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Janz, Kathleen F.; Laurson, Kelly R.; Baptista, Fatima; Mahar, Matthew T.; Welk, Gregory J. – Measurement in Physical Education and Exercise Science, 2022
Using a sample of healthy youth (n = 466, 10 to 18 yr), we report the predictive utility of vertical jump power (VJ Power, W) for predicting bone strength. We measured VJ Power using mechanography and an indicator of bone strength, i.e., height-adjusted total bone mineral content less head (TBLH BMC, g), using DXA. Growth curve models were used to…
Descriptors: Preadolescents, Adolescents, Psychomotor Skills, Muscular Strength
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Tabacu, Lucia M.; Watson, Silvana Maria; Chezar, Laura C.; Gable, Robert; Oliveira, Célia R.; Lopes, João – Preventing School Failure, 2020
We examined the type of errors on multiplication and division computation problems of 326 rising fifth graders enrolled in four elementary schools in Northern Portugal. We further examined whether there was a difference in the number of errors across age and whether there was an association between students' performance on number knowledge and…
Descriptors: Error Patterns, Misconceptions, Mathematics Achievement, Mathematics Instruction