Adel S. Abduljabbar

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Keywords: Academic self-concept Dimensional comparison theory Social comparison theory Frame of reference effects CFA/SEM A B S T R A C T In a comprehensive study (15,356 Dutch 9th grade students from 651 classes in 95 schools) we empirically tested the dimensional comparison theory (DCT) propositions formulated by Möller & Marsh (2013) as an extension of(More)
The temporal ordering of depression, aggression, and victimization has important implications for theory, policy, and practice. For a representative sample of high school students (Grades 7-10; N = 3,793) who completed the same psychometrically strong, multiitem scales 6 times over a 2-year period, there were reciprocal effects between relational-aggression(More)
Almost every teacher assigns homework to students. Teachers, parents as well as students believe that this activity-which should be done in non-school hours-enhances achievement. The amount of time students spend doing homework has been the focus of national surveys and international comparisons. According to Kackar , Shumow, Schmidt & Grzetichage (2011)(More)
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