Emerging adulthood (ages 18-25 years) is a developmental period marked by changes in attachment, the onset of serious dating relationships, and rates of intimate partner violence (IPV) up to 40% and 90% for physical and psychological IPV, respectively. This dissertation aims to investigate moderators of the link between insecure attachment, a known risk factor for IPV, and psychological IPV, coercive controlling behaviours, and relational aggression in emerging adulthood. One hundred and seventeen undergraduate students in dating relationships were recruited to partake in a baseline assessment followed by a 14-day daily diary study. During the baseline assessment, participants self-reported on putative trait level risk factors such as demographics and insecure attachment. During the daily diary portion, participants reported on their use of partner aggression (physical and psychological IPV, coercive controlling behaviours, and relational aggression; however, due to low base rates, physical IPV could not be analyzed as an outcome), as well as their experiences of felt partner acceptance and rejection, support and conflict in their relationships, alcohol use, and stress for each day. I hypothesized that attachment anxiety, problems in the dyadic relationship (inadequate support, conflict, and felt rejection and anxiety about acceptance), and putative disinhibitors (stress and alcohol consumption) would be directly linked to risk for perpetration of all forms of aggression and interact to predict risk for partner aggression. Hypotheses regarding partner support, conflict, and felt regard were also tested. Specifically, I hypothesized that ratings of partner support fit, hurt as a result of conflict, and daily felt regard would differ for more insecurely attached versus more securely attached individuals. Following application of exclusion criteria, data from 98 participants were analyzed using multilevel modeling in Hierarchical Linear Modeling (Raudenbush et al., 1995). The results from this dissertation underscore the importance of attachment anxiety as an individual risk factor for IPV and identified more proximal risk factors that fluctuate on a daily basis. Attachment anxiety, felt rejection, and conflict were related to risk for all three forms of IPV. Unexpectedly, attachment avoidance was linked to decreased risk for coercive control. Anxiety about acceptance was uniquely associated with risk for psychological IPV, and inadequate support fit was uniquely associated with risk for coercive control. Greater attachment anxiety interacted with high conflict to predict greater risk for coercive control. No other significant two-way interactions between attachment anxiety and problems in the dyadic relationship emerged. Contrary to hypotheses, stress and alcohol consumption were linked to decreased risk for coercive control. Stress also appeared to suppress the link between dyadic problems and risk for psychological IPV on a given day, and dyadic problems paired with alcohol consumption was related to a decreased risk of coercive control. High stress and greater dyadic problems interacted to predict greater risk for coercive control as expected. No conclusions could be drawn about 2-way interactions between stress and dyadic problems and alcohol consumption and dyadic problems when predicting relational aggression, as the model did not converge. This study did not find support for the “perfect storm theory” of aggression (in which a 3-way interaction between risk factors is associated with greatest risk of IPV) when predicting psychological IPV. The “perfect storm theory” could not be tested in relation to coercive control and relational aggression as these models did not converge. The findings from this study contribute to our knowledge of why some people perpetrate IPV and not others, and why people perpetrate IPV on some days and not others. These results inform the multiple possible points of entry for prevention and interventions aiming to promote healthy relationships in emerging adults. / Graduate

This photographic documentary seeks to record the transition from teenager into adulthood of twelve girls living in Melbourne, Australia between 2002 and 2008. Throughout the process of the project the artist has sought to challenge the assumption that reaching adulthood can be defined by achieving certain milestones in society, and that the transition period is as much about personal self-realisation on the part of the individual, as it is about measurements set by society. The photographic work is accompanied by text in the form of quotes taken from audio interviews conducted throughout the documentation process. This paper compares the ideas set by society about the process of becoming an adult and the real life events that triggered this transition period in this particular group of girls.

Abstract not available

Objective: The current study examined conceptions of adulthood, close personal relationships, and health behaviors (dietary intake, substance use, sexual behaviors) of emerging adults aged 18-30 with horizontally-infected HIV. Emerging adults were expected to differ in levels of achievement of adulthood tasks. The quality of close relationships, and perceptions of close friends’ behaviors were hypothesized to be associated with health behaviors. Method: Utilizing a cross-sectional design, 48 emerging adults with HIV (64.6% female; M age = 22.59, SD = 3.17) from a youth-based clinic serving most of Miami-Dade County were recruited. Participants completed measures on markers of adulthood, close friend and romantic partner qualities, health behaviors, and perceptions of close peers’ health behaviors using Filemaker technology on laptops; audio computer-assisted self-interview options were available. Results: The domains of individualism and family capacities received the highest mean ratings of importance for marking adulthood. Participants rated the acceptance of responsibility for one’s actions and making independent choices as being most important for being considered an adult; other items rated highly were related to emotional control and adopting new family roles. In the domain of peer relationships, participants who had a close friend or romantic partner generally reported high levels of positive qualities in the friendship that were comparable to national samples; however, most individuals had not disclosed their HIV status to their best friend or romantic partner. A number of emerging adults (12.5%) reported having no friends, which is a higher percentage of friendless individuals than national samples. Most emerging adults with HIV reported consumption of fewer fruits and vegetables than national recommendations. In addition, comparable to rates found among adolescents and emerging adults without HIV, participants were engaged in substance use and risky sexual practices such as having multiple sexual partners. Conclusions: There was considerable variability in development among emerging adults. Conceptions of adulthood and peer relationships may be a particularly important aspect of development to examine among emerging adults with HIV. In addition, many of these individuals continue to engage in health risk behaviors that may require intervention efforts geared specifically to their developmental stage. Implications for care providers are discussed.

Larger and stronger muscles are positively associated with bone strength in the growing skeleton; however, less is known about the role of muscle properties on bone strength later in life. The primary objective of this study was to examine the relationship between muscle cross sectional area (MCSA), muscle force and rate of torque development (RTD) with bone strength indices (bone strength index (BSI) and strength strain index (SSI)) in the radius of healthy middle-aged adults. All bone and muscle measurements were determined in the non-dominant forearm in a sample of 40 healthy adults (23 men, 17 women: mean age 49.5, SD 2.3 yrs). Peripheral quantitative computer tomography (pQCT) was used to scan the distal and shaft sites of the radius bone in the forearm. MCSA was determined from the forearm shaft scan. Forearm muscle force was measured by hand grip dynamometry and RTD was obtained from isometric wrist flexion from an isokinetic dynamometry protocol. Hierarchical regression analyses were used to identify whether muscle properties (MCSA, grip force, and RTD) independently predicted radius bone strength indices (BSI and SSI), after adjusting for the confounders of sex, height and weight. Steps of the regression models that included sex, height, weight and a muscle property explained between 66% and 71% of variance in distal radius BSI and between 74% and 78% variance of estimated bone strength (SSI) at the shaft site (all steps p<0.001). MCSA explained a significant amount of variance in BSI (R2=0.08; p<0.01) and SSI (R2=0.04; p<0.05) at the radius. Grip force was also a significant predictor of SSI (R2=0.05; p<0.01) but not distal radius BSI (R2=0.03; p=0.07). Conversely, RTD explained a significant amount of variance in bone strength at the distal radius (R2=0.04; p<0.05), but not at the shaft (R2=0.01; p=0.17). These cross sectional findings support the theory that regional muscle size, force, and rate of torque development are related to estimated bone strength in the forearm at midlife. Further research should focus on targeted interventions to help determine which muscle property elicits a greater osteogenic response to optimize bone strength at distal and shaft sites of the radius.

Prior research has indicated that family experiences, including parental divorce, interparental conflict, and the parent-child relationship, play an important role in adult childrens romantic relationships (e.g., Wallerstein & Lewis, 1998; Mahl, 2001; Harvey & Fine, 2004). Research on how these variables may work in combination and on how these family experiences affect romantic relationships during the developmental period of emerging adulthood is lacking. The current study investigated the impact that family divorce has on features of emerging adults romantic relationships. It also examined whether these relationships are mediated by parent-child relationship, are moderated by interparental conflict, and vary with gender and age at the time of divorce.<p>A total of 310 students between the ages of 18-25 from University of Saskatchewan participated in this study. Contrary to the hypothesis, the findings showed that in their romantic relationships emerging adults from divorced families, compared to emerging adults from intact families, had a higher degree of three romantic features: care, commitment, and maintenance. Partly in line with the hypothesis, only retrospective interparental conflict moderated the link between family structure and romantic conflict. Finally, differences, regardless of family structure, were found between males and females, where females indicated having higher levels of intimacy and males indicated having higher levels of coercion in their romantic relationships. Possible explanations for the findings and implications for future research are discussed.

Prior research has indicated that family experiences, including parental divorce, interparental conflict, and the parent-child relationship, play an important role in adult childrens romantic relationships (e.g., Wallerstein & Lewis, 1998; Mahl, 2001; Harvey & Fine, 2004). Research on how these variables may work in combination and on how these family experiences affect romantic relationships during the developmental period of emerging adulthood is lacking. The current study investigated the impact that family divorce has on features of emerging adults romantic relationships. It also examined whether these relationships are mediated by parent-child relationship, are moderated by interparental conflict, and vary with gender and age at the time of divorce.<p>A total of 310 students between the ages of 18-25 from University of Saskatchewan participated in this study. Contrary to the hypothesis, the findings showed that in their romantic relationships emerging adults from divorced families, compared to emerging adults from intact families, had a higher degree of three romantic features: care, commitment, and maintenance. Partly in line with the hypothesis, only retrospective interparental conflict moderated the link between family structure and romantic conflict. Finally, differences, regardless of family structure, were found between males and females, where females indicated having higher levels of intimacy and males indicated having higher levels of coercion in their romantic relationships. Possible explanations for the findings and implications for future research are discussed.

Larger and stronger muscles are positively associated with bone strength in the growing skeleton; however, less is known about the role of muscle properties on bone strength later in life. The primary objective of this study was to examine the relationship between muscle cross sectional area (MCSA), muscle force and rate of torque development (RTD) with bone strength indices (bone strength index (BSI) and strength strain index (SSI)) in the radius of healthy middle-aged adults. All bone and muscle measurements were determined in the non-dominant forearm in a sample of 40 healthy adults (23 men, 17 women: mean age 49.5, SD 2.3 yrs). Peripheral quantitative computer tomography (pQCT) was used to scan the distal and shaft sites of the radius bone in the forearm. MCSA was determined from the forearm shaft scan. Forearm muscle force was measured by hand grip dynamometry and RTD was obtained from isometric wrist flexion from an isokinetic dynamometry protocol. Hierarchical regression analyses were used to identify whether muscle properties (MCSA, grip force, and RTD) independently predicted radius bone strength indices (BSI and SSI), after adjusting for the confounders of sex, height and weight. Steps of the regression models that included sex, height, weight and a muscle property explained between 66% and 71% of variance in distal radius BSI and between 74% and 78% variance of estimated bone strength (SSI) at the shaft site (all steps p<0.001). MCSA explained a significant amount of variance in BSI (R2=0.08; p<0.01) and SSI (R2=0.04; p<0.05) at the radius. Grip force was also a significant predictor of SSI (R2=0.05; p<0.01) but not distal radius BSI (R2=0.03; p=0.07). Conversely, RTD explained a significant amount of variance in bone strength at the distal radius (R2=0.04; p<0.05), but not at the shaft (R2=0.01; p=0.17). These cross sectional findings support the theory that regional muscle size, force, and rate of torque development are related to estimated bone strength in the forearm at midlife. Further research should focus on targeted interventions to help determine which muscle property elicits a greater osteogenic response to optimize bone strength at distal and shaft sites of the radius.

The aim of the study was to investigate the relationship between the glass cliff phenomenon and two forms of sexism: hostile sexism (HS) and benevolent sexism (BS). Glass cliff refers to the tendency to endorse a woman candidate for a normally desirable, high-status position at the time of downfall or when things are not going well. A questionnaire package was first administered to a working people sample (N = 328) with diverse occupational backgrounds. Based on the analyses and findings, to be able to eliminate the potential confounding effect of the order of the scales in the package, the study was repeated on a student sample (N = 147). Finally, analyses were repeated after the data from both samples were combined. Results showed no evidence for 1) the presence of glass cliff and 2) the presence of a relationship between glass cliff and two forms of sexism. The results from both samples were discussed, presenting some plausible explanations for the findings. Limitations of the study and suggestions for future research are also presented.

Thesis (Ph. D.)--University of Chicago, Committee on Human Development, 2001. / Includes bibliographical references. Also available on the Internet.