In 2008, there were more than 5,200 workplace fatalities in the United States (BLS, 2010b). During the same time period, U.S. employees missed almost 1.1 million days from work (BLS, 2010c). Accidents are unexpected outcomes that result not only from individuals' behaviors, but from contextual factors (Krause, 1997; Reason, 1990). Therefore, unsafe behaviors have to be interpreted according to a combination of what is occurring in the environment and what the individual is doing in that environment. The present study sought to create a more comprehensive model of safety by means of macroergonomics. Macroergonomics utilizes sociotechnical systems theory to posit that a work system is composed of a personnel subsystem (i.e., ways individuals perform tasks), a technological subsystem (i.e., tasks to be performed), and external factors (Hendrick, 2002a). Perceived control over work hours, an aspect of the technological subsystem, was examined as an antecedent of work-family conflict. Supervisor instrumental support, an aspect of the personnel subsystem, was examined as a moderator of the relationships between perceived control over work hours and work-family conflict. Supervisors have an imperative role in employees' perception of control over their work hours (Kelly & Moen, 2007). Supervisor instrumental support was also hypothesized to moderate the relationships between work-family conflict and safety performance. Supervisors who support their employees in their work-family matters exceed mandatory requirements set forth to protect workers' safety and health (Mearns, Hope, Ford, & Tetrick, 2010). A majority of the 360 participants in the present study were grocery store employees who worked in the front end of the store as cashiers. Job tenure in this particular grocery store chain was an average of 7 years (SD = 5.96) and the average number of hours worked per week was 31 (SD = 8.55). The employees were an average age of 38 years old (SD = 15.25). Two hundred and sixty-two (73%) of the participants were female, 330 (92%) were White, 196 (55%) employees were married or living as married, 146 (41%) employees identified themselves as parents with children living at home, and 58 (16%) employees provided elder care. The data were analyzed using a moderated mediation model. An employee's perceived control over his/her work hours was negatively associated with work-to-family and family-to-work conflict. Work-to-family conflict was not significantly associated with either safety compliance or participation. In contrast, family-to-work conflict was significantly associated with both safety compliance and participation. These findings replicate Cullen and Hammer's (2007) findings that family-to-work conflict, but not work-to-family conflict, is negatively associated with safety compliance and participation. The replication of these significant findings gives support to macroergonomics' assertion that external forces (i.e., family) can affect the safety of employees. All of the meditating and moderating relationships proposed in this dissertation were not significant. I conducted post hoc analyses to determine other possible significant paths in the model examined. The FSSB dimension of supervisor instrumental support was found to positively affect both safety compliance and participation. Supervisor instrumental support was also found to directly affect work-to-family conflict. Overall FSSB and its subdimensions demonstrated similar patterns in the hypothesized relationships and in additional relationships examined. Numerous implications can be recognized from this dissertation. First, interdisciplinary approaches to safety research are emerging and important in the pursuit of safer work environments. Macroergonomics and I/O psychology have commonalities that lend themselves to a good partnership where researchers can learn from each other and collaborate to advance the study of safety. Second, organizations need to focus on the stressors their employees experience as part of their safety programs, and numerous studies, including this dissertation, have found that family-to-work conflict impacts safety compliance and participation. Future safety research may incorporate macroergonomics, which emphasizes that focusing on one adverse aspect of the system may not be enough to create valuable change if there are other adverse factors still creating demands elsewhere in the system. This will allow for a more comprehensive model that ensures certain aspects of the system are not neglected, which can reduce effectiveness of constructs used to create positive changes.

Congested traffic corridors in dense urban areas are key contributors to the degradation of urban air quality. While waiting at bus stops, transit patrons may be exposed to greater amounts of vehicle-based pollution, including particulate matter, due to their proximity to the roadway. Current guidelines for the location and design of bus stops do not take into account air quality or exposure considerations. This thesis provides a unique contribution to roadside air quality studies and presents an innovative method for the consideration of bus shelter placement. Exposure to roadside pollutants is estimated for transit riders waiting at three-sided bus stop shelters that either: 1) face roadway traffic, or 2) face away from roadway traffic. Shelters were instrumented with particulate matter monitoring equipment, sonic anemometers for wind speed and direction, and vehicle counters capable of categorizing vehicles by length. Temperature and relative humidity were gathered from a nearby monitoring station. Data were collected for two different days at three shelters during both the morning and afternoon peak periods for a total of eleven data periods. Bus shelter orientation is found to significantly affect concentration of four sizes of particulate matter: ultrafine particles, PM1, PM2.5, and PM10. Shelters with an opening oriented towards the roadway were observed to have significantly higher concentrations inside the shelter than outside the shelter. In contrast, shelters oriented away from the roadway were observed to have significantly lower concentrations inside the shelter than outside the shelter. The differences in average particulate matter concentrations are statistically significant across all four sizes of particulate matter studied. Additional correlation and linear regression investigation reveals interactions between particulate concentrations and built environment characteristics, vehicle flow, and weather conditions. Temperature and relative humidity played a large role in the diurnal variation of average concentration levels. In all instances, particulate concentrations were greater during the morning period, often substantially so. Particulate concentrations are shown to vary based on both wind speed and direction. Vehicle flow is correlated with particulate levels, though significance is not consistent. Lagged vehicle flow is demonstrated to be more consistently significant. Regression analysis suggests weather factors such as wind, temperature, and relative humidity explain roughly 70% of particulate variation, while vehicle flow explains less than 6%.

As a social species, human beings are driven by an innate desire to belong and are thus motivated to develop and maintain meaningful social relationships. As such, perceiving a lack of belongingness strongly impacts psychological and physiological health and well-being. A common form of perceived relationship deficits is loneliness, a negative-affective experience detrimental to health and well-being over time. Through a series of three manuscripts, this dissertation applies the full-cycle model of social psychological research to explore various affective, behavioral, and cognitive consequences of loneliness. Whereas existing models of loneliness focus on long-lasting or chronic forms of loneliness, these studies investigate chronic and transient loneliness, as well as processes through which transient loneliness may develop into more chronic levels. The first paper demonstrates that solitary consumption is a unique behavioral response to transient loneliness, which may exacerbate the experience of loneliness and negatively impact health over time. The second paper provides support for a positivity-deficit perspective, demonstrating that chronic loneliness is related to less disclosure of recent positive experiences, a deficit which may be consequential for the development of close relationships. The third paper demonstrates the role of transient loneliness in inhibiting individuals and their interaction partners from reaping the social rewards of positive-event disclosure, particularly among those who typically feel socially connected. Taken together, these studies expand the current understanding transient loneliness, revealing various social-cognitive and behavioral consequences which could impede the social-reaffiliation process, and thus contribute to the maintenance of loneliness over time.

This thesis is a study of the socio-economic changes in the Bolivarian Republic of Venezuela since the new government came into office in 1999. The research hypothesis for this thesis is that the changes and parallel socioeconomic structures being implemented in Venezuela since 1999 have decreased structural violence, and have provided more inclusion for previously excluded people. As the methodology used is qualitative, utilizing textual analysis to conduct a case study, academic journals from the fields of conflict resolution, sociology, political science, public health, cultural studies and economics were relied upon for the most part. This study of structural violence and exclusion has necessitated the contextualization of the situation, and as such, neoliberalism as a major influence has been discussed to aid in understanding and drawing conclusions. The results indicate that the changes and parallel socioeconomic structures being implemented in Venezuela since 1999 have decreased structural violence, and have provided more inclusion for previously excluded people.

The majority of literature on the work-family interface has focused on, and provided evidence of, the conflict associated with engagement in both work and family roles (Eby, Casper, Lockwood, Bordeaux, & Brinley, 2005). Research examining the positive aspects of work and family participation remains limited. The current study investigated how work-family positive spillover is transferred between members of the supervisor-employee dyad and subsequently how this affects employee sleep outcomes. It was hypothesized that work-to-family affective positive spillover experienced by supervisors would crossover to employees and increase their experiences of work-to-family affective positive spillover. In turn, this would allow for better employee sleep. It was also proposed that these relationships would depend on the level of employee perceptions of family-supportive supervisor behaviors (FSSB), such that higher levels of FSSB would result in higher levels of employee positive spillover and better employee sleep. As part of a larger study, survey data were collected in a sample of 696 workers supervised by 180 managers in the information technology sector. Contrary to expectations, results indicated that supervisor positive spillover was negatively related to employee positive spillover. Furthermore, FSSB moderated the association between supervisor positive spillover and employee sleep duration, such that the relationship between supervisor positive spillover and employee sleep duration was positive under high levels of FSSB, but negative under low levels of FSSB. Again, this finding was contrary to expectations. Alternative explanations are discussed.

Indiana University-Purdue University Indianapolis (IUPUI) / Stroke is a sudden and devastating medical condition. People who experience a stroke tend to have long-term physical limitations including impaired walking as part of the ongoing consequences of stroke. While a variety of rehabilitation interventions have demonstrated efficacy for improving walking after stroke, none of the interventions have emerged as superior, and prior to this study, therapeutic-yoga had not been tested as an intervention to improve walking recovery after stroke. METHODS: This study was a secondary data analysis of group therapeutic-yoga on walking recovery measures including walking speed, walking distance, and spatiotemporal step parameter symmetry. The walking recovery measures were collected as secondary outcomes in a sub-sample (n=12) in a pilot randomized controlled study (n=47) designed to test the efficacy of 8-weeks of group therapeutic-yoga on balance and fear of falling. Participants in the current study completed 12-weeks of group therapeutic yoga with outcome assessments at baseline, 8-weeks, and 12-weeks. The main analysis was repeated measures ANOVA to assess the main effect of time with additional analyses including effect sizes, percent of participants achieving change greater than or equal to minimal detectable change (MDC), and mean change score comparisons between baseline and 8-weeks, 8-weeks and 12-weeks, and baseline and 12-weeks. RESULTS: Twelve people with chronic stroke enrolled in the study with 9 completing the intervention and all 3 assessments. No significant main effect of time was found on any of the variables of interest. Walking distance demonstrated a trend toward significant change (p=0.064) and step length symmetry demonstrated significant change (p=0.05) between baseline and 12-weeks. Several spatiotemporal step parameter symmetry ratios demonstrated small to medium effect sizes with the majority (91%) being a negative effect. CONCLUSION: Twelve weeks of group therapeutic-yoga appears to be feasible in a population of people with chronic stroke. Walking distance and step parameter symmetry should be tested in a larger sample. An improved understanding of the impact, progression, and remediation of walking asymmetry is needed.

No description available.

This dissertation is an empirical investigation into the roles that different quantifiable and measurable perceptions play in defining individual behavior across a variety of decision-making contexts. In particular, the focus lies on smokers and the choices they make with regard to smoking and beyond. Chapter 1 analyzes a nationally representative sample of adults (23 years and older) in the United States, pertaining to the Annenberg Perception of Tobacco Risk Survey II (1999-2000). It is observed that three dimensions to smoking behavior viz., risk, temporality and addiction, interact to determine the smoking status of an individual. Although previous studies mostly looked into each of these dimensions in isolation, in this chapter, we empirically illustrate how perceptions on risk, time dimensions and addiction, jointly influence the smoking behavior of adults. Chapter 2 casts the smoker in the role of a parent and explores parental behavior towards the general health-risks facing their children. Using the dataset from a survey (2009), conducted in Orlando, Florida, on parents, having at least one child aged between 1 and 16 years, the chapter arrives at two findings relevant for policy: i) In each of the ‗smoker‘ and ‗non-smoker‘ parent categories, parents exhibit equal concern for themselves and their children, and ii) the level of concern shown by smoker-parents, towards health-risks faced by their children, is the same as that shown by their non-smoking counterparts. The analysis in this chapter also affirms the need to incorporate subjective risk assessment in willingness-to-pay (WTP) exercises to facilitate a deeper behavioral analysis of health risk valuation. Lastly, in Chapter 3, we focus on the issue of quantitative assessment of the perception of health risks from smoking. Particular interest lies in understanding how variants of a metric - namely, a survey question - have been employed in academic studies and industry-surveys, in order to measure smoking-related risk-perceptions. In the process of reviewing select tobacco-industry survey iv records, we analyze the implications of different features of this metric, (e.g., use of a ‗probe‘, the ‗Don‘t Know‘ option), and various interview modes (e.g. telephonic, face-to-face), for the estimates of perceived risk arrived at in these studies. The review makes clear that two aspects of health risks from smoking – the risk of contracting a smoking-related disease, as against the risk of prematurely dying from it conditional upon getting affected – have not been jointly explored so far. The dataset obtained from the Family Heart Disease and Prevention Survey (November 2010-March 2011), provides a unique opportunity to explore these two kinds of probabilities, particularly with regard to the risks of lung-cancer from smoking. Chapter 3 concludes by illustrating how individuals evaluate both these aspects of health-risks. While the probability of getting lung-cancer is found to be overestimated in conjunction with previous studies, the conditional probability of premature death is severely underestimated. Additionally, it is found that individuals‘ subjective assessments of either of these risk aspects predict smoking behavior in an identical manner. This calls into question the so-called ‗rationality‘ of smoking decisions with implications for policies designed for the control of tobacco consumption.

Cardiovascular disease (e.g., myocardial infarction, stroke, coronary artery disease) is the leading cause of death and disability worldwide. There is a growing body of literature that indicates sexual minority (e.g., gay, lesbian, bisexual, queer) adults are at a higher risk of cardiovascular disease than their heterosexual counterparts. The aim of this dissertation was to identify factors that contribute to the cardiovascular health (CVH) disparities that have been observed among sexual minority individuals. Guided by an adaptation of the minority stress model of CVH among sexual minority individuals, this dissertation includes three studies. In the first study (i.e., Chapter 2), we conducted a scoping review of the literature that investigated social determinants of cardiovascular health among sexual minority adults. Although findings were mixed, several social determinants of health were found to influence the CVH of sexual minority adults. For instance, sexual minority adults who lived in environments that were more supportive of sexual and gender minority people had lower odds of being overweight or obese. In the second study (i.e., Chapter 3), we used data from a racially and ethnically diverse sample of sexual minority women to examine the associations of family-related factors (i.e., sexual identity disclosure and family social support) with self-reported incident hypertension. Additionally, we examined whether these associations were moderated by race/ethnicity and sexual identity, or mediated by depressive symptoms. We found that higher levels of family social support were associated with lower levels of depressive symptoms among sexual minority women. However, family-related factors were not associated with self-reported incident hypertension. Further, race/ethnicity and sexual identity did not moderate the associations between family-related factors and reported incident hypertension. In the third study (i.e., Chapter 4), we used data from a nationally representative sample of adults to investigate sexual identity differences in ideal CVH (as defined by the American Heart Association’s Life Simple 7) and whether these associations were mediated by depressive symptoms. Compared to exclusively heterosexual women, mostly heterosexual and lesbian women were less likely to meet ideal criteria for tobacco use. In contrast, lesbian women were more likely to meet ideal criteria for glycosylated hemoglobin than exclusively heterosexual women. Among men, relative to exclusively heterosexual men, mostly heterosexual men were less likely to meet ideal criteria for tobacco use. Gay and bisexual men were less likely to meet ideal criteria for physical activity, whereas gay men were more likely to meet ideal criteria for body mass index compared to exclusively heterosexual men. Bisexual men were less likely to meet ideal criteria for blood pressure relative to exclusively heterosexual men. Depressive symptoms were found to partially mediate the association between sexual identity and physical activity only among mostly heterosexual women. Overall, these dissertation findings highlight CVH disparities among sexual minority adults. Clinicians should be educated about the CVH disparities that have been documented among sexual minority adults to provide personalized and culturally competent care. Results also indicate there is a need to develop behavioral interventions tailored specifically to the needs of sexual minority adults to improve their CVH outcomes and reduce CVH-related disparities.

Background: Sexual minority women (SMW; e.g., lesbian, bisexual women) are at substantially higher risk for hazardous drinking (HD) than their heterosexual, cisgender counterparts. There is considerable evidence that minority stressors at the individual (e.g., internalized stigma) and interpersonal (e.g., discrimination) levels are associated with HD among SMW, but minority stressors at the structural level (e.g., structural stigma) are understudied. Further, there is a wide gap in the literature on the relationships between multilevel minority stressors and HD. Additionally, there is evidence that these associations may differ by race/ethnicity and sexual identity, but relatively little is known about these differences, particularly in a multilevel context. Methods: This dissertation includes three studies that were guided by an adaptation of the minority stress model and the social ecological model. In the first study we conducted a systematic review of quantitative research studies that examined associations between structural stigma and alcohol-related outcomes among sexual and gender minority (SGM) adults in the United States. In the second study we used data from a diverse sample of SMW enrolled in the Chicago Health and Life Experiences of Women (CHLEW) study to determine whether structural stigma at Wave 4 (2017-2019) was prospectively associated with HD at Wave 5 (2019-2022), and whether this association was attenuated when accounting for individual- (i.e., internalized stigma, stigma consciousness) and interpersonal- (i.e., discrimination, sexual identity concealment) level minority stressors. In the third study we used data from Waves 4 and 5 of the CHLEW study to examine whether associations between multilevel minority stressors (i.e., internalized stigma, stigma consciousness, discrimination, sexual identity concealment, structural stigma) and HD varied by race/ethnicity and sexual identity. Results: The systematic review included 11 studies. There was moderate to strong support for a positive association between structural stigma and poor alcohol-related outcomes among SGM people, with differences by gender, sexual identity, race, and ethnicity. All studies used cross-sectional designs, and nearly half utilized non-probability samples. Transgender and nonbinary people, SGM people of color, and sexual identity subgroups beyond gay, lesbian, and heterosexual were underrepresented. Multilevel stigma and resiliency factors were understudied. In the second study, structural stigma was positively associated with HD alone, and when combined with interpersonal-level minority stressors. With the addition of individual-level minority stressors, the association between structural stigma and HD was attenuated, with partial attenuation (i.e., structural stigma was still significant) in the model combining all three levels, and full attenuation (i.e., structural stigma was no longer significant) in the model with only structural stigma and individual-level stressors. Discrimination was negatively associated with HD in the fully combined model and was not associated with HD in any other models. In the third study, we found that associations between structural stigma and HD did not vary by race/ethnicity or sexual identity. However, the associations between individual-level minority stressors (i.e., internalized stigma, stigma consciousness) and interpersonal-level minority stressors (i.e., sexual identity concealment) with HD varied somewhat by race/ethnicity and sexual identity. Conclusions: Findings from this dissertation highlight the importance of structural stigma in SMW’s HD and underscore the importance of both structural-level and multilevel minority stressors in designing interventions to effectively address HD drinking disparities and inequities among SMW. Future research is needed using intersectional approaches with probability samples, longitudinal designs, expanded measures of structural stigma, and samples that reflect the diversity of SGM people.