Systems model and individual simulations of training strategies in elite short-track speed skaters

This study aimed to evaluate the effect of simulated training strategies on performance potential in elite short-track speed skaters. Training load and field-based criterion performances from fifteen athletes (10 males, 5 females) were collected over a 3-month training period and the relationship between training loads and performance was computed with a variable dose-response model using a genetic algorithm. Individual simulations of tapers preceded or not preceded by an overload training (OT) were assessed. We obtained a significant correlation between actual and modelled performances (R² = 0.76 ± 0.07). Regarding model parameters, no significant difference was found between males and females but the time to recover performance tended to be lower in females. Simulations in which the taper parameters were free highlighted that an exponential or a step taper were the most effective for increasing performance compared to a linear taper (p < 0.05). Optimal exponential taper duration after OT was 10.7 ± 2.4d and the optimal load reduction was 75.9 ± 3.7%. OT intensity had the greatest influence on the predicted performance, followed by OT duration, taper decay, and to a lesser extent load reduction during taper and taper duration. Thus, a variable dose-response systems model allows the evaluation of different taper strategies and their potential effect on performance changes.     

Learning disabled and emotionally disturbed: Will the labels affect teacher planning?

Teachers' conception and use of the terms “learning disability” and “emotional disturbance” was investigated in two studies to determine the implications for developing educational programs. In Study I, experienced teachers in a special education certification program categorized 106 child characteristics as LD, ED, or both LD and ED. In Study II, in-service teachers specified annual achievement goals and extent of regular class placement for the same child bearing either the LD or ED label. Results from Study I showed that the majority of child characteristics were considered by teachers to be relevant to either LD or ED labels. A subset of 23 characteristics was significantly related to one or the other label—LD characteristics representing academic and health/development areas, and ED characteristics representing psychological and behavioral areas. In Study II, teachers recalled the ED label significantly more often than the LD label, but did not specify significantly different goals or regular class participation for the child under the two labeling conditions. The findings support the conclusion that teachers can treat the LD and ED constructs as mutually exclusive when eligibility for special service is the decision, and as mutually inclusive when program-planning decisions are made.     

A validity study of the Kinetic school drawing technique

Kinetic School Drawings were obtained from 100 fifth-grade students. The drawings were analyzed along a number of dimensions thought to measure “negative” affect. Significant correlations with academic achievement were found for a number of measures, and the results of a stepwise multiple regression were significant. In general, the study supported the validity of the technique.     

The Effects of Motion Math: Bounce on Students’ Fraction Knowledge

National assessments suggest that many students do not display proficiency with fractions. Considering that time and materials are precious resources, many educators are looking to use technology to provide supplemental instruction with low demand on the instructor. The current study utilized a multiple-baseline design to examine the effects of the Motion Math: Bounce application on the fraction quantity comparison and number line placement skills of three fifth-grade students. Results indicate that Motion Math: Bounce improved the quantity comparison skills of all three participants and the number line skills of one participant. Additionally, all three participants made improvements from pre- to posttest on a measure of general fraction knowledge. Implications for future research and intervention implementation are discussed.