Single Case, Quasi-Experimental, and Developmental Research_10-1.31.11

Single Case, Quasi-Experimental, and Developmental Research_10-1.31.11

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Single Case, Quasi- Experimental, and Developmental Research PSY 250
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Threats to Validity _____________ Other events occurring at time of manipulation could cause the effect _____________ Naturally occurring changes could be responsible for the effect _____________ Administration of a test can affect scores on subsequent administrations of that test ______________
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Threats to Validity __________________ When units are selected for their extreme scores, their scores will likely change in the direction of the mean __________________ Differences in individuals across the experimental groups could cause the observed effect __________________ Loss of participants that is systematically
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Single Case Research Designs Used to evaluate the effect of a manipulation or treatment on a single research subject Uses a ___________: Large series of observations made on the same variable consecutively over time Prior to manipulation, baseline assessment is conducted Useful in clinical, educational, and other applied settings
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Single Case Designs Advantages Can study individuals who come from unique or difficult-to-find populations Can look at specific individuals Visual inspection of the data Disadvantages _____________ Limited generalizability Lack of statistics
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A-B Design Baseline X X X Treatment X X X A B
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A-B-A Design Baseline X X X Treatment Return to Baseline X X X X X X A B A
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This note was uploaded on 11/20/2011 for the course PSY 250 taught by Professor Quinton,wj during the Fall '08 term at SUNY Buffalo.

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Single Case, Quasi-Experimental, and Developmental Research_10-1.31.11

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