Stochastic blockmodels: First steps

A stochastic model is proposed for social networks in which the actors in a network are partitioned into subgroups called blocks. The model provides a stochastic generalization of the blockmodel. Estimation techniques are developed for the special case of a single relation social network, with blocks specified a priori. An extension of the model allows for tendencies toward reciprocation of ties beyond those explained by the partition. The extended model provides a one degree-of-freedom test of the model. A numerical example from the social network literature is used to illustrate the methods.     

The role of perception in the intention to change the family financial situation

The study investigates factors associated with the individual intentions to change the family financial situation of 337 farm respondents. The hypotheses are that intentions to change are influenced by (a) resource flexibility or constraints existing at the time of the decision situation, including off-farm employment, education, age, and household size, and (b) perceptual factors of perceived income adequacy, locus of control, degree of discrepancy between standard and level of the family financial situation, and dissatisfaction or satisfaction with the discrepancy. Older respondents and those experiencing more external control are less likely to intend to change. Younger respondents and those who perceive their incomes as more adequate are more likely to perceive that they have control over their situation. The lower the perceived income adequacy, the greater the discrepancy between standard and level of the family financial situation and the lower the satisfaction with the discrepancy. Significant indirect effects were consistent with theoretical expectations.Research was supported by the Minnesota Agricultural Experiment Station Projects 52-055, 52-054, and 52-058 and the Minnesota Extension Service. The authors wish to thank Jean W. Bauer, Ph.D., for research collaboration and Susan Keskinen and Cathy Schultz for research assistance.Her research interests include social, economic, and technical decision processes, discrepancies between standards and levels, and the interrelationship of work and family roles, particularly for farm women. Her Ph.D. is from Iowa State University.Her research interests in family resource management theory include social decision making processes and social decision rules, family life quality, and the economic consequences of divorce. Her Ph.D. is from Michigan State University.     

Two different worlds: The academic orientation of graduate education vs. the realities of one applied career

The current academic orientation of graduate education in sociology poses a number of barriers in preparing students for applied careers. As a case in point, a former housing analyst discusses problems with the emphases of graduate training versus the realities of a career in applied housing research. Issues discussed include the importance of an in-depth knowledge of the applied area, the need for broad sociological scope as opposed to substantive and theoretical specialization and statistical/methodological skills. To more closely mesh educational experience with the demands of the applied workplace, graduate programs might offer a variety of options within a broadly defined applied track, expand opportunities for students to gain applied experience and recruit faculty members from an applied background. specializing in social organization and demography. She currently is working on a dissertation that examines the implications of computer technology for workplace democracy.     

Application of life table techniques to measurement of contraceptive effectiveness

Two problems are associated with the analysis of use-effectiveness of contraception. First, couples belonging to a sample of contraceptors typically vary in their monthly chances of contraceptive failure. Second, one does not observe for many, and perhaps a majority of the couples, how long they can remain protected with the contraceptive, because either they are stopping contraception to plan a pregnancy or else observation of them is being interrrupted by lost contact, by discontinuation of contraception for other reasons, or by the end of the study. It is argued that because of these two problems-namely, sample heterogeneity and incomplete histories-the Pearl pregnancy rate, which has been traditionally used to measure contraceptive effectiveness, is inadequate.A life table method is described that permits one to combine incomplete histories with complete ones for purposes of estimating the proportions of the sample that might have remained protected for specified periods if all members had remained under observation for these periods. The versatility of the techniques is illustrated in relation toa retrospective survey. A detailed account of procedure is given. Finally, it is shown that only under specialized conditions that are rarely met in practice is it possible to estimate the results of the new technique from knowledge of Pearl pregnancy rates alone.     

The potential for successful family foster care: conceptualizing competency domains for foster parents

The potential to foster successfully starts with developing and supporting competency in 12 domains: providing a safe and secure environment, providing a nurturing environment, promoting educational attainment and success, meeting physical and mental healthcare needs, promoting social and emotional development, supporting diversity and children's cultural needs, supporting permanency planning, managing ambiguity and loss for the foster child and family, growing as a foster parent, managing the demands of fostering on personal and familial well-being, supporting relationships between children and their families, and working as a team member. This article describes each domain and reviews relevant research to help guide the assessment of practicing and future foster parents.     

Stimulant medication use, misuse, and abuse in an undergraduate and graduate student sample

In this study, the authors investigated the characteristics of use, misuse, and abuse of stimulant medication (primarily methylphenidate and variants) among students at a northeastern US university. Researchers sent an invitation to take an Internet survey to student e-mail addresses and passed 150 paper surveys in undergraduate classes, analyzing 1,025 (975 electronically) returned surveys. Sixteen percent of respondents reported abusing or misusing stimulant medication. Ninety-six percent of respondents who specified a medication preferred to abuse or misuse Ritalin. Men and women reported similar use patterns. Most respondents who abused or misused stimulant medication swallowed pills; 40% used intranasally. Reasons for abusing or misusing stimulant medication included improving attention, partying, reducing hyperactivity, and improving grades. Consistent with previous studies, results suggest that abuse of stimulant medication is a concern on college campuses. The results point to various reasons for and methods of abusing and misusing stimulant medication that may direct future research, prevention, and intervention.     

Frequency of Selecting Noise Variables in Subset Regression Analysis: A Simulation Study

This article presents the results of a simulation study of variable selection in a multiple regression context that evaluates the frequency of selecting noise variables and the bias of the adjusted R ² of the selected variables when some of the candidate variables are authentic. It is demonstrated that for most samples a large percentage of the selected variables is noise, particularly when the number of candidate variables is large relative to the number of observations. The adjusted R ² of the selected variables is highly inflated.     

Are dual and single exposures differently associated with clinical levels of trauma symptoms? Examining physical abuse and witnessing intimate partner violence among young children

A significant portion of children living in the United States have experienced trauma. Informed by the developmental traumatology model, we explored the effects of physical abuse and witnessing intimate partner violence (IPV) on childhood trauma symptoms. This study utilizes a convenience sample of 580 high‐risk children between 3 and 12 years who received services from one‐child advocacy centre during a 12‐month period. We performed a series of binary logistic regression analyses to examine if physical abuse, exposure to IPV, and dual exposure (i.e., both physical abuse and IPV) are distinctly associated with six trauma symptoms, including anxiety, depression, posttraumatic stress (PTS), dissociation, anger, and sexual concerns. The results indicated that dual exposure was predictive of all trauma symptoms, except for dissociation. Additionally, physical abuse was associated with PTS, anger, and sexual concerns, whereas exposure to IPV was associated with depression, PTS, and sexual concerns. Research and implications for practitioners working with young children are discussed.     

A Meta‐Analysis of Friendship Qualities and Romantic Relationship Outcomes in Adolescence

Romantic relationships are one of the most significant interpersonal ties in adolescence, thus understanding factors that may contribute to their formation and quality are important. The current meta‐analysis focuses on links between friendship quality and romantic relationship outcomes for adolescents up to 18 years. In a series of meta‐analyses (k = 28 studies, N's = 946–4,040), friendship qualities were not related to romantic involvement. However, we did find robust evidence of continuity between friendship qualities and romantic relationship qualities. Additionally, adolescents experienced more negative quality in their romantic relationships than in their friendships. These findings suggest that friendships have implications for adolescents’ romantic relationships, although more research is needed on specific quality associations, and the mediators of these relations.     

From Zero to Hero? An analysis of the human rights protections within the Global Compact for Safe,Orderly and Regular Migration (GCM)

This article examines the Global Compact for Safe, Orderly and Regular Migration (GCM) from three perspectives: First, while the GCM is not legally binding, the human rights obligations of states which underpin the GCM are. The application of international human rights law to everyone, including migrants, has led to frictions in the inter‐governmental negotiation process, with some states declining to sign the GCM. States cannot relieve themselves of the human rights obligations to which they are already, voluntarily, bound by refusing to sign the GCM. Second, the GCM asserts the human rights of migrants, and by implication condemns state practices contrary thereto, but it also yields to political sensitivities. Thus, we encounter a Compact that defends existing human rights standards, but concurrently submits to political will and tolerates conditions of vulnerability. Third, the GCM’s implementation depends upon, as yet undefined, partnerships with non‐State actors and monitoring against human rights standards.