Doctor of Philosophy / Department of Statistics / Gary Gadbury / In biomedical studies, the treatment main effect is often expressed in terms of an “average difference.” A treatment that appears superior based on the average effect may not be superior for all subjects in a population if there is substantial “subject-treatment interaction.” A parameter quantifying subject-treatment interaction is inestimable in two sample completely randomized designs. Crossover designs have been suggested as a way to estimate the variability in individual treatment effects since an “individual treatment effect” can be measured. However, variability in these observed individual effects may include variability due to the treatment plus inherent variability of a response over time. We use the “Neyman - Rubin Model of Causal Inference” (Neyman, 1923; Rubin, 1974) for analyses. This dissertation consists of two parts: The quantitative and qualitative response analyses. The quantitative part focuses on disentangling the variability due to treatment effects from variability due to time effects using suitable crossover designs. Next, we propose a variable that defines the variance of a true individual treatment effect in a two crossover designs and show that they are not directly estimable but the mean effect is estimable. Furthermore, we show the variance of individual treatment effects is biased under both designs. The bias depends on time effects. Under certain design considerations, linear combinations of time effects can be estimated, making it possible to separate the variability due to time from that due to treatment. The qualitative section involves a binary response and is centered on estimating the average treatment effect and bounding a probability of a negative effect, a parameter which relates to the individual treatment effect variability. Using a stated joint probability distribution of potential outcomes, we express the probability of the observed outcomes under a two treatment, two periods crossover design. Maximum likelihood estimates of these probabilities are found using an iterative numerical method. From these, we propose bounds for an inestimable probability of negative effect. Tighter bounds are obtained with information from subjects that receive the same treatments over the two periods. Finally, we simulate an example of observed count data to illustrate estimation of the bounds.

The suicide rate in Hong Kong has been increasing since 1997, and the suicide rate among the 30-49-year-olds has increased from 294 in 1996, to 484 in 2003, surging about 65% since 1996. Despite the fact that an increasing trend had been observed, the characteristics of suicides among this age group were not known because no empirical research had been conducted among this age group in Hong Kong. The present study is the first psychological autopsy study conducted on the 30-49 age group in a Chinese society. The aims of this study were to identify and examine the magnitude of the risk factors of middle-aged suicide among the Hong Kong citizens, to determine the similarities and applicability of Western findings into local situation, and to recommend culturally specific evidence-based preventive and intervention strategies. These findings suggest that there are more commonalities than differences in risk factors for suicide found in other psychological autopsy studies; however, the magnitude of some of these identified risk factors were inconsistent with suicide research conducted in other countries. Given the multi-faceted and distinctive nature of middle-age suicide in Hong Kong, a public health approach of suicide prevention strategy, which targets both individuals and the population, is considered to be appropriate than the clinical approach in order to reduce larger population developing greater suicidal risk.

Master of Science / Department of Family Studies and Human Services / Mark B. White / Although the processes by which fathers’ presence in the home affect children’s development is not known exactly, ongoing research is making strides toward a greater understanding of this concept (Lamb, 2000). Much of the research conducted on fathering came from researchers’ applying measures and concepts developed to understand mothering. This comparison of fathering and mothering has yielded little understanding of the processes by which father involvement can influence child development and, only in recent decades, has fathering begun to be studied using separate measures designed specifically to understand the unique aspects of fathering (Marsiglio, Amato, Day, & Lamb, 2001). To date, the effects of father involvement in families have been highlighted as a key factor in child growth and development, prevention of poverty, and as a buffer against adolescent risk-taking behaviors (Day & Lamb, 2004). However, in some cases, father involvement can have a very negative effect on children in families, and counter examples of research, showing the deleterious effects of negative father involvement, add an important aspect to fathering studies (Pleck, 2003). Unfortunately, the contradictory opinions and information found in research literature offer practitioners limited information upon which to base their work with fathers and their families. The following is a review of current research literature on father involvement, with an emphasis on families with adolescents. Recent improvements in researchers’ understanding and measurement of father involvement offer practical information for mental health practitioners. The written portion of this report will review current research on father involvement with adolescent children, and then in the presentation, offer suggestions for applying current fathering research to counseling practice. The goal of this report is to offer information that will narrow the research to practice gap for those working with adolescents and their families. Despite the flurry of research on father involvement in recent decades, little appears to have been done to make this research readily available to practitioners. Thus, current practices are limited, in that they are not benefiting from past research on father involvement and are not evolving with improved conceptualization and measurement of fathering activities. Given the current emphasis on evidence-based practice, this report is meant to be an added resource for practitioners, intending to help fathers in families with adolescents. In addition to a critical review of key works focusing on the effects of father involvement on adolescent children, this report will add insight to the work that clinicians do by discussing current perspectives in the fathering literature and offering suggestions for applying these ideas in the talk-therapy arena. Father influence on children during adolescence is the focus of this report due to research evidence showing that fathers influence may become increasingly important in the later stages of child development. (Amato, 1994; Faber, Edwards, Bauer, & Wetchler, 2003).

Doctor of Philosophy / Department of Family Studies and Human Services / John E. Grable / Anthony Jurich / This study was designed to investigate the link between marital quality and financial management roles by gaining insight into the relationship processes of farm couples. Fifty-five married individuals who identified living in a rural or farm location comprised the sample. Each participant completed a paper-pencil survey that included assessment of demographic variables, financial management role involvement, satisfaction with financial management roles, financial satisfaction, and marital satisfaction. Results indicated that respondents of this study were more likely than their spouses to hold primary responsibility for financial management roles and were moderately satisfied with their role involvement. This finding indicated that couples may specialize in taking on the financial management roles they play, rather than working together jointly. Secondly, a new scale emerged, based on Gottman's Sound Relationship House Scales, and was entitled "Shared Goals & Values," utilizing a factor analysis. This scale assessed the meaning of money, financial goals, views about autonomy, and hopes and aspirations within the couple relationship. The Shared Goals & Values scale was found to be a factor influencing both marital satisfaction and financial satisfaction. This finding indicated that the way a couple views money does have impact on marital satisfaction and financial satisfaction. Finally, evidence was found that having shared views about roles within the relationship was more of a predicting factor for financial satisfaction than how a couple communicated during conflict. In regards to a couple's perceived financial satisfaction, having similar perceptions about relationship roles, shared views about money, financial management role satisfaction and increased household income were the important predicting factors. Sharing similar views about money and support for goals in one's life, and household income were significant in predicting increased marital satisfaction.

Master of Science / Department of Family Studies and Human Services / Anthony Jurich / Play is essential to child development because it contributes to the cognitive, physical, social, and emotional well-being of children and youth. The integration of play and play therapy techniques with child and family therapy offers a creative, age appropriate way to provide mental health treatment. This report offers an overview of play therapy, the therapeutic value of play, the historical background, theory, techniques, materials, and settings. Further, it provides the reader with many therapeutic modalities in which to implement play in family therapy. Because play therapy is a specialized field, this report also provides the reader with information on how to use this to create a marketing niche. This report was written with the Masters’ or Doctoral student in mind, as well as practicing therapists; with hopes to provide them a creative avenue in which to enhance their current therapeutic modalities.

Master of Science / Department of Family Studies and Human Services / Joyce Baptist / Although American expatriation is becoming increasingly more prevalent, research has yet to keep up. The purpose of this report is to explore expatriation transition models, common mental health needs, challenges that accompany international living, clinical implications of such complexities, and the need for mental health services for American expatriates. A case study will be employed to illustrate such challenges. Social learning, symbolic interaction, and systems theories will be used to conceptualize these difficulties. With the large movement of Americans overseas, there is an increase need for mental health therapists available to them. This report acknowledges that an increase of expatriate research will lead to resources that will help therapists more effectively and more efficiently treat expatriate mental health issues.

Master of Science / Department of Family Studies and Human Services / Joyce Baptist / This report describes the role of cultural socialization in the ethnic identity formation of internationally adopted children. This report explores the process of integrating the child’s birth culture and the complexities that are involved in raising internationally adopted children. The theoretical frameworks of identity development and social construction will be used to provide a conceptual understanding of the process of ethnic identity development. This report will describe the use of Narrative Therapy and Child-centered Play Therapy to facilitate the process of identity development. Implications for clinical practice will be discussed.