Paired samples is a type of research design in which there is a dependency between two groups of data collected from a single sample. In a within-subjects approach, paired samples data often takes the form of pre- and post- data; in a between-subjects approach, paired samples often takes the form of matched groups. Statistical approaches have been developed to handle paired samples data that is measured on an interval/ratio scale (paired samples t test) as well as an ordinal scale (Wilcoxon Signed Ranks Test). This presentation provides more information on paired samples research designs, presents example research questions for which this approach might be used, and addresses the task of interpreting results.
- Frances Chumney, Ph.D.