain can be broken down into smaller chains / skill clusters
- if has difficulty with particular step, another task analysis may be made or environmental modification may be needed
advantage
- link smaller chains to larger one
- easy for teacher to use
- total task chaining
whole-task method
concurrent chaining
- every step is taught during every session
- variation of forward chaining
- backward chaining
- trainer completes all the initial steps except for the last step, the individual is taught to complete the last step
- the 1st B the individual performs independently produces the terminal R
advantage
- one each trial, the individual comes into contact with terminal R for the chain
disadvantage
- the potential passive participation of the individual in earlier steps
- can slow down the learning process especially if the individual has mastered some of the steps in the chain
- backward with leap aheads
- not every step is trained
- some steps are probed
- decrease total training time
interrupting & breaking B chains
- lessen B by unlinking one element of the chain from the next
- unchaining can occur with desirable & undesirable Bx
B chain interruption strategies (BCIS)
- rely on one’s ability to perform the critical steps of the chain independently, but the chain is interrupted at a predetermined step –> another B can be emitted
- effective strategy for increasing speech & language ability
breaking inappropriate chain
- reexamine Sd & response
- determine whether similar Sd cue different responses
- analyze the natural setting to identify relevant & irrelevant Sds
- determine whether Sds in the natural setting differ from training Sds
- some variations cannot be taught in training sessions –> final training trials should be conducted in the expected natural setting - identify the presence of novel stimuli in the setting
factors effecting performance of B chain
- completeness of the task analysis
- appropriate sequence/Sd - length / complexity of the chain
- schedule of R
- maintenance can be achieved by appropriate schedule of R
- consider the # of responses in a chain when determining the schedule of R - stimulus variation
- teach as much variation of Sd as possible - response variation
- Sd variation may cause response variation –> retraining may needed
differential R
- a procedure involves 2 parts:
1. R contingent on the occurrence of B not the challenging B. Challenging B occurs at a reduced rate
2. withholding R/extinction for the challenging B as much as possible - popular & effective strategy
6 types of DR
DRH: DR of HIGH rates of responding
- R for emitting Bx that are at or above pre-established rate
- increase B that displays too INFREQUENT
- full-session DRH
- R at the END of a SESSION if during the ENTIRE session the target B occurred at a rate equal or above the predetermined criterion - interval DRH
- R at the END of each INTERVAL if the during the INTERVAL the target B occurred at a rate equal or above the predetermined criterion
- total amount of time in a FULL SESSION must be divided into EQUAL INTERVALS
- if the challenging B falls short of the predetermined criterion during the INTERVAL, interval is reset, and the opportunity for R is postponed
- more complicated than full session DRH coz requires CONTINUOUS monitoring, careful timing, freq R