BreastScreening: On the Use of Multi-Modality in Medical Imaging Diagnosis

This paper describes the field research, design and comparative deployment of a multimodal medical imaging user interface for breast screening. The main contributions described here are threefold: 1) The design of an advanced visual interface for multimodal diagnosis of breast cancer (BreastScreening); 2) Insights from the field comparison of single vs multimodality screening of breast cancer diagnosis with 31 clinicians and 566 images, and 3) The visualization of the two main types of breast lesions in the following image modalities: (i) MammoGraphy (MG) in both Craniocaudal (CC) and Mediolateral oblique (MLO) views; (ii) UltraSound (US); and (iii) Magnetic Resonance Imaging (MRI). We summarize our work with recommendations from the radiologists for guiding the future design of medical imaging interfaces.Comment: AVI 2020 Short Papers, 5 pages, 2 figures, for associated files, see https://github.com/MIMBCD-UI/avi-2020-short-pape

The Importance of Play: Identification with Video Game Characters\u27 Intersectional Effects on Bias

Video games are steadily becoming one of the largest and most influential forms of media in history. Today, video games are so popular that the Nintendo mascot Mario from the Mario Brothers video game series is more recognized than Disney\u27s Mickey Mouse. The reach and influence of video games is cause for celebration and concern. After all, just like other forms of media video games can influence audiences far beyond their play sessions. Media can influence everything from how individuals treat others, to governmental policies. With such a large scope of influence over who they reach and how they affect society it\u27s necessary to examine how video games represent real world people. Representation in video games has the potential to influence audiences\u27 perceptions of and attitudes towards real people. Video games already come under constant scrutiny for their numerous portrayals of sexist and racist imagery. These negative portrayals can affect real world biases against disenfranchised groups. Which in some cases can even lead to an increase in violence against those groups. Many forms of passive media, such as books and television, have already been analyzed to discern how their use of diverse non-stereotypical representation can combat biases, promote empathy, and encourage tolerance among their audiences. Video games have been researched in a similar manner, but stand apart from these mediums in an important way. Video games allow participants to take an active role in their entertainment. Unlike a book or a movie a video game offers participants control over the characters and the actions those characters take within the story. Video game audiences don’t just witness the narrative, they give it form through their choices and actions. Other researchers have examined how interactivity in video games influences real world biases. The first part of this dissertation provides background information for these past studies. We expanded on this research with three studies of our own featuring race and gender bias. The studies reveal that in video games the experience of watching a character vs playing as a character greatly affects the character’s ability to influence audience biases. Just seeing a female or black character in a video game is a very different experience from playing as them and being able to control their actions. Furthermore, in video games this experience of play via character control produces a unique psychological phenomenon called embodied identification. Embodied identification represents how much a player feels they are physically and/or mentally immersed in a playable character. The level of embodied identification a player experiences directly effects the virtual character’s influence over the player. So, it plays an important role in influencing players and is the main focus of this dissertation. There is also an examination into how embodied identification effects players\u27 attitudes toward underrepresented people. The third of the three studies in this paper includes perhaps the most prolific expansion on past research by incorporating intersectionality into the study. This study allows researchers and developers to better understand how all aspects of a player character\u27s identity influence multiple societal biases. In this way, the study is able to look beyond a singular view of identity; only focusing on race or gender for example, to gain a more complete picture of video games\u27 ability to combat biases and promote tolerance in society

The end of stigma? Understanding the dynamics of legitimisation in the context of TV series consumption

This research contributes to prior work on stigmatisation by looking at stigmatisation and legitimisation as social processes in the context of TV series consumption. Using in-depth interviews, we show that the dynamics of legitimisation are complex and accompanied by the reproduction of existing stigmas and creation of new stigmas

Corporate Governance and the Shareholder: Asymmetry, Confidence, and Decision-Making

In the decade following the ten-plus percent stockmarket collapse of 2000, regulators enacted a myriad of regulations in response to increasing angst experienced by U.S. capital market retail investors. Systemic asymmetric disclosures have fractured investor confidence prompting many commentators to characterize the relationship between Wall Street and the investment community on main street as dire. Though copious works exist on the phenomenon of corporate behaviors, especially matters of shareholder welfare, weak boards, pervious governance mechanisms, and managerial excess, current literature has revealed a dearth in corporate governance praxis specific to the question and effects of asymmetric disseminations and its principal impact on the retail/noninstitutional accredited investor\u27s (NIAI) confidence and decision-making propensities. This phenomenological study is purposed to bridging the gap between the effects of governance disclosure and the confidence and decision-making inclinations of NIAIs. Conceptual frameworks of Akerlof\u27s information theory and Verstegen Ryan and Buchholtz\u27s trust/risk decision making model undergirded the study. A nonrandom purposive sampling method was used to select 21 NIAI informants. Analysis of interview data revealed epistemological patterns/themes confirming the deleterious effects of asymmetrical disseminations on participants\u27 investment decision-making and trust behaviors. Findings may help academicians, investors, policy makers, and practitioners better comprehend the phenomenon and possibly contribute to operating efficiencies in the capital markets. Proaction and greater assertiveness in the investor/activist community may provide an impetus for continued regulatory reforms, improved transparency, and a revitalization of public trust as positive social change outcomes

Tag based Bayesian latent class models for movies : economic theory reaches out to big data science

For the past 50 years, cultural economics has developed as an independent research specialism. At its core are the creative industries and the peculiar economics associated with them, central to which is a tension that arises from the notion that creative goods need to be experienced before an assessment can be made about the utility they deliver to the consumer. In this they differ from the standard private good that forms the basis of demand theory in economic textbooks, in which utility is known ex ante. Furthermore, creative goods are typically complex in composition and subject to heterogeneous and shifting consumer preferences. In response to this, models of linear optimization, rational addiction and Bayesian learning have been applied to better understand consumer decision- making, belief formation and revision. While valuable, these approaches do not lend themselves to forming verifiable hypothesis for the critical reason that they by-pass an essential aspect of creative products: namely, that of novelty. In contrast, computer sciences, and more specifically recommender theory, embrace creative products as a study object. Being items of online transactions, users of creative products share opinions on a massive scale and in doing so generate a flow of data driven research. Not limited by the multiple assumptions made in economic theory, data analysts deal with this type of commodity in a less constrained way, incorporating the variety of item characteristics, as well as their co-use by agents. They apply statistical techniques supporting big data, such as clustering, latent class analysis or singular value decomposition. This thesis is drawn from both disciplines, comparing models, methods and data sets. Based upon movie consumption, the work contrasts bottom-up versus top-down approaches, individual versus collective data, distance measures versus the utility-based comparisons. Rooted in Bayesian latent class models, a synthesis is formed, supported by the random utility theory and recommender algorithm methods. The Bayesian approach makes explicit the experience good nature of creative goods by formulating the prior uncertainty of users towards both movie features and preferences. The latent class method, thus, infers the heterogeneous aspect of preferences, while its dynamic variant- the latent Markov model - gets around one of the main paradoxes in studying creative products: how to analyse taste dynamics when confronted with a good that is novel at each decision point. Generated by mainly movie-user-rating and movie-user-tag triplets, collected from the Movielens recommender system and made available as open data for research by the GroupLens research team, this study of preference patterns formation for creative goods is drawn from individual level data

Use of stance control knee-ankle-foot orthoses : a review of the literature

The use of stance control orthotic knee joints are becoming increasingly popular as unlike locked knee-ankle-foot orthoses, these joints allow the limb to swing freely in swing phase while providing stance phase stability, thus aiming to promote a more physiological and energy efficient gait. It is of paramount importance that all aspects of this technology is monitored and evaluated as the demand for evidence based practice and cost effective rehabilitation increases. A robust and thorough literature review was conducted to retrieve all articles which evaluated the use of stance control orthotic knee joints. All relevant databases were searched, including The Knowledge Network, ProQuest, Web of Knowledge, RECAL Legacy, PubMed and Engineering Village. Papers were selected for review if they addressed the use and effectiveness of commercially available stance control orthotic knee joints and included participant(s) trialling the SCKAFO. A total of 11 publications were reviewed and the following questions were developed and answered according to the best available evidence: 1. The effect SCKAFO (stance control knee-ankle-foot orthoses) systems have on kinetic and kinematic gait parameters 2. The effect SCKAFO systems have on the temporal and spatial parameters of gait 3. The effect SCKAFO systems have on the cardiopulmonary and metabolic cost of walking. 4. The effect SCKAFO systems have on muscle power/generation 5. Patient’s perceptions/ compliance of SCKAFO systems Although current research is limited and lacks in methodological quality the evidence available does, on a whole, indicate a positive benefit in the use of SCKAFOs. This is with respect to increased knee flexion during swing phase resulting in sufficient ground clearance, decreased compensatory movements to facilitate swing phase clearance and improved temporal and spatial gait parameters. With the right methodological approach, the benefits of using a SCKAFO system can be evidenced and the research more effectively converted into clinical practice

The effect of prefabricated wrist-hand orthoses on performing activities of daily living

Wrist-hand orthoses (WHOs) are commonly prescribed to manage the functional deficit associated with the wrist as a result of rheumatoid changes. The common presentation of the wrist is one of flexion and radial deviation with ulnar deviation of the fingers. This wrist position Results in altered biomechanics compromising hand function during activities of daily living (ADL). A paucity of evidence exists which suggests that improvements in ADL with WHO use are very task specific. Using normal subjects, and thus in the absence of pain as a limiting factor, the impact of ten WHOs on performing five ADLs tasks was investigated. The tasks were selected to represent common grip patterns and tests were performed with and without WHOs by right-handed, females, aged 20-50 years over a ten week period. The time taken to complete each task was recorded and a wrist goniometer, elbow goniometer and a forearm torsiometer were used to measure joint motion. Results show that, although orthoses may restrict the motion required to perform a task, participants do not use the full range of motion which the orthoses permit. The altered wrist position measured may be attributable to a modified method of performing the task or to a necessary change in grip pattern, resulting in an increased time in task performance. The effect of WHO use on ADL is task specific and may initially impede function. This could have an effect on WHO compliance if there appears to be no immediate benefits. This orthotic effect may be related to restriction of wrist motion or an inability to achieve the necessary grip patterns due to the designs of the orthoses

The effect of prefabricated wrist-hand orthoses on grip strength

Prefabricated wrist-hand orthoses (WHOs) are commonly prescribed to manage the functional deficit and compromised grip strength as a result of rheumatoid changes. It is thought that an orthosis which improves wrist extension, reduces synovitis and increases the mechanical advantage of the flexor muscles will improve hand function. Previous studies report an initial reduction in grip strength with WHO use which may increase following prolonged use. Using normal subjects, and thus in the absence of pain as a limiting factor, the impact of ten WHOs on grip strength was measured using a Jamar dynamometer. Tests were performed with and without WHOs by right-handed, female subjects, aged 20-50 years over a ten week period. During each test, a wrist goniometer and a forearm torsiometer were used to measure wrist joint position when maximum grip strength was achieved. The majority of participants achieved maximum grip strength with no orthosis at 30° extension. All the orthoses reduced initial grip strength but surprisingly the restriction of wrist extension did not appear to contribute in a significant way to this. Reduction in grip must therefore also be attributable to WHO design characteristics or the quality of fit. The authors recognize the need for research into the long term effect of WHOs on grip strength. However if grip is initially adversely affected, patients may be unlikely to persevere with treatment thereby negating all therapeutic benefits. In studies investigating patient opinions on WHO use, it was a stable wrist rather than a stronger grip reported to have facilitated task performance. This may explain why orthoses that interfere with maximum grip strength can improve functional task performance. Therefore while it is important to measure grip strength, it is only one factor to be considered when evaluating the efficacy of WHOs

Whither Securities Regulation? Some Behavioral Observations Regarding Proposals for Its Future

Respected commentators have floated several proposals for startling reforms of America\u27s seventy-year-old securities regulation scheme. Many involve substantial deregulation with a view toward allowing issuers and investors to contract privately for desired levels of disclosure and fraud protection. The behavioral literature explored in this Article cautions that in a deregulated securities world it is exceedingly optimistic to expect issuers voluntarily to disclose optimal levels of information, securities intermediaries such as stock exchanges and stockbrokers to appropriately consider the interests of investors, or investors to be able to bargain efficiently for fraud protection