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Rehab research

Chapter 11- Single-Subject Design

QuestionAnswer
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
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
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
What are some of the characteristics of single-subject designs? baseline assessment, stability of performance, continuous assessment, and use of different phases
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
How are single-subject data typically analyzed? visually from graphed data as opposed to statistical analysis
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
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
Created by: amwilliamson