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101.
Richard Lowry David Sleet Carlton Duncan Ken Powell Lloyd Kolbe 《Educational Psychology Review》1995,7(1):7-39
Interpersonal violence among youth is a growing problem in many communities and schools across the nation. The causes of violence are multiple and complex. This paper examines the extent and nature of interpersonal violence among youth as well as the individual and societal factors which contribute to youth violence. Adolescents are disproportionately represented as both victims and perpetrators of fatal and nonfatal assaultive violence. Homicide rates among young men in the United States are vastly greater than those of other Western industrialized nations. Persons age 12–24 years face the highest risk of nonfatal violent victimization of any segment of our society. Arrest rates for homicide, rape, robbery, and aggravated assault peak among adolescents and young adults. Further, arrest rates for murder and other violent crimes have increased substantially among this age group since the mid-1980s. Effective prevention programs will require combinations of interventions aimed at multiple factors and delivered through many channels. 相似文献
102.
Child sexual abuse: A study of prevalence in Great Britain 总被引:8,自引:0,他引:8
M.B. Anthony W. Baker M.R.C. Psych. B.SC. Sylvia P. Duncan B.Phil. Clin. Psych. 《Child abuse & neglect》1985,9(4):457-467
Of 2019 men and women (aged 15 years and over) interviewed as part of a MORI Survey of a nationally representative sample of Great Britain, 10% reported that they had been sexually abused before the age of 16 (12% of females; 8% of males). There was no increased risk associated with specific social class categories or area of residence. For all types of sexual abuse, the mean age of victims when first abused was significantly lower for females. Subjective reports of the effects of sexual abuse indicated that the majority (51%) felt harmed by the experience, while only 4% reported that it had improved the quality of their life. We estimate that there are over 4.5 million adults in Great Britain who were sexually abused as children, and that a potential 1,117,000 children will be sexually abused before they are 15 years of age. At least 143,000 of these will be abused within the family. The social and mental health implications are enormous, and the authors suggest that an effective intervention and prevention policy is urgently required. 相似文献
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104.
The purpose of this research was to establish the concurrent and predictive validity of the Phelps Kindergarten Readiness Scale, Second Edition (PKRS‐II; L. Phelps, 2003). Seventy‐four kindergarten students of diverse ethnic backgrounds enrolled in a northeastern suburban school participated in the study. The concurrent administration of the PKRS‐II and the Woodcock‐Johnson III Brief Intellectual Ability Scale (R.W. Woodcock, K.S. McGrew, & N. Mather, 2001a) occurred in the fall of the kindergarten year. To assess predictive validity, the Woodcock Johnson III Tests of Achievement (R.W. Woodcock, K.S. McGrew, & N. Mather, 2001b) was administered in the spring of that year. All concurrent and predictive correlations were significant. Based on the results of this study, the PKRS‐II may be used with confidence to screen for children who may be at risk for academic difficulties. © 2005 Wiley Periodicals, Inc. Psychol Schs 42: 355–359, 2005. 相似文献
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107.
Duncan Smith 《Public Library Quarterly》2013,32(4):257-269
As public libraries strive to remain essential parts of their communities in tough economic times, the centrality of books to the library's mission is explored. 相似文献
108.
Conventional covariance structure analysis, such as factor analysis, is often applied to data that are obtained in a hierarchical fashion, such as siblings observed within families. Multivariate modeling of such data, however, is most frequently done as if the data were obtained as a simple random sample from a single population. An alternative specification is presented that explicitly models the within‐level and between‐level covariance matrices in familial antisocial behavior. Sibling data from the National Youth Survey, a national probability sample of youth, were used to specify a multilevel covariance structure analysis of sibling antisocial behavior. Results demonstrate homogeneity in antisocial behavior within sibling clusters but heterogeneity across families. These analyses highlight potential pitfalls of ignoring issues of independence and demonstrate how conventional covariance structure software can be easily adapted to handle hierarchical models, providing a large set of new analysis possibilities for multilevel data. 相似文献
109.
Scott J. Duncan Grant Schofield Elizabeth K. Duncan Erica A. Hinckson 《Research quarterly for exercise and sport》2013,84(5):420-428
The objective of this study was to investigate the effects of age group, walking speed, and body composition on the accuracy of pedometer-determined step counts in children. Eighty-five participants (43 boys, 42 girls), ages 5–7 and 9–11 years, walked on a treadmill for two-minute bouts at speeds of 42, 66, and 90 m·min-1 while wearing a spring-levered (Yamax SW-200) and a piezoelectric (New Lifestyles NL-2000) pedometer. The number of steps taken during each bout was also recorded using a hand counter. Body mass index (BMI) was calculated from height and mass, and percentage of body fat (%BF) was determined using hand-to-foot bioelectrical impedance analysis. The tilt angle of the pedometer was assessed using a magnetic protractor. Both pedometers performed well at 66 and 90 m·min-1, but undercounted steps by approximately 20% at 42 m·min-1. Although age group, BMI, waist circumference, and %BF did not affect pedometer accuracy, children with large pedometer tilt angles (≥ 10°) showed significantly greater percent bias than those with small tilt angles (< 10°). We suggest that the style of waistband on the child's clothing is a more important determinant of tilt angle and thus pedometer accuracy than body composition. Our results also indicate that the NL-2000 pedometer provides similar accuracy and better precision than the SW-200 pedometer, especially in children with large tilt angles. We conclude that fastening pedometers to a firm elastic belt may improve stability and reduce undercounting in young people. 相似文献
110.
Elizabeth Sarah Bryant Rob S. James Samantha Louise Birch Mike Duncan 《Journal of sports sciences》2013,31(19):1775-1782
AbstractFundamental movement skills (FMS) have been assessed in children in order to investigate the issues of the low proportion of children who meet physical activity (PA) guidelines and rising levels of obesity. The aim of this research was to identify whether previous or current FMS level is a better predictor of PA levels and weight status in children. In January 2012 (year 1), 281 children were recruited from one primary school in the West Midlands, UK. Children performed eight FMS three times, which were videoed and assessed using a subjective checklist. Sprint speed and jump height were measured objectively. Height and mass were measured to calculate the body mass index to determine the weight status. Skinfold calliper readings were used to calculate body fat percentage. One year later, in January 2013, all these tests were repeated on the same children, with the additional collection of PA data via the use of pedometers. Following multiple linear regression, it was identified that prior mastery in FMS was a better predictor of current PA, whereas current FMS was a better predictor of current weight status. Overall, FMS mastery is needed in childhood to be able to participate in PA and maintain a healthy weight status. 相似文献