Information Studies Theses and Dissertations

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ACCESSIBILITY IN CONTEXT: UNDERSTANDING THE TRULY MOBILE EXPERIENCE OF USERS WITH MOTOR IMPAIRMENTS
(2014) Naftali, Maia; Findlater, Leah; History/Library & Information Systems; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
Touchscreen smartphones are becoming broadly adopted by the US population. Ensuring that these devices are accessible for people with disabilities is critical for equal access. For people with motor impairments, the vast majority of studies on touchscreen mobile accessibility have taken place in the laboratory. These studies show that while touchscreen input offers advantages, such as requiring less strength than physical buttons, it also presents accessibility challenges, such as the difficulty of tapping on small targets or making multitouch gestures. However, because of the focus on controlled lab settings, past work does not provide an understanding of contextual factors that impact smartphone use in everyday life, and the activities these devices enable for people with motor impairments. To investigate these issues, this thesis research includes two studies, first, an in-person study with four participants with motor impairments that included diary entries and an observational session, and, secondarily, an online survey with nine respondents. Using case study analysis for the in-person participants, we found that mobile devices have the potential to help motor-impaired users reduce the physical effort required for everyday tasks (e.g., turning on a TV, checking transit accessibility in advance), that challenges in touchscreen input still exist, and that the impact of situational impairments to this population can be impeding. The online survey results confirm these findings, for example, highlighting the difficulty of text input, particularly when users are out and mobile rather than at home. Based on these findings, future research should focus on the enhancement of current touchscreen input, exploring the potential of wearable devices for mobile accessibility, and designing more applications and services to improve access to physical world.
Advanced Content In State E-Government: Criteria for Evaluation
(2008-05-02) Zammarelli, Christopher Mark; Jaeger, Paul T; Library & Information Services; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
This study analyzes the use of five types of advanced content in state e-government: audio and video content, RSS feeds, podcasts, blogs, and participative services. State government portals and governors' websites were reviewed to determine if and how they implemented any of the five evaluation criteria. Points were assigned for the presence of these criteria, with additional points being granted for examples of advanced content that were deemed to be of quality based on defined measures. The study found many state e-government sites have implemented features that set standards for the use of advanced content in an e-government setting.
Alumni Perspectives on their Membership in an Intergenerational Participatory Design Team
(2018) McNally, Brenna; Druin, Allison; History/Library & Information Systems; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
Participatory Design (PD) gives technology users an active role in the design of the technologies they are meant to use. PD methods have been adapted for research with children to facilitate the creation of technologies that better meet children’s desires and expectations. While the benefits HCI practitioners receive from working with children in PD can include developing more child-centric interfaces and finding surprising new innovations, research is less clear on the participants’ perceptions of their experience—such as how they perceive matters that affect them or what personal gains intergenerational PD team participants may receive from their participation. Investigating the retrospective perspectives of adult and child members of intergenerational PD teams may enable researchers to improve or develop practices that are better aligned with participant expectations. Recent work has begun to look into the gains adults perceive from their participation on traditional PD projects, and has begun to observe gains to children during their participation on PD teams. However, the retrospective perspectives of adult and child alumni who were members of intergenerational PD teams have yet to be investigated. To understand how alumni of intergenerational PD teams perceive matters that affected their membership, I conducted anonymous, online surveys and follow-up interviews with three distinct participant groups from an intergenerational PD team: child design partner alumni, parents of child alumni, and adult design partner alumni. Outcomes include new understandings of 1) the perspectives of child design partner alumni with regard to the ethics of their previous participation, 2) the gains child design partners experience and attribute to their PD team participation from the perspectives of both child alumni and their parents, and 3) the gains that adult design partners experience and attribute to their PD team participation and their perspectives on membership. Throughout these findings participants describe how participation in intergenerational PD impacted their desire and perceived ability to pursue new goals and activities throughout their lives through the development of new skills, competencies, and mindsets. From these findings, I then synthesize ten recommendations toward the goal of making intergenerational PD better support the people who are involved in it.
AN ANALYSIS OF VARIABILITY IN NEWSPAPER REPORTING OF NATIONALLY COVERED TOPICS
(2019) Marciano, Fernando Santos; Butler, Brian; Master in Information Management; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
This study looks into variability in newspaper reporting of important national topics. Using a sample of seven hundred articles from ten newspapers, a quantitative analysis using analysis of variance (ANOVA) found that variability in the values of reported numerical facts was statistically significant. Further, a qualitative analysis was performed to identifying potential reasons for the variability. Variability is unique to each topic being covered; however, some follow predictable patterns, such as updates on developing stories.
Anywhere but the Reich: The Jews of Nazi Vienna's Applications for Emigration Aid, 1938-1940
(2021) Wachtel, Jennifer LeeAnne; Rozenblit, Marsha; History/Library & Information Systems; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
After Nazi Germany annexed Austria in the Anschluss in 1938, an immediate outpouring of antisemitic violence and legislation horrified the Jews of Vienna. Between 1938 and 1940, Viennese Jews applied to the Israelitische Kultusgemeinde Wien (Jewish Community of Vienna or IKG) for financial aid to emigrate. Through a close examination of emigration questionnaires Viennese Jews submitted to the IKG, I demonstrate the harrowing effect of the Anschluss and Kristallnacht (November 1938 pogrom) on Jews from all social classes. By centering how individual families engaged with the emigration process, I argue that Viennese Jews immediately recognized the need to flee and exercised enormous creativity to escape. Desperate Viennese Jews were willing to emigrate anywhere and obtain any job outside the Reich. Viennese Jews also demonstrated resilience in the face of Nazi terror by applying for financial aid to flee the Reich even as potential havens shut their doors to Jewish refugees.
Archival Workers as Climate Advocates
(2024) Wickner, Amy; Shilton, Katie; Library & Information Services; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
Real-life examples of climate response under material constraints capture the risks facing archives, records, and archival workers amid environmental change, and the factors that complicate climate action. In this dissertation, I sought to understand how climate, environment, and ecology shape archival workers' experiences, practices, and perspectives on the future, including their norms and expectations for making change. I used three interconnected methods: a critical review of six decades of scholarly and professional literature; a literary analysis of archival practices in seven climate fiction texts; and interviews with 13 archivists concerned about climate change. The core argument of this dissertation is that forms of slow violence – Nixon's term for harm that “occurs gradually and out of sight” – produce unresolvable double binds, which catalyze archival workers into a community of climate advocates. This research finds that archival workers are trying to pursue principled work in conditions that prevent them from doing so – not only the material limitations of work sites, but also political obstacles to taking climate action. They develop politically expedient strategies and tactics in response to local circumstances, while using public statements and campaigns to extend their advocacy across the field. As climate advocates, they oscillate between positions as insiders and outsiders in the field, never settling in one stance from which to effect change. While they share a commitment that archives matter to climate response, complexity and contradiction hold them together as a community of advocates. Two key points of disagreement lie at the buzzing center of this community: first, whether archives are primarily resources or obstacles to climate action; and second, to what extent archival climate responses should align with or resist power relations that organize the state of the field (and the planet). There's ample knowledge in the archives field of the significance of climate change, the environmental impacts to and of archival work, the need for archivists to respond to the crisis, and methods for responding. However, such answers make little difference in everyday change-making, if they don't also face head-on the material conditions of archival work and the political relations that determine and reproduce those conditions.
Archives in the Attic: Exile, Activism, and Memory in the Washington Committee for Human Rights in Argentina
(2019) Pyle, Perri; Rosemblatt, Karin; History/Library & Information Systems; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
Spurred by the human rights violations committed by the last Argentine dictatorship (1976-1983), exiled Argentines in Washington, D.C. formed the Washington Committee for Human Rights in Argentina (WCHRA) to facilitate the transnational exchange of information between those under threat in Argentina and political actors in the United States. This thesis outlines the story of the WCHRA through the records they created - kept for nearly forty years in an attic - and oral interviews with former members. The collection consists of letters, testimonies, petitions, and notes that reflect the group’s extensive network and provide insight into how Argentine exile groups inserted themselves into the larger human rights movement. By critically examining how one small group of activists came together, I explore how archival records enhance, challenge, and reveal new insights into the politics of exile, activism, and memory, as seen through the lens of the records they kept.
An Autoethnographic Account of Innovation at the US Department of Veterans Affairs
(2020) Casertano, Andrew E; Marciano, Richard; Library & Information Services; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
The history of the U.S. Department of Veterans Affairs (VA) health information technology (HIT) has been characterized by both enormous successes and catastrophic failures. While the VA was once hailed as the way to the future of twenty-first-century health care, many programs have been mismanaged, delayed, or flawed, resulting in the waste of hundreds of millions of taxpayer dollars. Since 2015 the U.S. Government Accountability Office (GAO) has designated HIT at the VA as being susceptible to waste, fraud, and mismanagement. The timely central research question I ask in this study is, can healthcare IT at the VA be healed? To address this question, I investigate a HIT case study at the VA Center of Innovation (VACI), originally designed to be the flagship initiative of the open government transformation at the VA. The Open Source Electronic Health Record Alliance (OSEHRA) was designed to promote the open innovation ecosystem public-private-academic partnership. Based on my fifteen years of experience at the VA, I use an autoethnographic methodology to make a significant value-added contribution to understanding and modeling the VA’s approach to innovation. I use several theoretical information system framework models including People, Process, and Technology (PPT), Technology, Organization and Environment (TOE), and Technology Adaptive Model (TAM) and propose a new adaptive theory to understand the inability of VA HIT to innovate. From the perspective of people and culture, I study retaliation against whistleblowers, organization behavioral integrity, and lack of transparency in communications. I examine the VA processes, including the different software development methodologies used, the development and operations process (DevOps) of an open-source application developed at VACI, the Radiology Protocol Tool Recorder (RAPTOR), a Veterans Health Information Systems and Technology Architecture (VistA) radiology workflow module. I find that the VA has chosen to migrate away from inhouse application software and buy commercial software. The impact of these People, Process, and Technology findings are representative of larger systemic failings and are appropriate examples to illustrate systemic issues associated with IT innovation at the VA. This autoethnographic account builds on first-hand project experience and literature-based insights.
A BAROMETER OF SCIENTIFIC CULTURE: THE DEBATED ROLE OF AMERICAN SCIENCE AT THE 1850’S SMITHSONIAN INSTITUTION
(2023) Buser, Allison; Woods, Colleen; History/Library & Information Systems; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
During the initial decade of the Smithsonian Institution’s existence, its first secretary, Joseph Henry, sought to establish an institution for the advancement of science that defied popular understandings of scientific work in the United States. From the end of the eighteenth century and into the nineteenth century, American science was infused with republican ideology and was widely expected to prioritize practical results that would directly benefit society at large. At the Smithsonian, Henry sought to establish a boundary between professional, theoretical science, conducted and distributed more selectively among experts, and wider public influence and demand for utilitarian scientific work. Examination of discourse in popular publications reveals that Henry’s plan created an ongoing public debate in the 1850s regarding the Smithsonian’s legitimate scientific mission. This included criticism of the Smithsonian publications program’s inaccessibility and lack of utility to the public as well as many alternative proposals for how the institution might be of better scientific use to Americans. Such expectations that Smithsonian research and resources would serve the general American population were also expressed throughout the correspondence of the Smithsonian Meteorology Project—the Institution’s first major scientific research initiative. Although Henry sought to create a boundary between theInstitution’s work and the public, the utilitarian demands of many of the project’s volunteer observers ensured that the practical goals of the public remained intertwined with Henry’s own goals to promote theoretical science in the development of the Smithsonian. The influential work of this extended scientific community was often made possible through the contributions of additional members of households. Close reading of the meteorological project correspondence reveals an extensive, although often officially unacknowledged, contribution from women and other individuals whose labor was often more fixed to the household. While the public volunteers of the project shaped the trajectory of the Smithsonian, the devalued labor of peripheral contributors to the Institution’s large-scale data work set important precedent for professional scientific frameworks at the end of the century. Overall, the relationship between the early Smithsonian and the public in the 1850s demonstrates that the process of establishing borders defining a professional/amateur dichotomy in American science was uneven. The Institution contended with republican expectations of the scientific public and its projects continued to rely upon contributors without formal or elite credentials who in turn demanded accessible and practical research and shaped scientific institutions. Despite Joseph Henry's contribution to the professionalization and specialization of science, the boundaries of science and who could participate in scientific research remained fluid through the mid-nineteenth century.
"Because We Were Too English:" John Kaye and the 1857 Indian Rebellion
(2017) Fairchild, Christina Lee; Price, Richard N; History/Library & Information Systems; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
Throughout the nineteenth century, no other rebellion received the same level of attention in Britain as the 1857 Indian Rebellion. This was one of the most written about events in the nineteenth century. The foremost writer on the rebellion is Sir John William Kaye. This thesis examines John Kaye’s writings on India before and after the rebellion. Kaye viewed the British-Indian relationship through a paternalistic lens. Kaye viewed the role of the British to uplift the condition of Indians through personal examples. He was therefore critical of the East India Company’s policies and actions which were detrimental to this agenda, while he still defended it as an institution of progress. After the 1857 Mutiny, Kaye re-examined his standpoint on British interference in India. He did not forsake his paternalistic viewpoint, which allowed Kaye to examine how British actions had caused a divide between the British officers and the sepoys.
Behavior Displacement in Sedentary and Screen Time Among Older Adults
(2024) Li, Mengying; Choe, Eun Kyoung; Library & Information Services; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
In this thesis, I examine sedentary and screen-based activities among older adults, aim- ing to offer insights for designing effective behavior displacement interventions. While displacement represents a potentially effective intervention in reducing sedentary behavior, research in this area has largely overlooked older adults. Through a 7-day diary study and debriefing interviews, I examine reasons and factors that influence older adults’ decisions to displace sedentary and screen-based activities. I find that attention demand and overall productivity and quality of activities are key factors that influence older adults’ decisions to engage in displacement. I identify internal and external catalysts for displacement and preferred displacement strategies by older adults in various conditions. These findings emphasize the importance of designing personalized and adaptive interventions to reduce sedentary time, considering the diverse preferences and agency of older adults.
Bigger, Better, Faster, More: Jet Fighter Development and Grand Strategy in the United States Air Force, 1947-1953
(2003-12-15) Linden, Jeremy Ryan; Sumida, Jon T.; Eckstein, Arthur; Olson, Keith; History/Library & Information Systems
United States Air Force jet fighter development and strategy in the post-World War II period is illustrative of the beginning stages of the strategy of annihilation that the United States has adopted in the late-20th and 21st centuries. Development and procurement of fighters is a complex process that must take into account the potential mission and purpose of the aircraft in overall strategy, the impact of that technology upon existing forces and missions, and the continuum of costs versus performance. The Air Force chose a developmental path for jet fighters which concentrated on the assurance that qualitatively superior aircraft could outperform greater numbers of technologically comparable enemy aircraft. The first section of this thesis provides documentary and secondary evidence concerning the transformation of air warfare due to jet technology. Section two argues the strategic significance of jet fighter development as a precursor of a strategy of annihilation.
BodyVis: Body Learning Through Wearable Sensing and Visualization
(2014) Norooz, Leyla; Froehlich, Jon E; Library & Information Services; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
Unlike external body parts, organs are invisible and untouchable, making it difficult for children to learn their size, position, and function. With the advent of low-cost sensing, ubiquitous computation, and emerging e-textiles, new teaching approaches are developing that link the physical and virtual worlds. In this thesis, I report on the design and evaluation of several wearable e-textile prototypes --called BodyVis--that combine embedded sensing and interactive visualization to reveal otherwise "invisible" parts and functions of the human body. Key findings from an open-ended cooperative inquiry design session with children were used as guidelines in developing the first prototype. Versions of the second prototype were developed before and after a second cooperative inquiry design session. The final prototype was then evaluated through three design evaluation sessions. Three examples of use demonstrate the potential of BodyVis to engage, excite, and pique children's curiosity in learning about the human body.
The Boom and the Bust: The Jewish Community of Portsmouth, VA, 1910-1930
(2016) Gunn, Allison R.; Rozenblit, Marsha L; History/Library & Information Systems; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
In 1917, Jews came in large numbers to Portsmouth, VA, for the economic opportunity offered by a booming World War I economy and the new market the war workers offered. Between 1907 and 1918 alone, the Jewish population grew by an astonishing 1,042%. The community declined rapidly, however, immediately after the war. The primary reason for the decline of the community was economic. Jews came to Portsmouth, not as laborers, but as retailers and business owners. They therefore relied upon a large, stable, local market which dissipated in the Interwar period. Studying Portsmouth reveals the foundational dynamics between Jewish communities and the local economy. In the period, American Jews relied on specific economic niches such as retail to prosper. When an economy was unfavorable for such businesses, Jewish communities did not thrive.
Breastfeeding Without Nursing: The Lived Experiences of Exclusive Pumpers
(2020) Jardine, Fiona Mary; St Jean, Beth; Library & Information Services; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
Worldwide, the overwhelming majority of parents initiate chest/breastfeeding at birth. Human milk is regarded as optimal nutrition for infants and the perfect version of milk for the first years of life; lactation also prevents disease in chest/breastfeeders. Most birth parents want to chest/breastfeed and it is seen as central to motherhood. Chest/breastfeeding is often challenging, resulting in early cessation. Exclusive pumping—that is, only expressing/pumping milk rather than nursing directly at the breast/chest—provides an alternative for those who cannot or do not want to nurse, while retaining most chest/breastfeeding benefits. Existing literature on EPing predominantly focuses on neonatal intensive care unit settings, milk composition, and quantitative data, such as secondary analyses of nationwide surveys. Despite the growing numbers of exclusive pumpers, there is little-to-no data concerning the lived experiences of exclusive pumpers, particularly pertaining to support needs and information provision. Through a retrospective, cross-sectional survey of over 2,000 exclusive pumpers and longitudinal follow-up with over 300 participants, the Breastfeeding Without Nursing study collected qualitative and quantitative data to explore their lived experiences, including: why some chest/breastfeeding exclusively pump; how they feel about it; and what information and support they need and where they find it. Themes within four domains—the circumstances surrounding exclusive pumping, affective experiences, information, and support—were identified through inductive thematic analysis. The findings of this analysis, combined with descriptive and statistical analysis of quantitative data, demonstrate that exclusive pumpers, in general, wanted to nurse at the breast, but as a result of a variety of socioecological influences, were unable to. This led to feelings of loss, grief, and anger, but also determination and pride. Participants needed earlier and better information, many having been incognizant of exclusive pumping despite receiving chest/breastfeeding education. Online support groups were vital sources of information and support; lactation consultants were often not regarded supportive or providing useful information. Having identified gaps in exclusive pumping information, education, and support, I suggest best practices and future research. Contributions to information science include recognizing the importance of education in overcoming incognizance and using a socioecological perspective to analyze the influences on information experience.
Building A Collection's Care Index: An Approach to Helping Preserve Our Cultural Heritage Before It Disappears
(2020) Langa, Lesley Anne; Bertot, John C; Punzalan, Ricardo L; Library & Information Services; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
Cultural heritage is important to everyone. Whether it is family heirlooms passed down through generations, or the archaeological evidence of lost civilizations, we preserve these things to have them for future generations. To protect them, it is important that specialists have the knowledge and skills to handle the multiple challenges that can result from, or that can prevent, deterioration. These professionals perform care duties regularly in organizations such as archives, libraries and museums. Any organization with an historical, art, or circulating collection that performs these duties is a collections-based institution, and these institutions are responsible for the difficult and specialized care of the collection items. This study analyzes data from a national survey called the Heritage Health Information (HHI) Study 2014 that asked collections-based institutions about their regular care practice. The HHI survey measured practice from U.S. institutions resulting in a robust 1,714 responses. New analysis in this dissertation builds a collections care index from HHI, then performs a multiple regression on the index score. The index process begins by identifying a common list of twelve key practices in collections care. Each practice is reviewed prior to the scoring in the index to ensure valid results. An original scoring rubric assigns a score to each practice, then all scores are added into a single composite index score. In a second analysis, the index score serves as the dependent variable in a multiple regression where organizational type, budget size, total staff count, and the count of collections items are independent variables to measure the effect each can have on the composite score. The findings from the index show that the highest count of scores clustered around the mid-range of the distribution indicating that most organizations are doing some care duties. The regression findings show large budgets had the greatest effect on scores. The index is the key contribution of this study serving as a tool to help organizations determine how their efforts to perform each responsibility contributes to their overall management. This has implications for performance management and resource allocations for cultural heritage organizations, as well as, professional associations.
Building Virtual Friendships through Mirrored Gestures
(2022) Oshiro, Miya Sanura; Leitch, Alex; Library & Information Services; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
During the COVID-19 pandemic isolation period, social gaming was an effective way for people to find connections and alleviate feelings of loneliness. However, the communication systems built within these games have limitations. In-game communication systems usually consist of emotes, predetermined avatar gestures, and simple chat features. Due to these limitations, critical social cues, such as nonverbal synchrony, are lost during these online interactions. This study evaluates the integration of nonverbal gesture synchrony in social games as a potential addition to existing communication systems to foster genuine social connections between players during online play. The game environment for this research study is an emote-based and a gesture-based version of the social game KANDI.io. When comparing the two versions in structured game sessions, this study found an enjoyment preference for the gesture-based experience. However, after further discussion, it was determined that there was no overall preference for this experience over the emote-based design. These results revealed that when engaging with open-play games like the gesture-based system, some players felt vulnerable, experienced player distrust, and became more conscious of the interaction context.
“But Hold Me Fast and Fear Me Not” Comparing Gender Roles in the Ballad Tam Lin and Medieval and Renaissance Scotland.
(2023) Conant, Charlotte; Bianchini, \Janna; History/Library & Information Systems; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
Tam Lin, a medieval Scottish Ballad tells the story of an unusually forceful young Lady Janet. Janet does many of the feats of strength in her story, defies her father, refuses to behave as a ‘good Christian woman’ might and suffers no consequences for her actions. She ends her story successfully married to a noble Christian man, having saved him from the evil pagan Fairy Queen. This ballad has been popular for centuries, and has been cited as a ballad unique to Scotland that represents Scottish culture. The ballad contains ideas that one might think contradictory to the ideas of a medieval Christian society, yet the ballad was so popular it had a ballet (now lost) and has survived for at least four hundred years. This dissertation examines the differences and similarities between the lack of consequences Janet suffers and what real women in Scotland from the Medieval Ages to the Early Modern period would have experienced. It also will delve into the various cultural groups that contributed to the ‘Scottish Nature’ of the ballad. Stories are told by humans all across the world, a ballad, likely sung in a group, in order to continue being told, must not go against the inherent social rules of the people performing it, or else act as a cautionary tale. However, since Janet does not end her story suffering, Tam Lin is not meant to be a cautionary tale. Why then, was this ballad, that might appear to be so contradictory to the society that was telling it, have managed to survive (and be so popular) to the current day and age.
Change Detection: Theoretical and Applied Approaches for Providing Updates Related to a Topic of Interest
(2024) Rogers, Kristine M.; Oard, Douglas; Library & Information Services; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
The type of user studied in this dissertation has built up expertise on a topic of interest to them, and regularly invests time to find updates on that topic. This research area—referred to within this dissertation as "change detection"—includes the user's process of identifying what has changed as well as internalizing the changes into their mental model. For these users who follow a specific topic over time, how might a system organize information to enable them to update their mental model quickly? Current information retrieval systems are largely not optimized for addressing the long-term change detection needs of users. This dissertation focuses on approaches for enhancing the change detection process, including for short documents (e.g., social media) as well as longer documents (e.g., news articles). This mixed methods exploration of change detection consists of four sections. First, this dissertation introduces a new theory: the Group-Pile-Arrange (GPA) Change Detection Theory. This theory is about organizing documents relevant to a topic of interest in order to accelerate an individual's ability to identify changes and update their mental model. The three components of this theory include: 1. Group the documents by theme; 2. Pile the grouped documents into an order; and 3. Arrange the piles in a meaningful way for the user. These steps could be applied in a range of ways, including using approaches driven by people (e.g., a research librarian providing information), computers (e.g., an information retrieval system), or a hybrid of the two. The second section of this dissertation includes the results of a survey on users' sort order preferences in social media. For this study, change detection was compared with three other use cases: following an event while it happens (experiential), running a search within social media, and browsing social media posts. Respondents recognized the change detection use case, with 66% of the respondents indicating that they perform change detection tasks on social media sites. When engaged in change detection tasks, these respondents showed a strong preference for posts to be clustered and presented in reverse chronological order, in alignment with the "group" and "pile" components of the GPA Change Detection Theory. These organization preferences were distinct from the other studied use cases. To further understand users' goals and preferences related to change detection, the third section of this dissertation includes the design and prototype implementation of a change detection system called Daybreak. The Daybreak system presents news articles relevant to a user's topic of interest and allows them to tag articles and apply tag labels. Based on these tags and tag labels, the system retrieves new results, groups them into subtopic clusters based on the user's tags, enables generation of chronological or relevance-based piles of documents, and arranges the piles by subtopic importance; for this study, rarity was used as a proxy for subtopic importance. The Daybreak system was used for a qualitative user study, using the framework method for analyzing and interpreting results. In this study, fifteen participants engaged in a change detection scenario across five simulated "days." The participants heavily leveraged the Daybreak system's clustering function when viewing results; there was a weak preference for chronological sorting of documents, compared to relevance ranking. The participants did not view rarity as an effective proxy for subtopic importance; instead, they preferred approaches that enabled them to indicate which subtopics were of greatest interest, such as pinning certain subtopics. The fourth and final component of this dissertation research describes an evaluation approach for comparing arrangements of subtopic clusters (piles). This evaluation approach uses Spearman's rank correlation coefficient to compare a user's ideal subtopic ordering with a variety of system-generated orderings. This includes a sample evaluation using data from the Daybreak user study to demonstrate how a formal evaluation would work. Based on the results of these four dissertation research components, it appears that the GPA Change Detection Theory provides a useful framework for organizing information for individuals engaged in change detection tasks. This research provides insights into users' change detection needs and behaviors that could be helpful for building or extending systems attempting to address this use case.
"Children Selecting Books in a Library": Extending Models of Information Behavior to a Recreational Setting
(2007-06-05) Reuter, Kara Anne; Neuman, Delia; Library & Information Services; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
Literacy researchers suggest that book-selection strategies are part of successful literacy development, and in several research studies children reported that finding books they like is the biggest barrier they face to reading. Despite much attention to particular aspects of children's reading habits, few studies have examined the processes children use to select books. Against this backdrop, this study undertook a qualitative investigation of primary-school children's selection of books for recreational reading in a public library over the summer. Book selection was examined from the perspective of library and information science (LIS) models of information behavior and relevance assessment. To expand LIS research into the recreational realm, the study also drew upon reader-response theory in education and uses-and-gratifications theory in communications. Using a multiple-case study design, the study collected questionnaire, interview, and observation data from 20 7- to 9-year-old children and their parents during several sessions at their homes and at the public library. The data were analyzed with a grounded-theory approach. During the study, the children spoke in general of the gratifications--cognitive, emotional, and social--that reading provides. When embarking on book selection at the library, however, they did not mention specific needs they sought to fill. When browsing the library, the children exhibited successively more involvement with books, examining them externally and internally and focusing on a variety of elements. The central aspects influencing children's selection of books were contents and reading experience. Several differences emerged among the children: older children were more purposeful in their behaviors than younger children; girls were more independent than boys; some children had strong preferences that influenced their book-selection practices; and children exhibited distinct book-selection strategies. Finally, children rarely acknowledged receiving formal instruction in book selection and faced a number of obstacles related to library terminology and concepts. Within the LIS field, this research contributes to an expanded understanding of information behavior. The findings have implications for strategies to encourage effective book selection through library instruction and parental involvement as well as for approaches to improve library services and systems, such as readers' advisory, shelf arrangement, and digital libraries.

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