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Van der Kooy-Hofland, Verna A. C.; Van der Kooy, Jacoba; Bus, Adriana G.; van IJzendoorn, Marinus H.; Bonsel, Gouke J. – Journal of Educational Psychology, 2012
In a randomized control trial, the authors tested whether short- and long-term effects of an early literacy intervention are moderated by mild perinatal adversities in accordance with differential susceptibility theory. One-hundred 5-year-old children (58% male) who scored at or below the 30th percentile on early literacy measures were randomized…
Descriptors: Foreign Countries, Reading Research, Research Design, Control Groups
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Morsink, Maarten C.; Dukers, Danny F. – Advances in Physiology Education, 2009
Animal models have been widely used for studying the physiology and pharmacology of psychiatric and neurological diseases. The concepts of face, construct, and predictive validity are used as indicators to estimate the extent to which the animal model mimics the disease. Currently, we used these three concepts to design a theoretical assignment to…
Descriptors: Control Groups, Animals, Undergraduate Students, Research Design
Houtveen, Th. – 1993
This paper presents findings of a study that examined the effectiveness of the guidance program used by change agents in the Dutch School Improvement Project (NSIP) on program implementation. Sixteen schools composed the experimental group and 13 made up the control group. The experimental variable was the guidance strategy of the NSIP. The two…
Descriptors: Control Groups, Educational Change, Educational Improvement, Elementary Secondary Education