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22. Assessing Children’s Computational Skills: Validation of an Adapted Version of the Canadian Achievement Test - Second Edition for 10 year olds

Author

Richard E. Tremblay, Garon-Carrier G, Ouellet E, Ginette Dionne, and Boivin M

Subjects
Mathematics education, Achievement test, Psychology
Abstract

This study tested the validity of the mathematic subtest of the Canadian Achievement Test – Second Edition (CAT/2; Canadian Test Centre, 1992) for 10 year olds, adapted from the original version administered at age 8. The analyses showed satisfactory internal consistency of the adapted version at age 10, and slightly higher internal consistency than that of the original version at age 8 (.81 vs .76). The total scores distribution of the age 10 version were slightly negatively skewed, suggesting that the tool is sensitive to assess children with lower mathematic abilities. Using a correlational design, the results showed substantial cross-age convergent validity between the age 8 and age 10 versions (.49, p < .001), and cross-measure convergent and discriminant validity of this adapted version. We conclude that the adapted mathematics subtest of the Canadian Achievement Test could be used to reliably measure children’s computational skills at age 10.

Published
2020
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35. Observables for anticipating tornadogenesis in mesocyclones

Author

Carrier, G, Fendell, F, Mitchell, J, and Bronstein, M

Subjects
Meteorology And Climatology
Abstract

We seek to identify an observable for anticipating tornadogenesis in mesocyclones, because such tornadoes are characterized by particularly long life, long and wide path, and high wind speed. We associate tornadogenesis with the transition from a one-cell vortex to a two-cell vortex. In such a transition, 'insertion' of a virtually nonrotating, slowly recirculating core displaces that high-swirl-speed air which is rapidly ascending along a moist-adiabatic locus of thermodynamic states, to an annulus at small but finite distance from the axis of rotation. Such a transition, on a vastly larger lateral scale, is known to characterize intensification of a tropical storm to a typhoon. We examine analytically a quasisteady axisymmetric model of a four-part vortex structure consisting of a bulk potential vortex, near-ground inflow layer, 'eyewall', and 'eye'. We inquire whether such a four-part intense vortex, formed in convectively unstably stratified air, is self-sustaining. In particular, we inquire whether the vertical profile of the angular momentum at the periphery is a discriminant for identifying self-sustaining vortices.

Published
1992

37. Twin classroom dilemma: to study together or separately?

Author

White, E, Garon-Carrier, G, Tosto, M.G, Malykh, S.B, Li, X, Kiddle, B, Riglin, L, Byrne, B, Dionne, G, Brendgen, M, Vitaro, F, Tremblay, R.E, Boivin, M, Kovas, Y, White, E, Garon-Carrier, G, Tosto, M.G, Malykh, S.B, Li, X, Kiddle, B, Riglin, L, Byrne, B, Dionne, G, Brendgen, M, Vitaro, F, Tremblay, R.E, Boivin, M, and Kovas, Y

Published
2018

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