DOI: 10.3233/wor-2003-00285 ISSN: 1051-9815
Pretest-posttest designs and measurement of change
Dimiter M. Dimitrov, Phillip D. Rumrill, Jr.The article examines issues involved in comparing groups and measuring change with pretest and posttest data. Different pretest-posttest designs are presented in a manner that can help rehabilitation professionals to better understand and determine effects resulting from selected interventions. The reliability of gain scores in pretest-posttest measurement is also discussed in the context of rehabilitation research and practice.