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21.
Leslie D. Leve David C. R. Kerr Daniel Shaw Xiaojia Ge Jenae M. Neiderhiser Laura V. Scaramella John B. Reid Rand Conger David Reiss 《Child development》2010,81(1):340-356
To further the understanding of the effects of early experiences, 9-month-old infants were observed during a frustration task. The analytical sample was composed of 348 linked triads of participants (adoptive parents, adopted child, and birth parent[s]) from a prospective adoption study. It was hypothesized that genetic risk for externalizing problems and affect dysregulation in the adoptive parents would independently and interactively predict a known precursor to externalizing problems: heightened infant attention to frustrating events. Results supported the moderation hypotheses involving adoptive mother affect dysregulation: Infants at genetic risk showed heightened attention to frustrating events only when the adoptive mother had higher levels of anxious and depressive symptoms. The Genotype × Environment interaction pattern held when substance use during pregnancy was considered. 相似文献
22.
Katie J. Thralls Suneeta Godbole Todd M. Manini Eileen Johnson Loki Natarajan Jacqueline Kerr 《Journal of sports sciences》2013,31(20):2309-2317
ABSTRACTThis study compared five different methods for analyzing accelerometer-measured physical activity (PA) in older adults and assessed the relationship between changes in PA and changes in physical function and depressive symptoms for each method. Older adult females (N = 144, Mage = 83.3 ± 6.4yrs) wore hip accelerometers for six days and completed measures of physical function and depressive symptoms at baseline and six months. Accelerometry data were processed by five methods to estimate PA: 1041 vertical axis cut-point, 15-second vector magnitude (VM) cut-point, 1-second VM algorithm (Activity Index (AI)), machine learned walking algorithm, and individualized cut-point derived from a 400-meter walk. Generalized estimating equations compared PA minutes across methods and showed significant differences between some methods but not others; methods estimated 6-month changes in PA ranging from 4 minutes to over 20 minutes. Linear mixed models for each method tested associations between changes in PA and health. All methods, except the individualized cut-point, had a significant relationship between change in PA and improved physical function and depressive symptoms. This study is among the first to compare accelerometry processing methods and their relationship to health. It is important to recognize the differences in PA estimates and relationship to health outcomes based on data processing method.Abbreviation: Machine Learning (ML); Short Physical Performance Battery (SPPB); Center of Epidemiologic Studies Depression Scale (CES-D); Physical Activity (PA); Activity Index (AI); Activities of Daily Living (ADL) 相似文献
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Barbara A. Kerr 《Journal of Career Development》1988,14(4):259-268
Barbara A. Kerr is an Associate Professor at the University of Iowa, N346 Lindquist, Iowa City, IA 52242. Address requests for reprints to the author. 相似文献
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26.
Technology,teachers, and the search for school reform 总被引:1,自引:0,他引:1
Educational technologists have increasingly moved away from direct involvement in the world of the classroom teacher in recent
years. The assumptions that technologists and teachers make about educational technology and about teaching now diverge markedly.
At the same time, new reform proposals have suggested ways to restructure schools that would enhance the role of teachers
as instructional decision-makers and offer them more control over their professional work life. Elements of the reform agenda
are characterized, and ways are described in which educational technologists might work together with teachers in pursuit
of reform goals. These include: (1) preparation of models for teaching-with-technology; (2) design of intelligent software;
(3) creation of technologically based tools to support teachers' professional work and development; and (4) improvement of
research about technology in education.
Note:An earlier version of this paper was presented at the Annual Conference of the Association for Educational Communications
and Technology, Dallas, Texas, February 4, 1989. 相似文献
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Disruptiveness, Friends' Characteristics, and Delinquency in Early Adolescence: A Test of Two Competing Models of Development 总被引:3,自引:0,他引:3
Frank Vitaro Richard E. Tremblay Margaret Kerr Linda Pagani William M. Bukowski 《Child development》1997,68(4):676-689
This study tested 2 competing models of friends' influence on the development of delinquency in disruptive boys. In so diong, we examined whether highly disruptive, moderately diseuptive, moderately conforming, and highly conforming boys' delinquecy increased or decreased depeniding on their friends' characteristics. A sample of 868 boys was classified into the 4 groups according to teacher tating at ages 11 and 12. Each group was then subdivided by mutual friends' peer-rate aggressiveness-disturbance at the same ages: aggressive-disturbing friends, average friends, nonaggressive-nondisturbing friends, and no friends. Subgroups were mext compared on self-reported delinquency at age 13 while controlling for average self-reported delinquency and socioeconomic variables at ages 11 and 12. Results indicate that moderately disruptive boys with aggressivedisturbive friends were more delinquent at age 13 than other subgroups of moderately disruptive boys. Highly disrupitve and confroming boys, however, were unaffected by their friends' characteristics. We conclude that the results partially support each theoretical model, suggesting that both individual characteristics and deviant peer association might play causal roles. 相似文献
29.
Clark Kerr 《Higher Education》1990,19(1):1-19
Several nations are currently considering privatization of parts of their higher education systems. This paper, mainly based on the American experience, examines privatizing public institutions as an alternative to establishing solely private institutions.Institutions are analyzed along four dimensions: (1) ownership (public or private); (2) control (external or internal); (3) financing (public or private funds); and (4) mechanisms for public financing (who controls fund distribution and how). There are varying mixtures along these four dimensions both within countries and around the world, with the American system exhibiting the widest range of combinations. Six categories are described, including four common in the U.S.: I. Independent private, where institutions are independent in ownership, in control, and in basic financing; II. Dependent private, independent in ownership and financing but dependent in control; III. Independent public, dependent in ownership but independent in control and substantially independent in financing; IV. Semi-independent public (state/guild type), dependent in ownership, mixed in control, and heavily dependent in financing (less common in the U.S., but typical of Italy and Latin America); V. Semi-independent public (state/trustee/guild type), where control is shared among state, academic guilds and lay boards of trustees but with mainly state-controlled financing; and VI. Dependent public, the model in the Communist nations.Kerr traces the historical path that led to the mixed American system and examines some of its positive consequences, which include institutional autonomy, diversity, and flexibility. Negative results include possible over-responsiveness to short-term pressures, as from the labor market or student preferences for courses of study, and from supporting business or industry.The author concludes that the American experience with privatized public institutions may serve as a model for those elsewhere who now seek greater institutional differentiation, autonomy, and flexibility within national systems of higher education. 相似文献
30.