Classic studies have examined the factors that influence the way in which people can solve difficult "insight" problems, which require creative solutions. Recent research has shown that guiding one's eye movements in a pattern spatially congruent with the solution improves the likelihood of formulating a spatial solution. The authors in this line of research argued that guiding eye movements in a pattern spatially equivalent to the solution of the problem yields an embodied cognitive benefit that aids problem solving. Specifically, guiding eye movements leads to the generation of a mental representation containing perceptual information that helps a problem solver mentally simulate the problem features, increasing likelihood to generate a solution to the problem. However, evidence from a small but critically relevant area of research supports that this embodied effect may be more simply a creativity-priming effect. The proposed research aimed to disentangle these ideas while addressing other research questions of interest: do embodied problem solving benefits transfer to later problem solving? Do individual differences in spatial ability influence how people solve these problems? The present study combined previously established methodologies in problem solving and analogical problem solving to investigate these research questions. Results of the present work tentatively support the embodied priming effect, mediated by a creativity-priming effect that influences problem solving performance. Both effects emerged after manipulating problem solvers' eye movements. There is also modest support for a link between spatial ability and analogical problem solving, but not initial problem solving. These results are interpreted through the lens of embodied cognitive theory, providing tentative support that guiding eye movements can influence reasoning through an enhancement of creativity.

The goal of this research was to assess the ability of readers to determine the emotion of a passage of text, be it fictional or non-fictional. The research includes examining how genre (fiction and non-fiction) and emotion (positive emotion, such as happiness, and negative emotion, such as anger) interact to form a reading experience. Reading is an activity that many, if not most, humans undertake in either a professional or leisure capacity. Researchers are thus interested in the effect reading has on the individual, particularly with regards to empathy. Some researchers believe reading fosters empathy; others think empathy might already be present in those who enjoy reading. A greater understanding of this dispute could be provided by general recognition theory (GRT). GRT allows researchers to investigate how stimulus dimensions interact in an observer's mind: on a perceptual or decisional level. In the context of reading, this allows researchers to look at how emotion is tied in with (or inseparable from) genre, or if the ability to determine the emotion of a passage is independent from the genre of the passage. In the reported studies, participants read passages and responded to questions on the passages and their content. Empathy scores significantly predicted discriminability of passage categories, as did reported hours spent reading per week. Non-fiction passages were easier to identify than fiction, and positive emotion classification was affiliated with non-fiction classification.

This dissertation focuses on a human operator's ability to perform rotational control of a three-dimensional object using two-degrees of freedom (DOF) interface devices. Although input devices designed specifically for 3D interaction exist, devices traditionally used for two-dimensional user interaction, such as a mouse or joystick, have become ubiquitous to computer tasks. This research examines a particular human-computer interaction issue that arises from stimulus-response compatibility between three-dimensional stimuli spaces and 2-DOF response sets. The focal point of this research is a phenomenon referred to here as accidental inversion. Accidental inversions occur when an operator erroneously moves a three-dimensional object in a direction opposite than was intended. Thus, the effect of accidental inversion results from a mismatch between the operator's intended and actual input. A key assumption in diagnosing the causal factors involved in the accidental inversion effect is contribution from both internal (i.e., having to do with the individual) and external (i.e., having to do with the environment) influences. Three experiments were conducted to study accidental inversion. The first examined population stereotype, a measure of a target population's natural response tendencies to particular stimuli for a particular task. Results indicated a strong population stereotype for horizontal rotations (i.e., yaw) and weak stereotype for vertical rotations (i.e., pitch). This effect was mediated by whether the task was in the context of flight or ground-based movement. The second experiment analyzed the subjective preference for two opposite input-response (I-R) mappings (i.e., how the system responds to different input into the controlling device) for a task requiring control over vertical rotation. Results indicated that subjective preferences for I-R mappings were not heavily polarized. The third experiment also focused on vertical rotational control and examined how subjective preference for a particular I-R mapping affected performance. Furthermore, this experiment also examined performance when interference was introduced in the form of a temporary interruption where the participant had to conduct the task using an opposite I-R mapping. Results indicated that, upon being interrupted with the opposite I-R mapping, the group who used the mapping they subjectively preferred did worse than the group who used the mapping they did not prefer. This research has implications for the design of human-machine systems requiring human-in-the-loop three-dimensional rotational control. Some human-machine systems can have significant consequences from even a single mistake caused by a human-operator accidentally providing the wrong input. Findings from this research lead to two primary recommendations to the design of human-machine systems: a) an easily accessible and clearly indicated method to select input-response mapping which is provided before beginning the actual task, b) be informed of the current input-response mapping in use.

The rapid growth of unmanned aircraft system (UAS) use in both the military and civil sectors has uncovered an array of challenges within the field. In terms of human factors and ergonomics, the influence of the unique physical design of the control stations used to pilot the unmanned aircraft on local muscular fatigue and discomfort are of great concern. This study was conducted to assess the influence of two display configurations, Side-by-Side (SS) and Stacked (ST), and two chairs, Ergonomic (EC) and Captain’s (CC), on mean and median power frequencies, root mean square amplitude, posture, discomfort, workload, and seat pressure. Sixteen participants [age: 24.75 ± 2.96 years; gender: 4 female/ 12 male; height: 177.56 ± 9.09 cm; weight: 81.37 ± 16.43 kg] completed four, 2-hour simulated UAS flights for all chair/display combinations. Eight participants piloted one, 6-hour simulated UAS flight in the display/chair combination which best minimized discomfort and fatigue in the two-hour flights, EC/SS. During the two-hour flights, muscle activity, discomfort, posture, workload, and seat pressure findings indicated increased muscular fatigue and discomfort over time. Generally, the EC/SS condition appeared to best mitigate muscular fatigue and postures associated with increased risk for the development of musculoskeletal disorders. Six-hour flight data failed to provide additional insights on the influence of extended duration flights on the dependent variables of this study. Finally, linear regression analysis revealed muscle activity can likely be predicted during UAS piloting tasks using the dependent variables in this study; however, the study failed to provide evidence that models built from two-hour data can accurately predict muscle activity out to six hours.

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For many years, nationwide, approximately one third of American high school students have not been graduating from high school. The dropout rate is one of the reasons cited for the implementation of the No Child Left Behind legislation, which highlighted the severity of the dropout problem and the imposing priorities and standards placed on school districts. Mississippi leads the nation in the rate of students who drop out of high school. The purpose of this study was to examine the factors that contribute to the dropout epidemic in secondary schools in the Jackson (Mississippi) Public School District where annually a high percentage of students, particularly African Americans, fail to graduate with their Grade 9 cohorts. This study used a descriptive and causal-comparative research design to identify the contributing factors to secondary school dropouts among 80 students enrolled in the Career Academic Placement (CAP) program in the Jackson Public School District. The Jackson Public Schools Dropout (JPSD) Questionnaire was utilized for the study. Differences in the students’ responses were examined using a Mann-Whitney U and Kruskal-Wallis analysis of variance (ANOVA). Findings in this study indicated that the number one factor that led students to decide to drop out of school was feeling that they were behind, or failing course work. This affected about 55% of the students, causing them to leave school early. Additional results revealed 15% of the respondents who dropped out were Grade 9 students, and approximately 15% of the respondents who dropped out were Grade 12 students. Approximately 42.5% of the students comprised 10th graders and 27.5% were 11th graders.

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Many clients drop out of therapy before reaching their goals, (Bohart & Wade, 2013) though research shows that being in therapy is more effective in producing change than not being in therapy, (Lambert, 1992). Little is known about what makes therapy effective (Davis & Piercy, 2007a, b; Pinsof & Wynne, 2000). The purpose of the present study was to understand what clients believe is productive about therapy, and how clients’ assessment of therapy productiveness impacts their decision to remain in therapy or to drop out of therapy. For the qualitative strand of this simultaneous convergent mixed methods study, grounded theory was used to inductively develop a common-factors informed model describing how productive change processes influence intended retention. The convenience sample consisted of 19 current clients in therapy with a marriage and family therapist. For the quantitative strand, participation involved completing a semi-structured interview and quantitative survey. Direct, binary logistic regression analyses were conducted to determine whether perceived productiveness, goal attainment and therapeutic alliance, predicted intended treatment retention or intended dropout. The convenience sample for quantitative analysis included the 19 qualitative participants, and continued sampling until adequate statistical power was reached with 72 participants. Mixed analysis strategy was data comparison for the purpose of triangulation. Qualitative results span three categories emerged from qualitative: client factors, therapy process factors and evaluation of progress. Client factors, including presenting problem factors, expectations and motivation were considered when participants made decisions about staying in therapy or dropping out of iii therapy. Therapy process factors, including therapists’ understanding of the presenting problem, therapeutic alliance, therapists interventions and the pacing and timing of those interventions were also considered when participants made decisions about staying in therapy or dropping out of therapy. When participants evaluated the progress made because of therapy, they evaluated changes in the presenting problem, symptom reduction, and noticed this progress took place outside of therapy. Quantitative results showed that goal attainment, therapeutic alliance and productiveness significantly predicted intended retention when each was tested as an individual predictor. When tested in a full model, containing goal attainment, therapeutic alliance and productiveness; only the task domain of therapeutic alliance emerged as significant. Results confirm the importance of therapeutic tasks to clients’ decision to stay in therapy or to drop out of therapy. Results contribute to the importance of common factors in keeping clients in therapy until they reach their goals. Further, results inform research, clinical practice and training in the MFT field. / Ph. D.

Performance measurement (PM) systems are commonly known for both their potential to enable significant improvement in organizational performance and success as well as the difficulty of actually obtaining these results. A review of the literature suggests that most applications of PM systems prove to be less effective than the design suggests or, in some cases, may fail to be institutionalized. While there have been many recent advancements in this area, the focus from researchers has been primarily on the design and use of these systems. More recent research suggests that the problem with these systems may be the execution and implementation of the system rather than the design. In response, researchers have investigated both enablers and barriers (more generally referred to as success factors) for PM systems. They generally assert that being aware of these factors and attempting to mitigate their effects increases the likelihood of system success and enables practitioners to realize the full potential benefit from these systems. While significant research has been conducted in this area, review of the literature suggests that there is little consistency among the studies with no consensus among researchers concerning terminology or definitions of factors. Analysis of the published literature suggests that this area is at a relatively early stage of maturity with many significant opportunities for further advancement of the research area. In this work, the existing published literature was synthesized and a comprehensive set of 29 potential success factors was identified, along with corresponding definitions. In addition, five distinct dimensions of PM implementation success were identified from the literature synthesis. These literature review results were used to design a survey questionnaire to assess actual organizational practice in an empirical field study. An exploratory factor analysis was conducted to refine the constructs corresponding to potential success factors and implementation success outcomes. The resulting final variables were investigated using regression analysis to identify the factors most strongly associated with each dimension of implementation success. / Ph. D.