Changes Over Time in the Determinants of Sport Commitment

1998 ◽  
Vol 10 (4) ◽  
pp. 356-365 ◽  
Author(s):  
Paul J. Carpenter ◽  
Tara K. Scanlan
Keyword(s):  
High School ◽  
Regression Analysis ◽  
Multiple Regression Analysis ◽  
A Priori ◽  
Soccer Players ◽  
Male And Female ◽  
Sport Commitment ◽  
The Mean ◽  
Changes Over Time ◽  
Over Time

The purpose of this study was to examine whether changes over time in the determinants of sport commitment would be related to predicted changes in commitment. Male and female (N = 103) high school soccer players completed surveys toward the middle and at the end of their regular season. A simultaneous multiple regression analysis indicated that commitment was significantly predicted by changes in involvement opportunities. Examination of the mean magnitude of changes in the determinants and corresponding changes in commitment using a series of correlated t-tests revealed significant effects for sport enjoyment and involvement opportunities. For those players whose sport enjoyment and involvement opportunities had declined, there was a corresponding decrease in their commitment. For those players whose involvement opportunities had increased, there was a corresponding increase in their commitment. Combined, these results provided support for a priori hypotheses regarding changes in the determinants of commitment over time and corresponding changes in commitment.

Sound Pressure Levels Experienced by the High School Band Director

2004 ◽  
Vol 19 (3) ◽  
pp. 109-115 ◽  
Author(s):  
Douglas T Owens
Keyword(s):  
High School ◽  
Regression Analysis ◽  
Multiple Regression Analysis ◽  
Sound Pressure ◽  
Noise Exposure ◽  
Band Directors ◽  
High School Band ◽  
Industrial Noise ◽  
Sound Pressure Levels ◽  
The Mean

Portable noise dosimeters were used to determine the levels of noise exposure experienced by high school band directors. In addition, sound reverberation times were measured to determine the appropriateness of existing acoustic conditions for the band rehearsal environment. A total of 63 sound pressure measurements were taken during the rehearsals of 10 high school bands located in cities along the Front Range of Colorado. Single sample t-tests and effect size calculations were employed to compare the sound pressure levels of all band rehearsals with the industrial noise standards of the Occupational Health and Safety Administration (OSHA), the American Conference of Governmental and Industrial Hygienists (ACGIH), and the National Institute of Occupational Safety and Health (NIOSH). Multiple regression analysis was used to determine the effect of room environmental factors on the sound pressure levels. While conducting high school ensembles, 60% of participating band directors experienced sound pressure levels at or exceeding 90 dBA. These levels and the mean noise doses and 8-hour projected noise doses observed were within the OSHA standards for industrial noise exposure, but exceeded the industrial noise exposure standards set by ACGIH and NIOSH. Multiple regression analysis performed on the room volume (cubic feet), the level of acoustic treatment, and the mean reverberation time were found to predict 77.8% of the variance in sound pressure levels in this study.

Canadian Exceptionalism: Explaining Differences over Time in Provincial and Federal Voter Turnout

2001 ◽  
Vol 34 (2) ◽  
pp. 299-319 ◽  
Author(s):  
Donley T. Studlar
Keyword(s):  
Regression Analysis ◽  
Population Density ◽  
Multiple Regression Analysis ◽  
Voter Turnout ◽  
The Political ◽  
Federal Level ◽  
Industrial Democracies ◽  
Different Types ◽  
Over Time ◽  
Cross National

Canada is unusual among advanced industrial democracies in having some provinces which regularly have greater voter turnouts for provincial than for federal elections. Provincial and federal turnouts by province in Canada are analyzed for the 1945-1998 period using multiple regression analysis, both for each set of elections and by comparing differences between the two. Federal turnout has declined over the years but provincial turnout appears to have increased slightly. Although the effects found here largely confirm previous findings about the relative effects of different types of variables found for the Canadian federal level only, several of the political explanations previously supported in cross-national research find less support. Instead, region, population density, months since the last federal or provincial election, and season of the year generally have greater and sometimes more consistent effects. This suggests the need for more studies of turnout in democracies at sub-central levels.

Relationship of Specific and Nonspecific Variables to Successful Basketball Performance among High School Players

1987 ◽  
Vol 64 (3) ◽  
pp. 823-827 ◽  
Author(s):  
Mark A. Brooks ◽  
Larry W. Boleach ◽  
J. L. Mayhew
Keyword(s):  
High School ◽  
Regression Analysis ◽  
Reaction Time ◽  
Discriminant Analysis ◽  
Multiple Regression Analysis ◽  
Canonical Correlation ◽  
Vertical Jump ◽  
The Third ◽  
Male High School ◽  
Relationship Of

To determine the predictive potential of selected cognitive and psychomotor variables to estimate basketball performance, 50 male high school players from 3 schools in the same conference were evaluated. One team won the Iowa state championship; the second team had a 12 and 10 record while the third team had a 4 and 16 record. The 3 coaches rated each player's ability from 1 to 10. Multiple regression analysis to predict coaches' rating of ability from vertical jump, hand reaction time, weight, and playing experience gave an R of .76. However, discriminant analysis to classify players on the 3 teams indicated as important knowledge about basketball, dribbling, shooting accuracy, and height. The canonical correlation for the 4 variables and team membership was .64. Using the 4 variables, 60% of the players could be correctly classified to their teams.

scholarly journals Proposing an Endotracheal Tube Selection Tool Based on Multivariate Analysis of Airway Imaging

2020 ◽  
pp. 014556131990039
Author(s):  
Yousef Aljathlany ◽  
Abdullah Aljasser ◽  
Abdullah Alhelali ◽  
Manal Bukhari ◽  
Mohammed Almohizea ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Regression Analysis ◽  
Endotracheal Tube ◽  
Multiple Regression Analysis ◽  
Multiple Regression ◽  
Care Center ◽  
Tertiary Care ◽  
Transverse Diameter ◽  
Cross Sectional ◽  
The Mean

Objectives: We aimed to comprehensively investigate different upper airway segments in adults, determine the predictors of the size of each segment, and identify an appropriate endotracheal tube (ETT) size chart. Study Design: Retrospective chart review. Setting: Tertiary care center. Materials and Methods: The data for patients aged >18 years who underwent neck computed tomography were screened. Patients with existing tumors, trauma, or any pathology that can alter the normal airway anatomy and those with intubation, tracheostomy, or nasogastric tubes were excluded. Computed tomography software was used to measure the anteroposterior diameter (APD), transverse diameter (TD), and cross-sectional area (CSA) at the glottic, proximal subglottic, distal subglottic, and tracheal levels. Multiple regression analysis was used to identify the predictors of the airway size. Results: One hundred patients were reviewed. The TD was consistently smaller than or equal to the APD at each level in all but 3 patients. The mean CSA and TD (170 mm2 and 11.3 mm, respectively) of the glottis indicated that the glottis was most often the narrowest level, followed by the proximal subglottis where the mean CSA and TD were 192.1 mm2 and 12.7 mm, respectively. Moreover, the mean APD was the smallest at the level of the trachea (20.1 mm). Multiple regression analysis confirmed that height and sex were the predominant predictors of measurements for the 4 airway segments. In addition, age was associated with the TD and CSA of the distal subglottic and tracheal segments, respectively. Conclusion: One-third of our participants exhibited a proximal subglottic diameter that was equal to or smaller than the glottic diameter. Our findings also suggested that the height and sex of the patients are important variables for the selection of an appropriate ETT size.

Anxiety and Personal Control Effects in Biracial Dyads

1977 ◽  
Vol 41 (1) ◽  
pp. 239-245
Author(s):  
Cardell K. Jacobson
Keyword(s):  
High School ◽  
Black Students ◽  
Junior High School ◽  
Junior High ◽  
Personal Control ◽  
Initial Testing ◽  
Initial Task ◽  
Changes Over Time ◽  
Over Time

36 black and 36 white junior high school boys participated in a biracial group task. Based on initial testing on the task the subjects were paired with a partner of the opposite race. One third were paired with a slower partner, one third with a faster partner, and one third with a partner of approximately equal ability. However, debilitating anxiety among some of the black students affected their performance on the initial task so that the performance biracially was confounded. The implications of this anxiety and its changes over time are, discussed briefly.

Multiple regression analysis of factors influencing dominant hand grip strength in an adult Malaysian population

2011 ◽  
Vol 37 (1) ◽  
pp. 65-70 ◽  
Author(s):  
M. G. Hossain ◽  
R. Zyroul ◽  
B. P. Pereira ◽  
T. Kamarul
Keyword(s):  
Regression Analysis ◽  
Multiple Regression Analysis ◽  
Grip Strength ◽  
Multiple Regression ◽  
Hand Grip Strength ◽  
Dominant Hand ◽  
Asian Ethnicity ◽  
Malaysian Population ◽  
Hand Grip ◽  
The Mean

Grip strength is an important measure used to monitor the progression of a condition, and to evaluate outcomes of treatment. We assessed how various physical and social factors predict normal grip strength in an adult Malaysian population of mixed Asian ethnicity (254 men, 246 women). Grip strength was recorded using the Jamar dynamometer. The mean grip strength for the dominant hand was 29.8 kg for men and 17.6 kg for women. Multiple regression analysis demonstrated that the dominant hand grip strength was positively associated with height and body mass index, and negatively associated with age for both sexes. Dominant hand grip strength was related to work status for men ( p < 0.05) but not for women. However, there was no difference in grip strength among ethnic groups.

Changes in Private Sector Electroconvulsive Treatment in Australia

2006 ◽  
Vol 40 (4) ◽  
pp. 362-367 ◽  
Author(s):  
Darrel P. Doessel ◽  
Roman W. Scheurer ◽  
David C. Chant ◽  
Harvey A. Whiteford
Keyword(s):  
Regression Analysis ◽  
Descriptive Study ◽  
Clear Pattern ◽  
Rural And Remote ◽  
Electroconvulsive Treatment ◽  
Utilization Patterns ◽  
Analyse Data ◽  
Changes Over Time ◽  
Over Time ◽  
State Territory

Objectives: This paper reports on changes, over time and between states, in the use of electroconvulsive therapy (ECT) in the private psychiatric sector in Australia between 1984 and 2004. Method: Data for ECT services, and all specialist psychiatry services provided under the Medicare system, have been analysed in absolute numbers and as utilization rates. Results: Changes in the use of ECT over time are different from other services provided by private psychiatrists. As in other countries, the use of ECT initially declined in period studied but has increased in recent years. In addition, there is a clear pattern of differential use of ECT between the states and territories. Conclusions: This descriptive study cannot ‘explain’ the results obtained: other data, incorporated into an explanatory model using regression analysis, are needed to determine the factors underlying the utilization patterns obtained in this study. Thus, further work is needed. Furthermore, it is important to analyse data at a lower level of geographical aggregation than that of the state/territory: this (state/territory) aggregation conceals differences in utilization between metropolitan, minor city, rural and remote regions of the country.

scholarly journals Hockey Concussion Education Project, Part 1. Susceptibility-weighted imaging study in male and female ice hockey players over a single season

2014 ◽  
Vol 120 (4) ◽  
pp. 864-872 ◽  
Author(s):  
Karl G. Helmer ◽  
Ofer Pasternak ◽  
Eli Fredman ◽  
Ronny I. Preciado ◽  
Inga K. Koerte ◽  
...  
Keyword(s):  
Ice Hockey ◽  
Susceptibility Weighted Imaging ◽  
Male And Female ◽  
Time Points ◽  
Significant Difference ◽  
Hockey Players ◽  
Changes Over Time ◽  
Male Subjects ◽  
Over Time ◽  
Female Subjects

Object Concussion, or mild traumatic brain injury (mTBI), is a commonly occurring sports-related injury, especially in contact sports such as hockey. Cerebral microbleeds (CMBs), which appear as small, hypointense lesions on T2*-weighted images, can result from TBI. The authors use susceptibility-weighted imaging (SWI) to automatically detect small hypointensities that may be subtle signs of chronic and acute damage due to both subconcussive and concussive injury. The goal was to investigate how the burden of these hypointensities changes over time, over a playing season, and postconcussion, in comparison with subjects who did not suffer a medically observed and diagnosed concussion. Methods Images were obtained in 45 university-level adult male and female ice hockey players before and after a single Canadian Interuniversity Sports season. In addition, 11 subjects (5 men and 6 women) underwent imaging at 72 hours, 2 weeks, and 2 months after concussion. To identify subtle changes in brain tissue and potential CMBs, nonvessel clusters of hypointensities on SWI were automatically identified, and a hypointensity burden index was calculated for all subjects at the beginning of the season (BOS), the end of the season (EOS), and at postconcussion time points (where applicable). Results A statistically significant increase in the hypointensity burden, relative to the BOS, was observed for male subjects with concussions at the 2-week postconcussion time point. A smaller, nonsignificant rise in the burden for female subjects with concussions was also observed within the same time period. There were no significant changes in burden for nonconcussed subjects of either sex between the BOS and EOS time points. However, there was a statistically significant difference in the burden between male and female subjects in the nonconcussed group at both the BOS and EOS time points, with males having a higher burden. Conclusions This method extends the utility of SWI from the enhancement and detection of larger (> 5 mm) CMBs, which are often observed in more severe cases of TBI, to cases involving smaller lesions in which visual detection of injury is difficult. The hypointensity burden metric proposed here shows statistically significant changes over time in the male subjects. A smaller, nonsignificant increase in the burden metric was observed in the female subjects.

Sign in / Sign up

Export Citation Format

Share Document