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Regression models for survival data are often specified from the hazard function while classical regression analysis of quantitative outcomes focuses on the mean value (possibly after suitable transformations). Methods for regression analysis of mean survival time and the related quantity, the restricted mean survival time, are reviewed and compared to a method based on pseudo-observations. Both Monte Carlo simulations and two real data sets are studied. It is concluded that while existing methods may be superior for analysis of the mean, pseudo-observations seem well suited when the restricted mean is studied. 相似文献
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Research on relational aggression has drawn attention to how girls may be likely to aggress, but the role of gender is not fully understood. There are opposing views regarding whether relational aggression is most common among girls. Current findings demonstrate that when gender differences in relational aggression are assessed with peer nominations, gender differences favoring girls are more likely: (1) in adolescence than childhood; and (2) when statistical overlap with overt aggression is controlled. Results also indicated that associations of relational aggression with peer acceptance depend on the aggressor's gender, the peer rater's gender, and whether overlap with overt aggression is controlled. Associations of relational aggression with lower acceptance became non‐significant when overt aggression was controlled, suggesting that relational aggression displayed in isolation may not damage acceptance. In fact, in mid‐adolescence, girls’ relational aggression predicted greater liking by boys. Reducing relational aggression among adolescent girls may be especially challenging if the behavior is linked with acceptance by boys. 相似文献
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Jens Bonke Mette Deding Mette Lausten Leslie S. Stratton 《Social science quarterly》2008,89(4):1023-1043
Objective. Focusing on housework activities, we hypothesize that the degree of specialization is influenced by economic notions of efficiency, as well as by time constraints and egalitarian values. Methods. Employing time‐use data on U.S. and Danish couples, we construct a composite index measure of intra‐household specialization. We analyze the comparability of reported time use and our specialization index using different types of data, and then model specialization using a multivariate two‐limit Tobit. Results. We find evidence that Danish households specialize less than U.S. households and that children, particularly preschool‐aged children, are associated with significantly increased specialization in the United States but not in Denmark. Conclusions. We postulate that the more egalitarian social structure in Scandinavia is a driving force behind the lower rate of specialization observed in Denmark. Further, we believe the subsidized child‐care services provided by the Danish welfare system reduce the impact children have on specialization in ordinary housework tasks. 相似文献
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Infants of Depressed Mothers Show Reduced Gaze Activity During Mother–Infant Interaction at 4 Months 下载免费PDF全文
Mette S. Væver Marianne T. Krogh Johanne Smith‐Nielsen Torben T. Christensen Anne Tharner 《Infancy》2015,20(4):445-454
Gaze is one of the main means of communication in young infants, and it has been shown to be important for subsequent socio‐emotional and cognitive development. Maternal depression is a well‐known risk factor for disrupting mother–infant interactions, but findings regarding gaze behavior in infants of depressed versus nondepressed mothers have been ambiguous. In this study, we examined gaze duration and activity in a sample of 27 infants of mothers with postpartum depression (PPD) and 49 infants of nondepressed mothers. Maternal depressive symptoms were assessed with the Edinburgh Postnatal Depression Scale, and diagnoses were confirmed in clinical interview. Infant gaze was assessed during 4‐month face‐to‐face interactions using continuous timed‐event coding with high temporal resolution. Although we found no differences in gaze duration, infants of PPD mothers had both significantly less Gaze On and also less Gaze Off events. Findings suggest that PPD is related to reduced gaze activity during mother–infant interaction in 4‐month‐olds. This reduced activity may have long‐term negative consequences for child development. 相似文献
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Mette Louise Berg 《Identities: Global Studies in Culture and Power》2015,22(3):303-317
Based on an ethnographic study of transnational networks of alumni of an academically selective boarding school in Havana, this article explores the nexus between mobility, schooling and belonging in the context of socialist Cuba and its diaspora. Drawing on Goffman’s work, I argue that the boarding school experience was transformative; it facilitated or consolidated social mobility for its pupils, which later, for many, led to geographic mobility in the form of study and work outside Cuba. After graduating, alumni continue to identify with the school and to reproduce their alumni identities. The affective webs of belonging forged through family links and friendships fostered at the school constitute emotionally sustaining networks that also provide material support after migrating. I propose that the school represents a site of identification for a globally dispersed non-national diaspora and argue that migration scholars need to embed international migration within people’s lives more broadly. 相似文献
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Michelle Naden Klayne Rasmussen Patrick Morrissette Kurt Johns 《Journal of marital and family therapy》1997,23(4):389-398
Following Gurman (1981), this study reports on authors and topics of interest in prominent marriage and family therapy journals from 1980 through 1995. Fifteen of the 25 institutions that produced the greatest number of authors prior to 1978 continued to be among the top 25 between 1980 and 1995, and the 25 leading institutions produced 29.5% of articles from 1980 to 1995. Most authors held positions in university settings and taught in programs with a marriage and family therapy focus. Clinical issues were the most common focus of articles (61%), and one-third of all articles were research reports. 相似文献
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Brian Rasmussen 《Clinical Social Work Journal》1995,23(2):139-149
Metaphor is seen to play a significant role in psychoanalytic theory and technique. While acknowledging this view, this paper examines the differences in which individuals of varying developmental profiles, experience, comprehend and use metaphor in the context of psychotherapy. Differences in the capacity to play, adaptively regress, regulate affect, maintain ego boundaries, and symbolize, are found to affect capacities to employ those figures of speech in words or phrases literally denoting one type of object or idea but used in place of others by suggesting likenesses or analogies. A rationale for differential use of interventions involving metaphor is offered. 相似文献