Issues of Design and Analysis in Evaluation Research

Duane F. Alwin, Michael J. Sullivan

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


This paper addresses the question of internal validity in quasi-experimental and nonexperimental social policy research. We focus primary attention on problems of selection in research designs where assignment to experimental conditions occurs on a nonrandom basis. Five different solutions to the problems of selection are discussed-randomization, covariance adjustment, gain scores, matching, and explicit selection-and we examine the conditions under which these solutions are useful. The problem of random measurement error is discussed within the context of our elaboration of these techniques.

Original languageEnglish (US)
Pages (from-to)77-100
Number of pages24
JournalSociological Methods & Research
Issue number1
StatePublished - Aug 1975

All Science Journal Classification (ASJC) codes

  • Social Sciences (miscellaneous)
  • Sociology and Political Science


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