Gait biomechanics have been studied extensively. Many existing studies, though, have been performed in a controlled laboratory setting, and assumed that measures obtained are representative of gait in a naturalistic environment (e.g., outdoors). Several environmental and psychological factors may contribute to differences between these environments, and identifying any such differences is important for generalizing results outside the laboratory. The purpose of this study was to test the implicit assumption that gait inside a research laboratory does not differ from gait outdoors, when a participant is unaware of data collection in the latter. Means and interquartile ranges (IQR) of several spatio-temporal and kinematic gait characteristics were obtained from 19 young adults during several gait conditions both inside a laboratory environment and outdoors. Four comparisons were made between the two environments, including conditions involving: 1) self-selected speeds, 2) matching outdoors self-selected speeds, 3) matching outdoors self-selected speeds while carrying a crate, and 4) matching outdoors hurried speeds. Spatio-temporal variables differed between the two environments in that self-selected walking speed was 1.7% slower inside the lab and cadence was 1.4-2.6% lower for all four comparisons. At heel contact, the foot was 4.4-8.1% more dorsiflexed inside the lab for all comparisons except in matching hurried outdoors walking speed. Minimum toe clearance was 6.5-16.2% lower outdoors for all four comparisons. It is unclear if these differences impair the ability to generalize gait study results to outside the laboratory. Nevertheless, some specific differences exist in gait between environments, and that research should recognize. / Master of Science

Introduction: The Hawthorne effect, or behaviour change due to awareness of being observed, is believed to inflate directly observed hand hygiene compliance rates, but evidence is limited. Methods: A real-time location system tracked hospital hand hygiene auditors and recorded alcohol-based hand rub and soap dispenses. Rates of hand hygiene events per dispenser per hour within sight of auditors were compared to dispensers not exposed to auditors. Results: The event rate in dispensers visible to auditors (3.75/dispenser/hour) was significantly higher than unexposed dispensers at the same time (1.48) and in prior weeks (1.07). The rate increased significantly when auditors were present compared to five minutes prior to arrival. There were no significant changes inside patient rooms. Conclusions: Hand hygiene event rates increase in hallways when auditors are visible and the increase occurs after the auditors’ arrival, consistent with the existence of a Hawthorne effect localized to areas where auditors are visible.

This study attempted to create experimentally the Hawthorne effect in a freshman general psychology class at Utah State University during tall quarter of 1967. It also attempted to discover the differential effect of cueing, sex, and relevance on the experimental creation of the Hawthorne effect as measured by six general psychology criterion tests. The design of this study included a control group and three experimental groups. The following five hypotheses were postulated: The experimental groups will show greater influence from the Hawthorne effect than the control group. Within the three experimental groups there will be an increasing Hawthorne effect with the least effect in the subject-object cue group and the greatest effect in the subject-object-observer group as compared to the control group. The females in all experimental groups will show significantly greater Hawthorne effect than males within the same groups. The group rating high on the Relevance scale will show significantly greater Hawthorne effect than the groups rating low in relevance. There will be sufficient interactive effects between factors to the extent that some will reach significance. The hypotheses were tested by means of analysis of covariance with ACT predicted grade point average as the covariate. None of the differences were significant at the .05 level. It was concluded that the Hawthorne effect does not exist as a potent enough variable to distort the influence of the independent variable on the dependent variable in educational and psychological investigations of short duration involving freshman university students. It was also concluded that the variables of Cueing, Sex, and Relevance are not functionally related to the creation of the Hawthorne effect and, therefore, need not be controlled.

Among the multitude of interventions to address the worst forms of child labor (WFCL), one of the responses to the presence of WFCL has been the institution of child labor monitoring (CLM). While systems to systematically monitor children with respect to their exposure and risks have been implemented, the degree of their efficacy and ultimately their effect on the targeted populations begs academic scrutiny. This dissertation seeks to provide an empirical view of the community-level dynamics that emerge in response to a community-based CLM program and their effects, in turn, on the CLM itself. An embedded multiple case study methodology, surveying longitudinally at two points in time using a mix of purposive and probability sampling techniques, was employed for this study. Two communities, Ahokwa in the Western Region, and Dwease in the Ashanti Region of Ghana, were selected as cases. The study finds that between the two points of observation - before and after the introduction of CLM - a profound reduction of WFCL is observed in Dwease, whereas much less reduction was observed in Ahokwa. A point-by-point analysis within and between the two villages reveals that individual, social and institutional factors worked together to transform behavior in Dwease. The principal change catalysts in Dwease were (a) a heightened awareness of child work hazards and a deepened parental investment in child education working at the individual level, coupled with (b) new norms created by the town’s opinion leaders and the emergence of peer accountability at the social level, and (c) monitoring carried out by the Community Data Collection (CDC) and enforcement carried out by the Community Child Protection Committee (CCPC) - the two new institutions constituting CLM at the community-level. The underlying social dynamic proved to be decisive: a tipping point was crossed in Dwease whereby progressive opinion leaders in the community, who, once sensitized to recognize the pejorative effects of CL/WFCL, created new social norms and spurred a critical mass of community members to rid their community of CL/WFCL. This study shows that with sufficient local ownership, and if properly instituted, the tandem operation of child protection committees and child labor monitoring enables a community to effectively detect, police and mitigate the practice of child labor and WFCL. / acase@tulane.edu

This study was an examination of the Hawthorne Effect in a verbal learning situation in an educational setting. The Hawthorne Effect was defined as the facilitating effect(s) produced in experimental situations when the subjects of the experiment expect that they are the objects of special attention. The purpose of the study was to determine if contamination by the Hawthorne Effect existed in an educational setting. Comparisons were made between "experimentally inexperienced" subjects and "experimentally experienced" subjects at both undergraduate and graduate levels. The task was to learn a list of paired associate terms, and to show learning retention by immediate replication of those terms. The focus of the study was upon the expected differences in performance of the control and experimental groups produced as a result of an effort to persuade experimental subjects that they had "unique" characteristics which would cause them to be exceptionally proficient. The control groups were given the task by the course instructor in a usual classroom setting,as an example of a curriculum objective. Recommendations for further research were as follows: (1) the personality variables of the researcher and those of the subjects being tested should be thoroughly delineated; (2) sex differences in performance should be scrutinized further, since there were indications that females did react differently from males in the experimental situation; (3) other academic disciplines should be examined with respect to susceptibility to the Hawthorne Effect; and (4) other social settings should be examined with respect to the Hawthorne Effect contamination.

Healthcare associated infections cause 75,000 to 80,000 deaths a year. Many are preventable with proper hand hygiene adherence (HHA). Worldwide, HHA range is between 40-60%, far below the 100% recommended. The purpose of this quantitative, cross-sectional, prospective study was to investigate any association between 15 demographic variables and HHA of ICU nurses. A convenience sample of 613 hand hygiene opportunities was collected by direct observation at each of 5ICUs (4 hospitals) in Texas for 8 consecutive hours each day for 3-5 days. The theoretical foundation guiding this study was the healthcare environment theory. The Statistical Package for Social Sciences software was used for descriptive and inferential analysis of data. An aggregated overall HHA rate of 64.09% was identified among all nurses, 66.88% among male nurses and 62.27% among female nurses. Number of children, age of the nurse, number of years of living in the U.S., and the number of years of active nursing practice were significantly associated with HHA (p = .000) using paired sample t-test. The potential social change impact of this study is identifying variables associated with HHA, identification and measurement of 4 barriers to HHA, measuring the Hawthorne Effect, identification of Low Gelers, High Gelers, and Super Gelers, average rate may not be indicative of what is happening in hospital, and call for standardization of surveillance methodology. Findings may lead to specific interventions to increase HHA among nurses with certain demographic characteristics.

American policing is shaped by an array of challenges. Police are expected to address crime and engage the community, yet police are held to higher expectations of accountability, effectiveness, and efficiency than ever before. Police legitimacy is the ability of the police to exercise their authority in the course of maintaining order, resolving conflicts, and solving problems (PERF, 2014). The procedural justice and police legitimacy literature suggest that by exhibiting procedurally just behaviors within police-citizen encounters, officers are considered legitimate by the public (PERF, 2014; Tyler, 2004, Tyler & Jackson, 2012). This study examines procedural justice through systematic observations of police-citizen encounters recorded by body worn cameras in one mid-Atlantic police agency. The four elements of procedural justice (participation, neutrality, dignity and respect, and trustworthiness) are assessed to examine police behavior and its outcomes. The research questions concern how police acting in procedurally just ways may influence citizen behaviors. Descriptive statistics indicate high levels of procedural justice. Regression analyses suggest that procedural justice may predict positive citizen behaviors within police-citizen encounters. This study highlights the significance of procedural justice as an antecedent to police legitimacy and offers a new mode of observation: body worn camera footage.