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Direct linkVan der Elst, Wim; Ouwehand, Carolijn; van Rijn, Peter; Lee, Nikki; Van Boxtel, Martin; Jolles, Jelle – Assessment, 2013
The purpose of the present study was to evaluate the psychometric properties of a shortened version of the Raven Standard Progressive Matrices (SPM) under an item response theory framework (the one- and two-parameter logistic models). The shortened Raven SPM was administered to N = 453 cognitively healthy adults aged between 24 and 83 years. The…
Descriptors: Intelligence Tests, Item Response Theory, Psychometrics, Adults
Vander Heyden, Karin M.; Huizinga, Mariette; Jolles, Jelle – Developmental Psychology, 2017
Children practice their spatial skills when playing with spatial toys, such as construction materials, board games, and puzzles. Sex and SES differences are observed in the engagement in such spatial play activities at home, which relate to individual differences in spatial performance. The current study investigated the effects of explicitly…
Descriptors: Intervention, Play, Games, Puzzles
Droop, Mienke; van Elsäcker, Willy; Voeten, Marinus J. M.; Verhoeven, Ludo – Journal of Research on Educational Effectiveness, 2016
The purpose of the present study was to examine the effects of a program that offered sustained strategic reading instruction on reading abilities of third and fourth graders. The study was conducted among 1,469 children from 40 schools in the Netherlands. Schools were randomly assigned to either the experimental or control group. Multilevel…
Descriptors: Reading Instruction, Reading Strategies, Elementary School Students, Intermediate Grades
