Published Online: 30 JAN 2010
Copyright © 2010 John Wiley & Sons, Inc. All rights reserved.
Corsini Encyclopedia of Psychology
How to Cite
Shadish, W. R. and Galindo, R. 2010. Propensity Scores. Corsini Encyclopedia of Psychology. 1–2.
- Published Online: 30 JAN 2010
A propensity score is the conditional probability of a unit being assigned to a condition, given a set of observed covariates. These scores can be used to equate groups on those covariates by using matching, blocking, weighting, or analysis of covariance. In theory, propensity score adjustments should reduce the bias that often accompanies nonrandom assignment, and the adjusted treatment effects should be closer to the effects that would have occurred had participants been randomly assigned to conditions.
- propensity score analysis;
- strong ignorability;