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Creswell_Research_Design_ Qualitative Quantitative and Mixed Methods Approaches 2018 5th Ed

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A-B-A Single-Subject Design

This design involves multiple observations of a single individual. The target behavior of a single individual is established over time and is

referred to as a baseline behavior. The baseline behavior is assessed, the treatment provided, and then the treatment is withdrawn.

Baseline A Treatment B Baseline A

O–O–O–O–O–X–X–X–X–X–O–O–O–O–O–O

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