Huntington's Disease (HD) is a rare condition that has been under-researched by the medical professions and psychologists alike. There is a clear lack of psychological literature on the subject of HD and furthermore, there are no adequate QoL scales available for use by spousal carers. The development of a HD specific QoL scale (HDQoL-C) for this special population, brings together theoretical constructs and practical application in order to produce a user-friendly QoL measurement for spousal carers of HD patients.

Venous leg ulceration has a high recurrence rate. Patients with healed or frequently recurring venous ulceration are required to perform self-care behaviours to prevent recurrence or promote healing, but many find these difficult to perform. Bandura’s self-efficacy theory is a widely used and robust behaviour change model and underpins many interventions designed to promote self-care in a variety of chronic conditions. By identifying areas where patients may experience difficulty in performing self-care, interventions can be developed to strengthen their self-efficacy beliefs in performing these activities successfully. There are currently a variety of self-efficacy scales available to measure self-efficacy in a variety of conditions; but not a disease-specific scale for use with venous ulcer patients. The aim of this study, therefore, was to develop a disease-specific, patient-focused self-efficacy scale for patients with healed venous leg ulceration. Phase 1 consisted of a qualitative design and used focus group methodology to generate an item pool for potential inclusion into the scale from the patients’ perspective. In phase 2, factor analysis using equamax orthogonal rotation methods was used to reduce the items from 60 to 30, resulting in 5 major domains: general self-care; daily self-care tasks; normal living; developing expertise and avoiding trauma. Preliminary reliability studies indicated that the developed scale, VeLUSET© has good internal consistency, with an overall Cronbach alpha of .929 and a strong test-re-test reliability. Furthermore, correlation with the General Self-Efficacy Scale demonstrated a strong positive relationship between the two scales. These results indicate that the VeLUSET©, although still in the early validation stages, is a reliable instrument to measure venous leg ulcer patients’ self-efficacy in performing self-care tasks within clinical practice. The development of this disease-specific tool has now filled a gap in the research on managing patients with healed venous leg ulceration.

The purpose of this study was to develop and test the Experience of Supervision Scale, which measures the experience of supervisory behaviors from the perspective of child welfare workers. Child welfare supervision is gaining increased attention as states struggle to improve performance measures of their child welfare systems. However, the lack of a standardized instrument which measures supervision through an analysis of supervisory behaviors from the supervisee’s perspective has hindered efforts in these areas. The Experience of Supervision Scale is based on Kadushin’s three function casework supervision model of supervision (administrative, educational, and supportive) which was chosen as the theoretical framework due to this model’s emphasis on public agency clinical case work practice. Scale items were generated through focus groups of child welfare workers and supervisors. Items were reviewed by an expert panel and the scale was then administered to a statewide sample of 165 child welfare workers. The refined Experience of Supervision Scale consists of 32 items. In this study, it demonstrated high internal consistency with a Cronbach’s alpha of .962. Factor analysis yielded a three factor solution consistent with the casework model of supervision’s structure, while also suggesting slight modifications to the model. The three factors derived included: Performance Support, Emotional support/Availability, and Administrative activities. The results of this study suggest that the Experience of Supervision Scale has appropriate psychometric properties for use in complex research in which casework supervision is a variable.

The role of Certified Registered Nurse Anesthetists (CRNAs) in the delivery of anesthesia care is evolving given the recent recommendations for Institute of Medicine and provisions in the Affordable Care Act. Despite rigorous clinical training and consistent outcomes studies to support quality care given by CRNAs, the scope of practice of nurse anesthetists is frequently limited, and they do not practice to the full extent of their education and training. As health care spending becomes more constrained and demand for anesthesia services rises, the role of nurse anesthetists as more autonomous providers of anesthesia may be required to maintain access to quality care in a cost-conscious environment. Understanding the factors that influence one’s decision to engage in a broad scope of practice may guide training and recruiting practices. Using Bandura’s Self-Efficacy Theory as a framework to conceptualize scope of practice, an internet based survey of a cross-section of practicing CRNAs was conducted. Subjects responded to questions to describe the geography of their practice, experience as a civilian or military CRNA, and detailed clinical training variables. A composite score was created to gauge overall quality of clinical training. Each CRNA then rated their global scope of practice using a novel SOP-VAS, from 0-100. 1409 subjects participated in this study, yielding 1202 usable data sets. CRNAs practicing in rural locations exhibited higher mean SOP scores than those practicing in urban and suburban locations (p<0.001). CRNAs practicing in states that had opted-out of physician supervision had higher mean SOP scores (p<0.001). Years in Practice was positively correlated with SOP (p<0.01), however months on active duty in the military as a CRNA did not show a statistically significant correlation with SOP. Gender and the composite quality score also demonstrated a statistically significant affect on SOP. Regression modeling using significant predictors from prior analyses resulted in predictive model to describe SOP (p<0.001). Use of the novel SOP-VAS was found to be a reliable and valid tool to measure SOP among nurse anesthetists. Further study is warranted to identify additional factors that may contribute to scope of practice among nurse anesthetists.

Decreased sound tolerance (DST) conditions, including misophonia and hyperacusis, are emerging clinical conditions in behavioral medicine. Misophonia involves an extreme emotional response (often anger, disgust, or annoyance) to specific sounds (such as people chewing, swallowing, tapping their foot on the floor, etc.), while hyperacusis is defined by high sensitivity to sounds below normal sound sensitivity thresholds. Although research on these DST conditions is increasing, clearly defined prevalence rates, associations with other mental health conditions, and development of assessment tools that can identify and differentiate DST symptoms are needed. Research and clinical reports also suggest that DST problems are more likely to occur in individuals affected by tinnitus, and that drawing upon a bio-psychosocial conceptualization of tinnitus and other behavioral medicine conditions may be useful in understanding and treating DST conditions. This cross-sectional survey study was administered to college student (N=451) and community adult (N=375) samples and investigated DST prevalence rates, clinical correlates, and risk factors and mechanisms of action for misophonia and hyperacusis. In addition, the study developed and validated a new scale to identify misophonia and hyperacusis type sound sensitivity. Nearly 35% of individuals surveyed reported some degree of general auditory sensitivity, with 15-63% endorsing misophonia symptoms, and 17-26% endorsing hyperacusis symptoms, with rates depending on assessment method. Moderate to strong correlations were found between DST conditions and other mental and physical health conditions, including obsessive compulsive disorder, autism-spectrum traits, anxiety, depression, social phobia, medical conditions, and somatic and neurobehavioral symptoms. Mediation models revealed that the process by which misophonia symptoms become clinically significant and functionally impairing is partially mediated by amplification of bodily sensations and anxiety sensitivity. Risk factors for functional impairment related to misophonia symptoms were identified in moderation analyses and included neuroticism, synesthesia, and sensory sensitivity. An assessment instrument, the DST-10, and its subscales the Loudness Sensitivity Scale and Human Sounds Scale, was subjected to exploratory and confirmatory factor analysis and initial evidence for construct validity was demonstrated. This study was the first to assess hyperacusis, misophonia, and tinnitus rates in large general population samples and provides initial support for conceptualizing DST problems as behavioral medicine conditions.

Students’ perceptions of feedback can impact other writing constructs, such as motivation, self-efficacy, self-regulation, and achievement (Ekholm, Zumbrunn, & Conklin, 2015; Magno & Amarles, 2011; Zumbrunn, Marrs, & Mewborn, 2016; Zumbrunn, 2013). The goal of this study was to develop a valid and reliable instrument for measuring students’ perceptions of writing feedback. Evidence for validity and reliability were gathered throughout the development of the Student Perceptions of Writing Feedback (PoWF) Scale, a self-report questionnaire that asks students how they perceive feedback they get on their writing from their teachers. Items on the PoWF reflected the extant literature on students’ feedback perceptions. The PoWF was administered to 275 secondary students attending a suburban, mid-Atlantic high school. Exploratory factor analysis (EFA) yielded a four-factor structure of students’ feedback perceptions that accounted for 55 percent of the variance. Given the important role feedback may have in improving student writing, it is important to understand students’ perceptions of writing feedback, which is a relatively new construct. This measurement study was a critical first step toward a better understanding of students’ writing feedback perceptions as well as related theoretical implications.

Manufacturing organisations have placed significant attention to the potential of industrial human-robot collaboration (HRC) as a means for enhancing productivity and product quality. This concept has predominantly been seen from an engineering and safety aspect, while the human related issues tend to be disregarded. As the key human factors relevant to industrial HRC have not yet been fully investigated, the research presented in this thesis sought to develop a human factors tool to enable the successful implementation of industrial HRC. First, a theoretical framework was developed which collected the key organisational and individual level human factors by reviewing comparable contexts to HRC. The human factors at each level were investigated separately. To identify whether the organisational human factors outlined in the theoretical framework were enablers or barriers, an industrial exploratory case study was conducted where traditional manual work was being automated. The implications provided an initial roadmap of the key organisational human factors that need to be considered as well as the critical inter-relations between them. From the list of individual level human factors identified in the theoretical framework, the focus was given on exploring the development of trust between human workers and industrial robots. A psychometric scale that measures trust specifically in industrial HRC was developed. The scale offers the opportunity to system designers to identify the key system aspects that can be manipulated to optimise trust in industrial HRC. Finally, the results were gathered together to address the overall aim of the research. A human factors guidance tool was developed which provides practitioners propositions to enable successful implementation of industrial HRC.

For decades, researchers have shown interest in nurses' intention to quit. Studies reveal that 17-54% of all nurses have an intention of leaving their workplace and longitudinal studies have found a significant relation between the intention and quitting. With a global shortage of nurses and an increasing need for care, the situation is critical. Results of meta-analyses show a myriad of underlying factors, loss of joint effort and a missing synthesis of measuring instruments. The aim of this study was to develop and evaluate a multidimensional instrument that measures nurses' intention to quit. 33 articles were reviewed and used to construct a 50-item questionnaire. Ten areas were found relevant: demographic, career, wages, schedule/working hours, organization, manager, work environment, work climate, health, and intention to quit. Each area became a dimension, a subscale to measure causes behind nurses' intention to quit. A questionnaire survey was conducted at a hospital in central Sweden (n = 114). The results reveal that the constructed scale Nurses’ intention to quit (NITQ) has good internal consistency (.82 - .85). Each subscale correlates well and is significant with the variable intention to quit and a standard multiple regression was statistically significant through the whole model (F (8,105) = 27,10, p &lt; .001), explaining a variance of 67,4% in the dependent variable intention to quit. The results indicate that NITQ fulfills its purpose as a measuring instrument finding nurses’ intention to quit as well as the underlying factors which give rise to the thoughts of quitting.

Information systems (IS) research frequently uses survey data to measure the interplay between technological systems and human beings. Researchers have developed sophisticated procedures to build and validate multi-item scales that measure latent constructs. The vast majority of IS studies uses classical test theory (CTT), but this approach suffers from three major theoretical shortcomings: (1) it assumes a linear relationship between the latent variable and observed scores, which rarely represents the empirical reality of behavioral constructs; (2) the true score can either not be estimated directly or only by making assumptions that are difficult to be met; and (3) parameters such as reliability, discrimination, location, or factor loadings depend on the sample being used. To address these issues, we present item response theory (IRT) as a collection of viable alternatives for measuring continuous latent variables by means of categorical indicators (i.e., measurement variables). IRT offers several advantages: (1) it assumes nonlinear relationships; (2) it allows more appropriate estimation of the true score; (3) it can estimate item parameters independently of the sample being used; (4) it allows the researcher to select items that are in accordance with a desired model; and (5) it applies and generalizes concepts such as reliability and internal consistency, and thus allows researchers to derive more information about the measurement process. We use a CTT approach as well as Rasch models (a special class of IRT models) to demonstrate how a scale for measuring hedonic aspects of websites is developed under both approaches. The results illustrate how IRT can be successfully applied in IS research and provide better scale results than CTT. We conclude by explaining the most appropriate circumstances for applying IRT, as well as the limitations of IRT.

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