Assessing robustness of crossover designsto subjects dropping out

In some crossover experiments, particularly in medical applications, subjects may fail to complete their sequences of treatments for reasons unconnected with the treatments received. A method is described of assessing the robustness of a planned crossover design, with more than two periods, to subjects leaving the study prematurely. The method involves computing measures of efficiency for every possible design that can result, and is therefore very computationally intensive. Summaries of these measures are used to choose between competing designs. The computational problem is reduced to a manageable size by a software implementation of Polya theory. The method is applied to comparing designs for crossover studies involving four treatments and four periods. Designs are identified that are more robust to subjects dropping out in the final period than those currently favoured in medical and clinical trials.     

SOCIAL ATOMISM, HOLISM, AND TRUST

The metatheoretical difference between social atomism and social holism is clarified by analysis of the generic necessity of trust. A theoretical approach to trust can be traced from Durkheim, Simmel, Parsons, and the recent work of Luhmann and Barber. Trust functions as a deep assumption underwriting social order and is not reducible to individual characteristics. Changes in trust alter social relationships. The study of power, exchange, family, and politics illustrates how trust constitutes social reality as emergent and holistic. This helps us understand the formation of interpersonal relationships, the difference between economic and social exchange, and the discrepancy between attitudes toward society and toward particular institutional actors.     

Does the Organization of Emotional Expression Change Over Time? Facial Expressivity From 4 to 12 Months

Differentiation models contend that the organization of facial expressivity increases during infancy. Accordingly, infants are believed to exhibit increasingly specific facial expressions in response to stimuli as a function of development. This study tested this hypothesis in a sample of 151 infants (83 boys and 68 girls) observed in 4 situations (tickle, sour taste, arm restraint, and masked stranger) at 4 and 12 months of age. Three of the 4 situations showed evidence of increasing specificity over time. In response to tickle, the number of infants exhibiting joy expressions increased and the number exhibiting interest, surprise, and surprise blends decreased from 4 to 12 months. In tasting a sour substance, more infants exhibited disgust and fewer exhibited joy and interest expressions, and fear and surprise blends over time. For arm restraint, more infants exhibited anger expressions and anger blends and fewer exhibited interest and surprise expressions and surprise blends over time. In response to a masked stranger, however, no evidence of increased specificity was found. Overall, these findings suggest that infants increasingly exhibit particular expressions in response to specific stimuli during the 1st year of life. These data provide partial support for the hypothesis that facial expressivity becomes increasingly organized over time.     

OBLIGATED CLINICAN SELF-DISCLOSURE: JONE THERAPITS'S INTERVENTIONS FOLLOWING A FAMILY MEMBERS'S PUBLICIZED MURDER*

This article describes a family therapist's management of the sudden collision between profesional and personal boundaries following the publicized murder of her spouse. Reasons are offered to explain why it is becoming difficult for all clinicians to control the process of self-disclosure in therapy. Strategies used to meet the demands of affirming professional distance while maintaining therapeutic effectiveness are described. Brief recommendations are proposed for therapists in group, medical, rural, inpatient, and underserved settings. It is hoped that this case study will generate further discussion and assist health care providers who may face this challenge in the future.     

“I Did Not Get that Job Because of a Black Man...”: The Story Lines and Testimonies of Color-Blind Racism

In this paper we discuss the dominant racial stories that accompany color-blind racism, the dominant post–civil rights racial ideology, and asses their ideological role. Using interview data from the 1997 Survey of College Students Social Attitudes and the 1998 Detroit Area Study, we document the prevalence of four story lines and two types of testimonies among whites. We also provide data on ideological dissidence among some whites (we label them racial progressives) and blacks. We show that although these stories, and the racial ideology they reinforce, have become dominant, neither goes uncontested.     

Maternal Functioning, Time, and Money: The World of Work and Welfare

Numerous studies have assessed families' employment and financial stability following welfare reform. Yet little research has addressed whether welfare and work transitions are linked with other changes in family functioning. Using a representative sample of approximately 2,000 low-income urban families from the Three-City Study, analyses assessed whether mothers' welfare and employment experiences over a two-year period following welfare reform were related to changes in family well-being. Lagged regression models controlling for family characteristics and earlier levels of functioning found that moving into employment and stable employment (of 30 hours or more per week) were linked to substantial increases in income and improvements in mothers' psychological well-being. Movements into employment also were associated with declines in financial strain and food insecurity. Sustained or initiated welfare receipt was related to relative declines in income, physical health, and psychological well-being, but also to improved access to medical care. In contrast, mothers' welfare and work experiences showed very limited relations to changes in the quality of parenting or of children's home environments. These patterns were similar for families with young children and those with adolescent children. Results suggest that parenting behaviors are more resistant to change than are maternal emotional and economic functioning.     

Maternal Welfare and Employment Experiences and Adolescent Well-Being: Do Mothers' Human Capital Characteristics Matter?

Using a representative sample of over 900 low-income urban families from the Three-City Study, analyses assessed whether maternal human capital characteristics moderate relationships between mothers' welfare and employment experiences and young adolescents' well-being. Results indicate synergistic effects whereby greater maternal education and literacy skills enhanced positive links between mothers' new or sustained employment and improvements in adolescent cognitive and psychosocial functioning. Greater human capital also enhanced the negative links between loss of maternal employment and adolescent functioning. Mothers' entrances onto welfare appeared protective for adolescents of mothers with little education but predicted decreased psychosocial functioning among teens of more educated mothers. Results suggest that maternal human capital characteristics may alter the payback of welfare and work experiences for low-income families.