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Direct linkSoland, James – Educational and Psychological Measurement, 2022
Considerable thought is often put into designing randomized control trials (RCTs). From power analyses and complex sampling designs implemented preintervention to nuanced quasi-experimental models used to estimate treatment effects postintervention, RCT design can be quite complicated. Yet when psychological constructs measured using survey scales…
Descriptors: Item Response Theory, Surveys, Scoring, Randomized Controlled Trials
Peer reviewedZahrly, Jan – Educational and Psychological Measurement, 1990
This research-subject attrition study evaluated differences between 45 subjects who completed a 22-month longitudinal study and 34 who dropped out. Subjects were blue-collar employees. Discriminant analysis proved to be a useful tool for determining some of longitudinal data bias. Attrition was predicted by situational rather than personality…
Descriptors: Adults, Attrition (Research Studies), Blue Collar Occupations, Discriminant Analysis
