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Anna Beth Doyle Heather Lawford Dorothy Markiewicz 《Journal of research on adolescence》2009,19(4):690-714
Self‐reported attachment styles with mother, father, best friend, and romantic partner were assessed longitudinally across adolescence. Three cohorts (ages 13, 16, and 19 years; N=373) from a community sample were followed across 2 years. There was only one change in attachment styles with age: the oldest adolescents were more dismissive than the younger. Adolescents were more secure with mother than with father, and most dismissive and fearful with father. Boys were more dismissing than girls, who were more fearful with a romantic partner (n=158). Across time, attachment insecurity with father was associated with insecurity with a best friend. Attachment insecurity with a romantic partner was associated primarily with insecurity with friend, but changes over time tended to be associated with insecurity with mother. Results support the view of a differentiated hierarchy of attachment figures in adolescence, with the quality of parental attachment contributing to close extra‐familial relationships. 相似文献
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The purpose of this paper is to characterize optimal designs under a multivariate linear model with additional nuisance parameters.
We give relationships between optimality of designs in univariate models and in their multivariate extensions with known and
partially known dispersion matrices. 相似文献
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Filipiak and Markiewicz (2012) proved the universal optimality of circular weakly neighbor balanced designs (CWNBDs) under the interference model with fixed neighbor effects among the class of complete block designs. In two special cases where a CWNBD cannot exist, Filipiak et al. (2012) characterized D-optimal designs. The aim of this paper is to show the universal optimality of CWNBDs and to characterize D-optimal designs under the interference model with random neighbor effects. 相似文献
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The concept of neighbor designs was introduced and defined by Rees (1967) along with giving some methods of their construction. Henceforth, many methods of construction of neighbor designs as well as of their generalizations are available in the literature. However, there are only few results on their optimality. Therefore, the purpose of this article is to give an overview of study on this problem. Recent results on optimality of specified neighbor balanced designs under various interference models with block effects are presented and then these results are compared with respective models where block effects are not significant. 相似文献
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In this paper, we derive characterization of admissible and linearly sufficient estimators of a vector of linear estimable
functions of parameters in a partitioned linear model. Then, we compare this class of estimators with the class of admissible
and linearly sufficient estimators of the same vector of linear parametric functions in a reduced linear model. We show that
these classes are equal with probability one. 相似文献
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