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Comparing The Reversal Design And Multiple Baseline Theory

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In comparison to the reversal design mentioned in Chapter 4, the multiple baseline design is useful when testing a treatment that produces irreversible effects, such as teaching a reading technique. Similar to a reversal design, a multiple baseline design starts with a baseline condition, proceeding with a treatment condition. Alternatively, a researcher using a multiple baseline design does not repeat a baseline measurement after the treatment is implemented. This design was originally developed for behavioral psychologists (Compton, 2010), but the application has spread; this design is an informative tool for investigating changes in behavior over time. According to Horner et al. (2005), multiple baseline studies involve giving a treatment at different delays after a baseline measure is made. This is usually done using the baselines of multiple participants in order to prevent any confounding results produced by multiple presentations of the treatment condition, although it is true that some multiple baseline designs measure treatment effects at different delays using a single participant (Cozby, 2009). In a multiple baseline design involving multiple participants, each participant receives the same treatment condition; the time at which treatment is received differs across participants. In the case that a researcher was using a multiple baseline design to measure how the latency at which participants make cued decisions is affected by injections of phencyclidine (PCP),

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