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Lect 8c 1
Multiple baseline designs used when 1. _____________________________2. _____________________________
Definition: A series of AB designs that:• Have __ or more baselines measured
___________________• The different baselines serve as a _____ for each
other • Baselines have different _______• The _____ IV/treatment is applied to every baseline
Multiple-Baseline Designs
Lect 8c 2
Types: The application of the IV may be “staggered” across
independent:1. ___________2. ___________3. ____________( NOTE: The baselines cannot be staggered across different
_______ = the ________________ for every baseline)
Multiple-Baseline Designs
Lect 8c 3
Multiple-baseline designs
Method: at least __baselines are conducted simultaneously IV is implemented on the most ______ baseline when an effect is observed, and the remaining baseline is
stable, IV is ________________ ________________________
Lect 8c 4
Multiple baseline design across behaviors
Multiple baseline design across __________
Multiple baseline design across _______
Lect 8c 7
The critical feature of multiple baseline designs is that, unlike a series of AB designs, the behavior is measured for each person, setting, or response type _______________ . Measuring baselines at the same time controls for many ________________________
For example, multiple baseline designs control for: ______________ _____________
Multiple-Baseline Designs
Baseline #1
Baseline #2
No treatment effect
Treatment implemented
Treatment implemented
A functional relation is demonstrated when behavior ____________________________________ for each baseline and there is a _____________ of the effect across baselines.
Lect 8c 9
Behavior #1
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Behavior #2
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_________________________________
Lect 8c 10
Behavior #1
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Lect 8c 11
Behavior #1
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Lect 8c 12
Considerations: Conditions must be conducted ________ (min. 3 data points) Different behaviors, participants, settings must be
functionally ________________ If behavior in second baseline change when the first one
changes, you cannot determine whether the treatment _____________________________________, or whether an __________________________________
Interventions need to be sufficiently ____________
Lect 8c 13
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Subject 2
Subject 1
What is wrong withThis Multiple BaselineDesign?
______________ staggered
_______ staggered
How long do you wait?
Lect 8c 15
Considerations cont: The more baselines, the more confident you can be that the
_________________ A brief ________________ can be added for added control
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Baseline Treatment
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Baseline BaselineTreatment
Subject 2
Subject 1
Lect 8c 16
Disadvantages: Some participants might receive ____________________ Requires ___________ participants, settings, or behaviors Weaker experimental control is demonstrated than the
________________ design – i.e., reversal design is the stronger design
Lect 8c 17
Reversal (ABA) or multiple-baseline designs
You are interested in investigating the effects of a new instructional program on reading in young children. What design would you consider for this study? Why?
You are interested in investigating the effects of response-cost punishment on inappropriate verbalizations in adolescents. What design would you consider for this study? Why?
You are interested in investigating the effects of response-independent reinforcer delivery on attention-maintained self-injury in adults with developmental delays. What design would you use for this study? Why?
