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Direct linkGu, Zhengguo; Emons, Wilco H. M.; Sijtsma, Klaas – Journal of Educational and Behavioral Statistics, 2021
Clinical, medical, and health psychologists use difference scores obtained from pretest--posttest designs employing the same test to assess intraindividual change possibly caused by an intervention addressing, for example, anxiety, depression, eating disorder, or addiction. Reliability of difference scores is important for interpreting observed…
Descriptors: Test Reliability, Scores, Pretests Posttests, Computation
