Group Comparability: A Multiattribute Utility Measurement Approach to the Use of Random Assignment with Small Numbers of Aggregated Units

John W. Graham, Brian R. Flay, C. Anderson Johnson, William B. Hansen, Linda M. Collins

Research output: Contribution to journalArticle

60 Scopus citations

Abstract

It is not always possible, especially in large-scale evaluation research, to ensure that random assignment will produce groups that are comparable on any number of potentially important factors. Typically, gaining comparability has been achieved only at the expense of random assignment. A method is presented that allows multivariate comparability while making only minimal restrictions on randomization. The procedure is demonstrated in the context of assigning 63 aggregated units (schools) to 28 experimental and control conditions. Good comparability of groups for all primary main effects and interactions was venfied for 15 individual variables.

Original languageEnglish (US)
Pages (from-to)247-260
Number of pages14
JournalEvaluation Review
Volume8
Issue number2
DOIs
StatePublished - Apr 1984

All Science Journal Classification (ASJC) codes

  • Arts and Humanities (miscellaneous)
  • Social Sciences(all)

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