Performance tolerance and boat set-up in elite sprint kayaking

The aim of this study was to examine the inter-relationship between athlete morphology, equipment set-up and performance in elite sprint kayaking. Correlations applied to data from the 2000 Olympics were used to select the most important links between morphology and boat set-up--paddle grip width and foot-bar distance. Associations between body size and the above selected equipment set-ups were calculated using a Pearson correlation matrix, to facilitate the logical selection of independent variables as input for regression analyses. Significant (p < 0.01) regression equations were developed for the prediction of foot-bar distance (r2 = 0.589: standard error of estimate (SEE) = 4.48) and paddle grip width (r2 = 0.541: SEE = 3.08). Three national-standard sprint kayakers used their preferred set-up together with modifications of their predicted set-up, derived from Olympic data, to test performance tolerance in sprint kayaking. Mean coefficients of multiple determination over three trials for the three paddlers of 0.91, 0.91 and 0.92 for left paddle force, right paddle force, and paddle angle at water entry, respectively, were recorded when using their preferred set-up. These data showed that the paddlers produce consistent patterns of motion. The intervention of altering the boat set-up resulted in varying changes to boat speed. The mean preferred speed for the three paddlers of 4.47 m/s was reduced by 0.07 and 0.10 m/s when the above boat set-up was modified to a predicted and 'predicted plus one standard deviation'respectively. These changes in boat speed were the result of alterations in the mechanics of paddling technique.     

Child and adolescent multidimensional self‐concept: A five‐instrument factor analysis

The factor structure of five self‐concept scales from a hierarchical, multidimensional theoretical model was investigated. The Coopersmith Self‐Esteem Inventory, Multidimensional Self Concept Scale, Piers‐Harris Self‐Concept Scale, Self‐Esteem Index, and the Tennessee Self‐Concept Scale were administered to 221 students in Grades 5 through 8 in a counter‐balanced administration format. The five scales each yielded strong general factors and six dominant factors that coincide with the proposed theoretical model, which reflects social, affect, competence, academic, family, and physical self‐concepts. © 2000 John Wiley & Sons, Inc.     

Visual analysis of single-subject studies by school psychologists

Visual inference is the predominant mode of data analysis reported in single-subject research; however, this process is subject to systematic biases that affect its use. To guide the process of visual inference, a four-step model is presented for the assessment of: (a) reliability, (b) intervention effect, (c) meaningfulness, and (d) generalizability. A Visual Inference Checklist (VIC) systematizes this assessment process.     

Comparison of the PPVT-R and WISC-R with urban educable mentally retarded students

Comparisons of the revised PPVT (PPVT-R) and the WISC-R were made with 67 EMR students. Significant differences were found between the PPVT-R mean standard scores and Verbal, Performance, and Full Scale IQs. The PPVT-R did not correlate significantly with the WISC-R scales or subtests, suggesting the tests are measuring different abilities.     

The “Gallop Poll”: Using Evaluation to Develop Fossil Horses in Cyberspace,An Online Exhibition

The number, complexity, and popularity of World Wide Web sites has increased dramatically in recent years, providing a new opportunity for museum access. This case study describes the front‐end and formative evaluations conducted during the development of the Florida Museum of Natural History's first virtual exhibition, Fossil Horses in Cyberspace < http:www.flmnh.ufl.edunatscivertpaleofhcfhc.htm >, which during 2000 received −540,000 hits equating to −60,000 user sessions. As with physical exhibitions, evaluation is critical to enhancing the educational effectiveness and appeal of online exhibitions.     

Computer-adapted PPVT-R: A comparison between standard and modified versions within an elementary school population

The PPVT-R was administered to 112 elementary school children in both computerautomated and standard formats. The comparability of test results was investigated. The automated format consisted of transparent plates placed in front of a computer screen with an Apple IIE computer and keyboard as the response medium. The correlations found between the standard and modified versions were positive, substantial, and acceptable for clinical use. The usefulness of adapted psychological testing with normal and response-limited individuals is discussed.     

Canonical variates in longitudinal achievement data

The purpose of this study was to identify factors that would explain the observed longitudinal correlations between educational measures commonly secured at the primary and middle grades. Data obtained on two samples of over 300 pupils each were subjected to canonical variate analysis. The canonical correlations and canonical loadings indicated the existence of a single dominant factor between the primary and middle grade data. This factor was interpreted as general scholastic ability, and the results were discussed along with educational implications.