Chapter 11- Single-Subject Design
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| Why were single-subject designs developed? | to demonstrate the influence of setting and other intervention variables upon the performance of research participants, and to document the individual variability of participants' performance in response to these variables
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| When are single-subject designs used? | where withholding treatment is considered unethical, or random assignment of subjects may not be possible; where it is too difficult to get enough participants; to obtain detailed information about factors
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| What are some of the problems with group designs? | often difficult to structure a powerful group design in rehab settings; typically only call for measurement of participants a few times; often have problems with external validity
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| What are some of the characteristics of single-subject designs? | baseline assessment, stability of performance, continuous assessment, and use of different phases
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| What are some of the experimental designs for single-subject designs? | A-B designs, withdrawal designs, multiple-baseline designs, alternating-treatment designs, interaction designs, changing-criterion designs
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| How are single-subject data typically analyzed? | visually from graphed data as opposed to statistical analysis
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| What are some of the considerations when using single-subject designs? | the duration of each intervention, frequency with which to alternate the intervention sessions or phases
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| What are some of the limitations of single-subject designs? | may create ethical dilemmas, amount of control over internal validity threats, generalizability of results, concern with the theory and practice of statistical analysis of singe-subject designs
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