The Category-Confound: A Design Error
- 1 October 1977
- journal article
- research article
- Published by Taylor & Francis in The Journal of Social Psychology
- Vol. 103 (1) , 57-63
- https://doi.org/10.1080/00224545.1977.9713296
Abstract
An experimental design problem, found to be frequent in some of the social psychology literature, occurs when only one sample from a population of possible samples is used to define a category of treatment factors. An example would be using one man and one woman as Es to test the effect of sex of E. This error, called the category-confound, leads to an inability to generalize treatment effects beyond the particular sample chosen, and to an inability to perform the appropriate significance tests. Several examples are discussed in detail, and the frequency of occurrence of this error in two recent journals in social psychology are surveyed. In most cases the category-confound can be dispelled simply by taking an adequately large sample from the population.Keywords
This publication has 18 references indexed in Scilit:
- Mediators between frustration and aggression in a field experimentJournal of Experimental Social Psychology, 1974
- Persuasion, surveillance, and voting behaviorJournal of Experimental Social Psychology, 1974
- The effects of choice and source of constraint on children's attributions of preferenceJournal of Experimental Social Psychology, 1974
- Mistreatment of an esteemed other as a consequence affecting dissonance reductionJournal of Experimental Social Psychology, 1974
- Residual Emotional Arousal as a Distractor in PersuasionThe Journal of Social Psychology, 1974
- The Effects of Appearance on ComplianceThe Journal of Social Psychology, 1974
- Anonymous Altruism: Extending the Lost Letter TechniqueThe Journal of Social Psychology, 1974
- Power and Dependency: Legitimation of Dependency ConditionsThe Journal of Social Psychology, 1974
- The aggression-inhibiting influence of nonhostile humorJournal of Experimental Social Psychology, 1974
- The language-as-fixed-effect fallacy: A critique of language statistics in psychological researchJournal of Verbal Learning and Verbal Behavior, 1973