8 multiple baseline designs Flashcards
Useful when withdrawing the treatment or reversing a behavior is NOT Practical or ethical
Allows an experimenter to evaluate interventions before applying on a larger scale
Multiple baseline design: advantages
Each baseline has to be long enough to demonstrate stability but not so long as her deny needed treatment, or be too costly in time or resources
Behaviors that are interdependent are inappropriate for the design.
should be independent but functionally similar
Multiple baseline design limitations
Multiple Probe design
Nonconcurrent (Delayed) multiple probe design
Multiple BASELINE design variations
Avoid excessive ritualistic gathering of baseline data
Might avoid practice effects
May save time, money and effort if the dependent variable is truly stable during and between measures
Advantages of multiple probe design
If dependent variable is unstable between probes, then the baseline data may be a poor representation
Disadvantage of multiple probe design
A.k.a. delayed
“Not at the same time”
Variation of multiple baseline
Data do not completely overlap in time in the panels.
Nonconcurrent (ie., Delayed) multiple baseline design
Not constrained by needing all participants concurrently present which might be helpful if participants drop out
Advantage of a non-concurrent MBD
Not useful across settings or behaviors
Higher risk that a DV will change before the IV is introduced
Disadvantage of nonconcurrent multiple baseline design
Which of the following requires a mostly continuous series of data points in the baseline phase
Multiple baseline design
Multiple probe design
All of the above
Multiple baseline design
We’d expect the behavior to change before we introduce the independent variable or not change after we introduce the independent variable
If some Extraneous variable caused the change in the behavior
Two or more, (Multiple), Baseline phases and treatment phases occur across the different subjects, behaviors, or settings
Display appears as a vertical stack of two or more data panels
Each initial Baseline is of a different length per panel as the IV is introduced in a staggered fashion to each baseline
Multiple Baseline design
A variation of the multiple baseline design that features intermittent measures, or probes, during baseline
Multiple Probe Design
What is the initial level of performance on each step in the sequence?
What happens when sequential opportunities to perform each step in the sequence are provided prior to that step?
What happens to each step as training is applied?
What happens to the performance of untrained steps in the sequence as criterion-level performance is reached on the preceding steps?
Questions of a Multiple Probe Design
- Initial probe is taken to determine the subject’s level of performance on each behavior in a sequence;
- a series of baseline measures is obtained on each step prior to training on that step; and,
- after criterion-level performance is reached on any training step, a probe of each step in the sequence is obtained to determine whether performance changes have occurred in any other steps
3 Key Features of Multiple Probe Design
Used to evaluate the effects of instruction on skill sequences in which it is unlikely that the subject can improve performance on later steps in the sequence before learning prior steps
Multiple probe design
