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Ricardo Peterson Silveira Pro Stergiou Felipe P. Carpes Flávio A. de S. Castro Larry Katz Darren J. Stefanyshyn 《Sports biomechanics / International Society of Biomechanics in Sports》2017,16(2):177-186
The aim of this study was to determine the precision and accuracy of the vertical and anterior–posterior force components of the portable PASCO PS-2142 force plate. Impulse, peak force, and time to peak force were assessed and compared to a gold standard force plate in three different tasks: vertical jump, forward jump, and sprint start. Two healthy male participants performed ten trials for each task, resulting in 60 trials. Data analyses revealed good precision and accuracy for the vertical component of the portable force plate, with relative bias and root mean square (RMS) error values nearly the same in all tasks for the impulse, time to peak force, and peak force parameters. Precision and accuracy of the anterior–posterior component were lower for the impulse and time to peak force, with relative bias and RMS error values nearly the same between tasks. Despite the lower precision and accuracy of the anterior–posterior component of the portable force plate, these errors were systematic, reflecting a good repeatability of the measure. In addition, all variables presented good agreement between the portable and gold standard platforms. Our results provide a good perspective for using the aforementioned portable force plate in sports and clinical biomechanics. 相似文献
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Liebermann DG Katz L Hughes MD Bartlett RM McClements J Franks IM 《Journal of sports sciences》2002,20(10):755-769
This paper overviews the diverse information technologies that are used to provide athletes with relevant feedback. Examples taken from various sports are used to illustrate selected applications of technology-based feedback. Several feedback systems are discussed, including vision, audition and proprioception. Each technology described here is based on the assumption that feedback would eventually enhance skill acquisition and sport performance and, as such, its usefulness to athletes and coaches in training is critically evaluated. 相似文献
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Burcu Arslan Yang Jiang Madeleine Keehner Tao Gong Irvin R. Katz Fred Yan 《Educational Measurement》2020,39(2):96-106
Computer-based educational assessments often include items that involve drag-and-drop responses. There are different ways that drag-and-drop items can be laid out and different choices that test developers can make when designing these items. Currently, these decisions are based on experts’ professional judgments and design constraints, rather than empirical research, which might threaten the validity of interpretations of test outcomes. To this end, we investigated the effect of drag-and-drop item features on test-taker performance and response strategies with a cognition-centered approach. Four hundred and seventy-six adult participants solved content-equivalent drag-and-drop mathematics items under five design variants. Results showed that: (a) test takers’ performance and response strategies were affected by the experimental manipulations, and (b) test takers mostly used cognitively efficient response strategies regardless of the manipulated item features. Implications of the findings are provided to support test developers’ design decisions. 相似文献
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Studies in Israel relating to attitudes of various ethnic, cultural and religious groups towards the disabled were reviewed. The results indicate that although there were differences in attitudes towards the disabled, these differences appear to be a function of interaction effects between many other variables and not necessarily only related to ethnic, cultural, and religious affiliation. 相似文献
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This article examined transition rates of young children (n = 102) from an early intervention program at the Linda Ray Intervention Program (LRIP) who had documented developmental delays and co-occurring prenatal drug exposure often coupled with verified child maltreatment. Findings indicated that there was significant group improvement from entrance to exit across all six Battelle Domains at the p < .05 level. Also, children who were enrolled for a longer period of time saw significantly better adaptive, personal-social, communication, and Battelle total scale scores at the p < .05 level. Finally, data revealed that boys were 5 times more likely than girls to be transitioned to Part B services after exit from LRIP. A longitudinal study of a subgroup of these children indicated that LRIP children who were in grades K–3 needed fewer special education services in elementary school than they needed at age 36 months, indicating a further reduction in special education needs for these children. 相似文献
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Extracts of writings of great scientists and philosophers were used as handouts to supplement text and lectures on environmental science for nonscience majors requiring a laboratory course. An assessment form was developed to judge the impact of this process on students. Results of the first semester are described with plans for future implementation. A list of handouts is appended. 相似文献