Search results

1

Lower-Limb Power cannot be Estimated Accurately from Vertical Jump Tests

100%

Tessier J.-F., Basset F.-A., Simoneau M., Teasdale N.

Journal of Human Kinetics

|

2013

|

vol. 38

5-13

EN

The countermovement jump test is often adopted to monitor lower-limb power of an individual. Despite several studies on the validity of this test, there is still a need to determine the minimal difference needed to be confident that a difference in power between two individuals is present or that a true change in the performance of an individual has occurred. In this study, power was measured from ground reaction forces and compared to that obtained from predictive equations for two groups of subjects (67 trained and 20 highly trained individuals). The height of each jump was determined with kinematic techniques. The main outcome is a large discrepancy between power calculated from ground reaction forces and that calculated from predictive equations. For the trained group, the R-square value between power and predicted power was 0.53 and the minimal difference to consider that two individuals were different was 821.7 W. For the highly trained individuals, a much larger R-square value was obtained (0.94). Despite this, the minimal difference to consider that two individuals were different was still large (689.3 W). The large minimal differences obtained raise serious concerns about using countermovement jumps for appraisal and monitoring of lower-limb power of an individual.

2

Reliabity and Validity of the Trichotomous and 2×2 Achievement Goal Models in Turkish University Physical Activity Settings

100%

Agbuga B.

Journal of Human Kinetics

|

2009

|

vol. 22

77-82

EN

The present research is designed to continue exploration of the reliability and validity of the 2 × 2 and trichotomous achievement goal frameworks in Physical Education Teacher Education (PETE) Turkish undergraduate physical activity courses. One hundred and fifty eight Turkish undergraduate students (116 males; 42 females) served as participants. They completed both the trichotomous and 2 × 2 achievement goal scales. Confirmatory factor analysis (CFA) was employed to examine and construct the validity of both the 2 × 2 and trichotomous achievement goal models. The results showed that the 2 × 2 achievement goal model represents an adequate fit to the data (X 2/df = 1.66, CFI = 0.91, GFI = 0.93, NNFI = 0.89, and RMSEA = 0.06). Cronbach's alpha coefficients for the mastery-approach, performance-approach, mastery-avoidance, and performance-avoidance goals were 0.65, 0.68, 0.72, and 0.60, respectively, indicating acceptable internal consistency. However, CFA analysis pointed out that the trichotomous achievement goal model provided a poor fit to the data (X 2/df = 1.59, CFI = 0.85, GFI = 0.88, NNFI = 0.69, and RMSEA = 0.06), although Cronbach's alpha coefficients in the trichotomous achievement goal model indicated acceptable reliability (mastery goals = 0.70, performance-approach goals = 0.73, and performance-avoidance goals = 0.64). Results from the present study indicate that only the 2 × 2 achievement goal model provides a reliable and valid measure of achievement goals for Turkish undergraduate students.

3

Validity and Reproducibility of the Sargent Jump Test in the Assessment of Explosive Strength in Soccer Players

100%

de Salles P., Vasconcellos F., de Salles G., Fonseca R., Dantas E.

Journal of Human Kinetics

|

2012

|

vol. 33

115-121

EN

The purpose of this study was to check the validity and the intra- and inter-evaluators reproducibility of the Sargent Jump Test, as an instrument of explosive strength measurement of soccer players of the sub-15 class. Forty-five soccer players were randomly selected from different clubs competing in the local soccer championship. All subjects performed one test on the same jump platform model Jumptest® (Hidrofit Ltda, Brazil) and two independent Sargent Jump Tests assessed by the same evaluator. Two days later, another Sargent Jump Test was performed simultaneously assessed by 2 evaluators. In all tests, three jumps were performed and the highest one was registered. In order to check the validity, the first Sargent Jump Test results were compared to those from the jump platform, considered the gold standard. To evaluate intra- and inter-evaluator reproducibility, results from the first, second and third Sargent Jump Tests were analyzed. The validity and reproducibility were evaluated by intraclass correlation coefficients (ICC), and by the Bland and Altman test (statistical pack SPSS 11.0), with a significance level set at p<0.05. The values found for validity (r=0.99, p=0.001), for intra-evaluator reproducibility (r=0.99, p=0.001) and for inter-evaluator reproducibility (r=1.0, p=0.001), permitted us to conclude that the Sargent Jump Test is a valid and reproducible instrument for measuring the explosive strength in homogeneous groups, such as those used in the present study.

4

Adaptation of Quality of Life Module EORTC QLQ-CR29 for Polish Patients with Rectal Cancer - Initial Assessment of Validity and Raeliability

88%

Nowak W., Tobiasz-Adamczyk B., Brzyski P., Sałówka J., Kuliś D., Richter P.

Polish Journal of Surgery

|

2011

|

vol. 83

|

issue 9

502-510

EN

Heath related quality of life has been an important object of interest in the clinical practice, focused on assessment of treatment effects from patient's point of view, with particular emphasis placed on effect of treatment on daily patient functioning. Concept of health-related quality of life needs valid and reliable instruments.The aim of the study was to present the process of validation of a new version of EORTC QLQ-CR29 module in Polish patients suffering from rectal cancer.Material and methods. EORTC QLQ-CR29 module comprises 29 questions, and was adapted to Polish cultural conditions based on EORTC procedure. Data collected from 20 patients were analyzed, their agreement with theoretical and empirical structure was assessed. Convergent and discriminant validity were analyzed with multi trait scaling.Reliability was assessed with Cronbach alpha coefficient. Known group validity was assessed in terms of differences between men and women, and between stoma and non-stoma patients. Exact Mann-Whitney test was used. P values lower than 0.05 were considered significant.Results. Scales built on bases of empirical model of module had higher validity and reliability than those based on theoretical model.There were no significant differences between men and women in health-related quality of life. Significantly higher values were observed in non-stoma patients on body image scale and for leakage of stool item. Reversed relationship was observed in case of abdominal and buttocks pain, as well as embarrassment because of bowel movements.Conclusions. Module CR29 is a valid and reliable tool, which enables standardized measurement of treatment effects, suggested for use as main tool measuring impact of disease itself and applied treatment on health-related quality of life of rectal cancer patients.

5

Is the Quality of Judging in Women Artistic Gymnastics Equivalent at Major Competitions of Different Levels?

88%

Bučar Pajek M., Čuk I., Pajek J., Kovač M., Leskošek B.

Journal of Human Kinetics

|

2013

|

vol. 37

|

issue 1

173-181

EN

In the present study, the reliability and validity of judging at the European championship in Berlin 2011 were analysed and the results were compared to a different level gymnastic competition - Universiade 2009 in Belgrade. For reliability and consistency assessment, mean absolute judge deviation from final execution score, Cronbach’s alpha coefficient, intra-class correlations (ICC) and Armor’s theta coefficient were calculated. For validity assessment mean deviations of judges’ scores, Kendall’s coefficient of concordance W and ANOVA eta-squared values were used. For Berlin 2011 in general Cronbach’s alpha was above 0.95, minima of item-total correlations were above 0.8, and the ICC of average scores and Armor’s theta were above 0.94. Comparison with Universiade 2009 identified vault and floor scores at both competitions to have inferior reliability indices. At both competitions average deviations of judges from the final E score were close to zero (p=0.84) but Berlin 2011 competition showed a higher number of apparatuses with significant Kendall’s W (5 vs. 2 for Universiade 2009) and higher eta-squared values indicating higher judge panel bias in all-round and apparatus finals. In conclusion, the quality of judging was comparable at examined gymnastics competitions of different levels. Further work must be done to analyse the inferior results at vault and floor apparatuses.

6

Evaluation of a Polish Version of the Dundee Ready Education Environment Measure

88%

Zawiślak D., Żur-Wyrozumska K., Habera M., Skrzypiec K., Pac A., Cebula G., Zawiślak D., Żur-Wyrozumska K., Habera M., Skrzypiec K., Pac A., Cebula G.

Folia Medica Cracoviensia

|

2021

|

vol. 61

|

issue 1

7

Psychometric Properties of The Greek Version of the Test of Performance Strategies-Competition Scale (TOPS-CS)

88%

Katsikas C., Donti O., Psychountaki M.

Journal of Human Kinetics

|

2011

|

vol. 29

133-139

EN

The aim of the present study was to examine the psychometric properties of the Test of Performance Strategies-Competition scale (TOPS-CS; Thomas et al., 1999) in Greek athletic population. The TOPS-CS was designed to assess eight psychological strategies used by athletes in competition (activation, automaticity, emotional control, goal-setting, imagery, negative thinking, relaxation and self-talk). In order to evaluate the psychometric properties of the inventory, two different research studies were conducted in two different age groups (n1=382 athletes, aged 16 to 20 years and n2=343 athletes, aged 12 to 15 years). Furthermore, 263 athletes, (aged 16 to 20 years) completed the TOPS-CS, purposing to perform confirmatory factor analysis. The results of the first study supported the initial factorial structure of the TOPS-CS for athletes aged 16-20 years. Reliability analysis also provided adequate evidence for the internal consistency and stability of the scale for Greek athletes of this age. However, for athletes aged 12 to 15 years, the validity and reliability of the inventory were questionable and further research is required.

8

Evaluation of Consecutive Maximum Contractions as a Test of Neuromuscular Function

75%

Suzovic D., Nedeljkovic A., Pazin N., Planic N., Jaric S.

Journal of Human Kinetics

|

2008

|

vol. 20

51-61

EN

The aim of the study was to conduct a preliminary evaluation of consecutive maximum contractions (CMC) as a test of neuromuscular function. Eleven participants performed externally paced isometric CMC (i.e., a series of consecutive maximum force exertions and relaxations) of the quadriceps muscle. The derived variables included the peak forces, and the maximum rates of force development and relaxation. The results revealed high within-day reliability of CMC variables, while their correlations with the jumping performance were consistently higher than those of the variables of the standard strength test (SST). CMC variables also showed fairly stable values across a wide range of frequencies, while their peak force revealed a strong relationship with maximum force of SST despite being about considerably lower. Therefore, we conclude that CMC could be developed into a standard test of neuromuscular function. In addition to capturing the muscle actions based on different neural activation pattern than SST, CMC could also be based on simpler testing procedure, lower force exertion, and self-selected frequencies.

Refine search results

Lower-Limb Power cannot be Estimated Accurately from Vertical Jump Tests

Reliabity and Validity of the Trichotomous and 2×2 Achievement Goal Models in Turkish University Physical Activity Settings

Validity and Reproducibility of the Sargent Jump Test in the Assessment of Explosive Strength in Soccer Players

Adaptation of Quality of Life Module EORTC QLQ-CR29 for Polish Patients with Rectal Cancer - Initial Assessment of Validity and Raeliability

Is the Quality of Judging in Women Artistic Gymnastics Equivalent at Major Competitions of Different Levels?

Evaluation of a Polish Version of the Dundee Ready Education Environment Measure

Psychometric Properties of The Greek Version of the Test of Performance Strategies-Competition Scale (TOPS-CS)

Evaluation of Consecutive Maximum Contractions as a Test of Neuromuscular Function