Principles of Research in Behavioral Science by Whitley Jr. Bernard E. Kite Mary E

Author:Whitley, Jr., Bernard E., Kite, Mary E.
Language: eng
Format: epub
Publisher: Taylor and Francis

FIGURE 13.13

Hypothetical Baseline Data illustrating High (a) and Low (b) Variability.

Treatment effects are more easily evaluated with little variability in the data.

Data Analysis in Single-Case Research

Data analysis in group comparison research is relatively straightforward: The data are numerical, and there is a well-developed set of statistical techniques designed to help the researcher draw conclusions from them. The situation is relatively more complex for single-case research. Case study data are frequently qualitative, consisting of notes made during observations, transcripts of interviews, and so forth, and so are not always amenable to statistical analysis. In addition, many researchers who use the case study method eschew statistical analysis on philosophical grounds; recall our discussion in Chapter 1 of differing approaches to scientific knowledge. Single-case experiments and some case studies do produce quantitative, or numerical, data. However, statisticians have only recently taken an interest in the analysis of single-case data, so quantitative data from single-case research are often analyzed by visual inspection—graphing the results and deciding whether the pattern of data indicates that the independent variable had an effect. This section provides a brief overview of some of the issues in the qualitative and quantitative analysis of single-case data.

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