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Small Group Research, Vol. 33, No. 2, 209-232 (2002)
DOI: 10.1177/104649640203300203

A Data Visualization Procedure for the Evaluation of Group Treatment Outcomes Across Units of Analysis

David A. Patterson

University of Tennessee

Randall E. Basham

University of Tennessee

This study presents a novel method for the collection and graphical representation of group evaluation data that enables the simultaneous display of outcomes across units of analysis. This method affords the researcher/practitioner improved options for simultaneously evaluating and comparing individual and group change over time. Data for this study are drawn from 10 experiential, group psychotherapy training groups that met on a weekly basis. A total of 185, second-year graduate social work students evaluated their satisfaction with their personal and group experience across eight dimensions. A multiple page Excel spreadsheet was developed for the collection, computation, and visual representation of scores from the evaluation instrument. Three-dimensional surface plots are used here to simultaneously represent individual and group outcomes. Surface plots provide a visual display of the topography of group and individual change over time. This data visualization method utilizes readily available technology to display group outcomes at multiple levels of analysis.


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