The Usability and Learnability of Pen/Tablet Mode Inferencing

The inferred mode protocol uses contextual reasoning and local mediators to eliminate the need to access specic modes to perform draw, select, move and delete operations in a sketch interface. This thesis describe an observational experiment to understand the learn- ability, user preference and frequency of use of mode inferencing in a sketch appli- cation. Novel methodology is presented to study both quantitative and long term qualitative facets of mode inferencing. The experiment demonstrated that participants instructed in the in- terface features enjoyed fluid transitions between modes. As well, interaction techniques were not self-revealing: Participants who were not instructed in interaction techniques took longer to learn about inferred mode features and were more negative about the interaction techniques. Over multiple sketching sessions, as users develop expertise with the system, they combine inferred mode techniques to speed interaction, and frequently make use of scratch space on the display to retrain themselves and to tune their behaviors. Lastly, post- task interviews outline impediments to discoverability and how performance is affected by negative perceptions around computational intelligence. The results of this work inform the design of sketch interface techniques that incorporate noncommand features

Barehand Mode Switching in Touch and Mid-Air Interfaces

Raskin defines a mode as a distinct setting within an interface where the same user input will produce results different to those it would produce in other settings. Most interfaces have multiple modes in which input is mapped to different actions, and, mode-switching is simply the transition from one mode to another. In touch interfaces, the current mode can change how a single touch is interpreted: for example, it could draw a line, pan the canvas, select a shape, or enter a command. In Virtual Reality (VR), a hand gesture-based 3D modelling application may have different modes for object creation, selection, and transformation. Depending on the mode, the movement of the hand is interpreted differently. However, one of the crucial factors determining the effectiveness of an interface is user productivity. Mode-switching time of different input techniques, either in a touch interface or in a mid-air interface, affects user productivity. Moreover, when touch and mid-air interfaces like VR are combined, making informed decisions pertaining to the mode assignment gets even more complicated. This thesis provides an empirical investigation to characterize the mode switching phenomenon in barehand touch-based and mid-air interfaces. It explores the potential of using these input spaces together for a productivity application in VR. And, it concludes with a step towards defining and evaluating the multi-faceted mode concept, its characteristics and its utility, when designing user interfaces more generally

The WOZ Recognizer: A Tool For Understanding User Perceptions of Sketch-Based Interfaces

Sketch recognition has the potential to be an important input method for computers in the coming years; however, designing and building an accurate and sophisticated sketch recognition system is a time consuming and daunting task. Since sketch recognition is still at a level where mistakes are common, it is important to understand how users perceive and tolerate recognition errors and other user interface elements with these imperfect systems. A problem in performing this type of research is that we cannot easily control aspects of recognition in order to rigorously study the systems. We performed a study examining user perceptions of three pen-based systems for creating logic gate diagrams: a sketch-based interface, a WIMP-based interface, and a hybrid interface that combined elements of sketching and WIMP. We found that users preferred the sketch-based interface and we identified important criteria for pen-based application design. This work exposed the issue of studying recognition systems without fine-grained control over accuracy, recognition mode, and other recognizer properties. In order to solve this problem, we developed a Wizard of Oz sketch recognition tool, the WOZ Recognizer, that supports controlled symbol and position accuracy and batch and streaming recognition modes for a variety of sketching domains. We present the design of the WOZ Recognizer, modeling recognition domains using graphs, symbol alphabets, and grammars; and discuss the types of recognition errors we included in its design. Further, we discuss how the WOZ Recognizer simulates sketch recognition, controlling the WOZ Recognizer, and how users interact with it. In addition, we present an evaluative user study of the WOZ Recognizer and the lessons we learned. We have used the WOZ Recognizer to perform two user studies examining user perceptions of sketch recognition; both studies focused on mathematical sketching. In the first study, we examined whether users prefer recognition feedback now (real-time recognition) or later (batch recognition) in relation to different recognition accuracies and sketch complexities. We found that participants displayed a preference for real-time recognition in some situations (multiple expressions, low accuracy), but no statistical preference in others. In our second study, we examined whether users displayed a greater tolerance for recognition errors when they used mathematical sketching applications they found interesting or useful compared to applications they found less interesting. Participants felt they had a greater tolerance for the applications they preferred, although our statistical analysis did not positively support this. In addition to the research already performed, we propose several avenues for future research into user perceptions of sketch recognition that we believe will be of value to sketch recognizer researchers and application designers

Patient-Centred Culturally-Aware Design Approach for e-Health Acceptance

The importance of information and communication technology in healthcare has recently grown to an unprecedented dimension as more people are empowered by technology to participate more actively in their healthcare processes. New online applications for accessing healthcare information and for self-diagnosis have become increasingly available to diverse patient groups of different languages, educational backgrounds, and cultural orientations. However, the design of these applications typically follows Western cultural orientations. This approach has created a gap, which makes it difficult for users, who use the systems within their own cultural contexts, to derive maximum benefits from such use. As a result, the gap impedes the uptake, market success, and effective adoption of these e-Health applications in various cultural contexts. Moreover, as healthcare organisations increasingly seek to interact with patients, often in real-time, through enhanced web-based services, patient experiences often become tied to a largely ‘Western-driven’ style of patient interfaces, interaction, and look and feel that negatively impact the overall acceptance of these services across different cultures. This poses a tremendous challenge to technology adoption, in particular with regard to how to design culturally-aware and patientcentred e-Health applications that reflect the cultural diversity of today’s users and meaningfully empower them to better utilise such tools to enhance their day-to-day life. This research proposes to investigate the impact of a patient-centred culturally-aware design approach on the patient acceptance of e-Health web-based services, in particular, how e-Health web-based applications can be designed in a way that maximises their usability and ‘fits’ them into the cultural fabrics of individuals in different cultural contexts. To address this challenge, this research work examined existing literature in the fields of culture, technology acceptance and HCI, and identified relevant constructs that were used to develop a culturally-aware technology acceptance model for electronic health. Subsequently, the model provided a means for understanding the influence of different factors affecting patient acceptance and usage which were used as a foundation to inform the design of the Patient-Centred Culturally-aware e-Health Design Approach (PCCeDA) framework for e-Health web-based services developments. The novelty in PCCeDA is the notion of cultural awareness, which allows systems to personalise themselves according to a patient’s cultural profile while adhering to usability principles. As a result, the interface and contents presented to a patient are both dynamically tailored to better suit that patient’s cultural preferences, thereby increasing patient adoption. Based on PCCeDA, a proof of concept prototype called i-Diagnose was developed primarily to assess the validity of the framework and to answer the central questions of this research study. Evaluation results show that a patient-centred culturally-aware design approach enhances the effectiveness, usefulness and patient acceptance of e-Health web-based services in different cultural contexts. The main contributions of this work include: (i) a culturally sensitive technology acceptance model for e-Health (‘e-HTAM’) where both technology acceptance model and cultural dimensions are integrated to develop the e-HTAM model. The model highlighted various issues that need to be taken into consideration when designing patient-centred culturally-aware e-Health Design Approach applications; and (ii) a patient-centred Culturally-aware e-Health Design Approach framework that allows systems to personalise both the patient interface and the contents provided to a patient to better suit that patient’s cultural background. The research also includes a number of other minor contributions such as: (i) an approach for solving the static nature of Hofstede’s dimensions’ indexation, through the use of cultural parameters to dynamically model users’ cultural states, (ii) the introduction of personalisation based on cultural factors into the e-Health web-based services domain, and (iii) shed light on the electronic health acceptance state in the UAE as compared to the UK

NASA RECON: Course Development, Administration, and Evaluation

The R and D activities addressing the development, administration, and evaluation of a set of transportable, college-level courses to educate science and engineering students in the effective use of automated scientific and technical information storage and retrieval systems, and, in particular, in the use of the NASA RECON system, are discussed. The long-range scope and objectives of these contracted activities are overviewed and the progress which has been made toward these objectives during FY 1983-1984 is highlighted. In addition, the results of a survey of 237 colleges and universities addressing course needs are presented

Proceedings of the 19th Sound and Music Computing Conference

Proceedings of the 19th Sound and Music Computing Conference - June 5-12, 2022 - Saint-Étienne (France). https://smc22.grame.f