Effects of Goal Setting on Achievement in Archery

This study investigated the effects of goal setting in teacher-led group conferences on achievement in archery. University undergraduates enrolled in three beginning archery classes (N = 30) were randomly assigned to two treatment groups—group conference with goal setting and group conferences only. For 10 weeks, subjects met twice a week for archery instruction and once a week with the instructor for a 10-minute conference. Subjects in the goal-setting conference group were directed to set numerical and verbal goals using a printed goal-setting form. Three achievement tests were administered while subjects were shooting from a distance of 20 yards: an initial test during week 1, a progress test during week 6, and a final test during week 10. Analysis of the data indicated that when groups were adjusted for initial differences, the goal-setting group achieved significantly higher scores in archery than the non-goal-setting group (F = 5.31, p < .05). Motivational implications of goal setting procedures are discussed.     

From Marin County's Seventies Clunker to the Durango World Championship 1990: A History of Mountain Biking in the USA

Between the 1970s, during which several enthusiastic cyclists rode off-road, and the 1990s, during which the first Union Cycliste Internationale World Championship took place in Durango (Colorado), different steps contributed to the success of mountain bike in the US. Inventions took place throughout the period from Gary Fisher's mechanical improvements in 1975 to Joe Breeze's first specialized frames made in 1977. In the same fashion, the ‘Stumpjumper’ was sold on a large scale in 1982, making it the first industrially-produced mountain bike, which led to a new stage in terms of commercialization. The mountain bike opened a new market in the cycling industry and certainly became more financially accessible to a large number of people. This sport, which began in the US, became a worldwide outdoor sport in the last decade of the twentieth century when the Olympics welcomed it with open arms at the Atlanta Olympic Games.     

A Comparison of Statistical Models for Calculating Reliability of the Hoffmann Reflex

The Hoffmann reflex is obtained through surface electromyographic recordings, and it is one of the most common neurophysiological techniques in exercise science. Measurement and evaluation of the peak-to-peak amplitude of the Hoffmann reflex has been guided by the observation that it is a variable response that requires multiple trials to obtain a stable mean. As a result, reliability assessment of the Hoffmann reflex has thus far been limited to trial-to-trial variability or the mean of multiple trials across test days to evaluate day-to-day variability, without considering how the two dimensions of measurement interact to affect test–retest reliability. This article compares two analysis of variance models for reliability assessment of the peak-to-peak amplitude of the Hoffmann reflex: one model incorporated both days and trials, and the other used the mean of multiple trials on each test day. The intraclass correlation coefficient calculated from an analysis of variance model that incorporated both trial-to-trial and day-to-day error variances was R = .93. Using the mean of the trials for each test day as a single score resulted in a decrease in the intraclass correlation coefficient (R _2,1 = .76). This study demonstrated that an analysis of variance model that accounts for both trial-to-trial and day-to-day error variances provided a higher estimate of reliability. Further, reliability estimation based on the interaction between both trials and days revealed that a schedule with additional test days had a disproportionate impact upon securing a reliable measure of Hoffmann reflex amplitude.