Search

Habit formation is an important part of behavior change interventions: to ensure an intervention has long-term effects, the new behavior has to turn into a habit and become automatic. Smartphone apps could help with this process by supporting habit formation. To better understand how, we conducted a 4-week study exploring the influence of different types of cues and positive reinforcement on habit formation and reviewed the functionality of 115 habit formation apps. We discovered that relying on reminders supported repetition but hindered habit development, while the use of event-based cues led to increased automaticity; positive reinforcement was ineffective. The functionality review revealed that existing apps focus on self-tracking and reminders, and do not support event-based cues. We argue that apps, and technology-based interventions in general, have the potential to provide real habit support, and present design guidelines for interventions that could support habit formation through contextual cues and implementation intentions.

Games are normally considered to be "fun", though recently there is growing interest in how gameplay can promote empathy and encourage reflection through "serious experience". However, when looking beyond enjoyment, it is not clear how to actually evaluate serious experience. We present an evaluation of four games that were submitted to a student game design competition; the competition challenged teams to design a game that inspired curiosity around human error and blame culture within the context of healthcare. The entries were judged by a panel of six experts and subjected to a round of play testing by twelve participants. Methods included gameplay observation, questionnaires, post-play interviews and follow-up email questions. We discuss the utility of these methods, with particular emphasis on how they enabled a consideration of the immediate and longer term impact of serious experience on players.

Technology not only brings benefits such as flexible working practices but can also have negative stressful consequences such as increasing email overload and the blurring of work-home boundaries. We report on an exploratory study that extends the current understanding of email usage by investigating how different professions at a university manage work and personal emails using different devices and how this impacts their work-home boundary management. Our findings lead us to identify two user groups: those with permeable boundaries (primarily academics) and those who have more rigid ones (primarily professional services employees) and that there are differences in when, where and how they manage their work and personal emails. In particular we find that some participants use micro-boundary strategies to manage transitions between work and personal life. Based on these novel findings we propose improvements of email software design to facilitate effective email, work-home boundary management, and support micro-boundary practices.

This paper reports the results of a study which investigated whether there is a common understanding of the terms plagiarism and collusion between students and staff. Participants made judgements on scenarios describing student behaviour in assessments. The results suggest that although plagiarism is well understood, the same can not be said of collusion. Both staff and students feel that collusion is much more acceptable than plagiarism because some learning is taking place. It appears that there is no consensus on the boundary between collaborative behaviour and collusion.

Interactive medical devices such as infusion pumps, monitors and diagnostic devices help save lives. However, they are also safety critical in that they may fail in use and patient harm or death ensue. It is not just that the software and hardware should meet their specification. The design should help ensure users do not make mistakes. Safety factors become more important as medical devices become mobile and are used by patients as part of their everyday life rather than by trained professionals in well-defined hospital environments. Regulators are increasingly taking home-use seriously as a result of device recalls due to devices that have caused patient harm. We give insights from the research on the CHI+MED project (www.chi-med.ac.uk). It has focussed on understanding how the design of interactive medical devices can support safety. CHI+MED also developed practical tools and guidance that we review.

This chapter presents the theory of the Core Elements of the Gaming Experience (CEGE). The CEGE are the necessary but not sufficient conditions to provide a positive experience while playing video-games. This theory, formulated using qualitative methods, is presented with the aim of studying the gaming experience objectively. The theory is abstracted using a model and implemented in questionnaire. This chapter discusses the formulation of the theory, introduces the model, and shows the use of the questionnaire in an experiment to differentiate between two different experiences.

Previous research investigating motivations in citizen science have focused mostly on environmental citizen science projects. In this paper we focus specifically on citizen psychology projects, which we term 'citizen psych-science'. We argue that citizen psych-science differs from typical citizen science projects because volunteers are asked to contribute personal data. Furthermore we argue that the personal nature of such contributions can have unanticipated consequences on volunteer's motivations to contribute and their experiences of participating in the project. Exploring these issues in more detail, we describe four research studies that we conducted with Errordiary, a citizen psych-science project where volunteers tweet about their everyday experiences of human error. These studies included: (1) an interview study to explore motivations of 8 Errordiary volunteers, and (2) one workshop and two focus groups, to explore the potential of attracting new communities to the project. One of our main findings is that the risks associated with sharing errors on Errordiary, such as negative perceptions from others, being viewed as incompetent at your workplace, may counteract a person’s general good will to help researchers. We suggest several ways that researchers can help citizen psych-science volunteers feel like they are in a safe space to contribute their experiences towards research. These include clearly communicating the purpose of their research, allowing the use of pseudonyms, explaining how data is protected, and ensuring that proper monitoring controls are in place.

More and more researchers want to use games as a way of engaging the general public in their research; however game development takes time and requires significant programming knowledge. The goal of RedWire is to enable researchers to create games faster without starting from scratch each time. By encouraging re-mixing and mash-ups, we hope to provide users with an easy way of sharing games and creating variations of games.

Challenge is considered to be one of the key components of game-play, where game designers face the tricky task of getting the balance right so that game-play is neither too easy nor too difficult. Through attempting in-game challenges, players experience cycles of breakdown and breakthrough, where breakthroughs involve moments of insight in which learning occurs. However, little attention has been given to how players actually overcome challenges to progress during game-play. Across two studies, we explore the ways in which players attempt to achieve breakthroughs in relation to single-player and co-located multiplayer games. We identified a number of strategies that are used by players, which illustrate how learning occurs during play. For instance, while "Experiment" involves forming an informal hypothesis, "Trial & error" occurs when the player tries to find out what, if anything, will happen when they carry out an action. These strategies are considered in relation to supporting player progress and engaging game-play when designing commercial and educational games.

The dramatic rise in the use of social network sites (SNS) has resulted in a number of users feeling stressed about the extent of their personal use. Previous work has established that daily retrospective estimations of SNS use and access to RescueTime not only improve accuracy of estimations but also reduce perceived stress. The present study aimed to extend this by also exploring the influence of prospective estimations on stress and perceived time management. However, the study was thwarted by incredibly low engagement with RescueTime and consequently, no improvement in estimation accuracy and no reduction in stress. This indicates substantial individual differences in engagement and a requirement for external sources of motivation for using personal informatics, beyond the tasks of the study.

In 2004, the National Patient Safety Agency (NPSA) released a safety alert relating to the management and use of infusion devices in England and Wales. The alert called for the standardisation of infusion devices and a consideration of using centralised equipment systems to manage device storage. There has also been growing interest in smart-pump technology, such as dose error reduction software (DERS) as a way to reduce IV medication errors. However, questions remain about the progress that has been made towards infusion device standardisation and the adoption of DERS. In this article, the authors report the results of a survey investigating the extent to which the standardisation of infusion devices has occurred in the last 10 years and centralised equipment libraries are being used in practice, as well as the prevalence of DERS use within the UK. Findings indicate that while reported standardisation levels are high, use of centralised equipment libraries remains low, as does DERS usage.

Many people can now bring the office home in the evening and work on a laptop computer while watching television. We conducted a lab-study to investigate the impact that this media multitasking habit has on stress and our ability to stay engaged with the content of a television show. Participants were required to complete a stressful mental arithmetic task, designed to simulate a demanding work-related activity, while watching a segment of a television documentary. To reflect the different ways that people can media multitask, participants were asked either to perform the work task continuously (concurrent multitasking), or during bursts (sequential multitasking). Results show that working on the stressful task was stressful ' it did not matter whether the television was on or not, nor did it matter how the tasks were interleaved. There was some evidence that sequentially interleaving tasks allowed participants to maintain their engagement with the television show. Overall though the results of this preliminary study suggest that if people want to relax and become engrossed in a television show they should avoid working on a secondary device at the same time.

When searching a display, users sometimes know what the target is but sometimes do not. It has generally been assumed that for this latter case people must engage in a deeper semantic evaluation of items during the search process. This idea is central to Information Foraging theory. But do people actually spend longer assessing items when engaged in a semantically demanding search task' We investigate this by having participants locate target items in 16-item menus. Participants were either told exactly what to look for (known-item search) or they were told the category that the target belonged to (semantic search). Participants were faster and more accurate at known-item searches. Eye-movement data show that this was because participants were more likely to skip over items when performing known-item searches. Contrary to expectation, we found limited empirical evidence to support the idea that deeper semantic evaluations of items lead to longer gaze durations (this occurred only when items were arranged very close together). This finding is important because it reveals how people adopt different eye gaze strategies depending on the kind of search activity they are engaged in.

Digital games are rich learning environments that require players to engage with challenging situations in order to progress. Recent research indicates that game-play involves overcoming breakdowns and achieving breakthroughs in relation to player action, understanding and involvement. In particular, breakthroughs involve moments of insight where learning occurs which, in turn, can help increase involvement. However, little is known about how players actually achieve breakthroughs. We applied the breakdown/breakthrough “lens” to explore how players attempt to achieve breakthroughs in relation to two single player games. We identified a finite number of strategies that illustrate how players learn in games. These strategies are considered in relation to producing playable and engaging games.

Despite the fact that a third of all cases of unintentional medication non-adherence are caused by simple forgetfulness, the majority of interventions neglect this issue. Even though patients have access to smartphone applications ("apps") designed to help them remember medication, neither their quality nor effectiveness has been evaluated yet. We report the findings of a functionality review of 229 medication reminder apps and a thematic analysis of their 1,012 user reviews. Our research highlights the gap between the theory and practice: while the literature shows that many medication regimens are habitual in nature and the presence of daily routines supports remembering, existing apps rely on timer-based reminders. To address this disparity, we present design requirements for building medication reminders that support the routine aspect of medication-taking and its individual nature, and demonstrate how they could be implemented to move from passive alerts to a smarter memory and routine assistant.

In most online citizen science projects, a large proportion of participants contribute in small quantities. To investigate how low contributors differ from committed volunteers, we distributed a survey to members of the Old Weather project, followed by interviews with respondents selected according to a range of contribution levels. The studies reveal a complex relationship between motivations and contribution. Whilst high contributors were deeply engaged by social or competitive features, low contributors described a solitary experience of 'dabbling' in projects for short periods. Since the majority of participants exhibit this small-scale contribution pattern, there is great potential value in designing interfaces to tempt lone workers to complete 'just another page', or to lure early drop-outs back into participation. This includes breaking the work into components which can be tackled without a major commitment of time and effort, and providing feedback on the quality and value of these contributions.

 Abstract— Immersion is a widely valued experience when playing digital games however it is only one component of the gaming experience. In this chapter, we review our specific approach to immersion in relation to other concepts that are used to describe gaming experiences. These include: concepts that are not specific to games such as flow and attention; generic conceptualizations of the gaming experience of which immersion may form part, such as incorporation; and specific concepts around immersion, engagement and involvement such as presence and other formulations of immersion. To illustrate the sorts of studies being done in this area, we describe one experiment in detail which aims to position immersion in relation to presence. The chapter makes three contributions: a clear formulation of immersion as one aspect of gaming experience; an overview of the state-of-the-art of gaming experience research; and a demonstration of the possibility to achieve an empirically founded understanding of these rich, subjective experiences.

Recent advances in mobile technology have had many positive effects on the ways in which people can combine work and home life. For example, having remote access enables people to work from home, or work flexible hours that fit around caring responsibilities. They also support communication with colleagues and family members, and enable digital hobbies. However, the resulting 'always-online' culture can undermine work-home boundaries and cause stress to those who feel under pressure to respond immediately to digital notifications. This workshop will explore how a socio-technical perspective, which views boundaries as being constituted by everyday socio-technical practices, can inform the design of technologies that help maintain boundaries between work and home life.

Gamification is increasingly implemented in citizen science projects as a means of motivating and sustaining participation. In a survey and subsequent interviews we explored the appeal of gamification for participants in the Old Weather project, and its impact upon data quality. We found that the same competitive mechanisms which some volunteers found rewarding and motivating were either ignored by other participants, or contributed to a decision to discontinue participation. We also identified an opportunity to use gamification to exploit the narrative appeal of a project such as Old Weather. In contrast to previous citizen science research, much of which focuses on how to support the most active or prolific contributors, we offer new design recommendations which recognise varying levels of engagement with a project.

The phrase "lifelong learning" places emphasis on the fact that learning continues beyond the classroom and formal educational environments, though it is often supported by training within the workplace. Continued professional development is particularly important within the context of healthcare, where technology is constantly evolving and errors run the risk of causing serious harm to patients. This paper considers the case of infusion device training within UK hospitals. Interviews were carried out with staff involved in medical device training and management across seven National Health Service trusts. The analysis indicates the range of training provided by different institutions and highlights important issues that influence how users develop their understanding of these devices. Further, the research indicates that while there is an increasing interest in e-learning as a way to overcome some of the challenges trainers face in relation to time and resources, there are also significant concerns which need to be addressed when considering this approach.

Interruptions are disruptive because they take time to recover from, in the form of a resumption lag, and lead to an increase in the likelihood of errors being made. Despite an abundance of work investigating the effect of interruptions on routine task performance, little is known about whether there is a link between how quickly a task is resumed following an interruption (i.e., the duration of the postinterruption resumption lag) and the likelihood that an error is made. Two experiments are reported in which participants were interrupted by a cognitively demanding secondary mental arithmetic task while working on a routine sequential data-entry task. In Experiment 1 the time-cost of making an error on the primary task was varied between conditions. When errors were associated with a high time-cost penalty, participants made fewer errors and resumed the primary task more slowly than when errors were associated with a low time-cost penalty. In Experiment 2 participants were prohibited from resuming the primary task quickly by a 10-s system lockout period following the completion of the interrupting task. This lockout period led to a significant reduction in resumption errors because the lockout prohibited fast, inaccurate task resumptions. Taken together, our results suggest that longer resumption lags following an interruption are beneficial in terms of reducing the likelihood of errors being made. We discuss the practical implications of how systems might be designed to encourage more reflective task resumption behavior in situations where interruptions are commonplace. (PsycINFO Database Record (c) 2013 APA, all rights reserved).

Advances in technology, in particular the widespread use of mobile devices, have changed work practices and transformed our everyday lives. However, as well as facilitating new ways for combining work and personal life, these new technologies can also blur the boundary between the two domains. In recent years tablets have become popular, first as leisure devices, and lately as business tools helping people to stay connected with work anywhere, anytime. Through an online questionnaire supported by a qualitative study, we investigated why, how, and where office workers use tablets and what impact those devices may have on work-life balance. The results show that, while useful for both home and work tasks, tablets have the potential to blur the boundary between work and personal life by encouraging and enabling people to complete work tasks during home time and vice versa. This could have negative impacts on work-life balance.

Number entry is a common task in many domains. In safety-critical environments such as air traffic control or on hospital wards, incorrect number entry can have serious harmful consequences. Research has investigated how interface designs can help prevent users from making number entry errors. In this paper, we present an experimental evaluation of two possible interface designs aimed at helping users detect number entry errors using the idea of a checksum: an additional (redundant) number that is related to the to-be-entered numbers in such a way that it is sufficient to verify the correctness of the checksum, as opposed to checking each of the entered numbers. The first interface requires users to check their own work with the help of the checksum; the second requires the user to enter the checksum along with the other numbers so that the system can do the checking. In each case, two numbers needed to be entered, while the third number served as a checksum. With the first interface, users caught only 36% of their errors. The second interface resulted in all errors being caught, but the need to enter the checksum increased entry time by 46%. When participants were allowed to choose between the two interfaces, they chose the second interface in only 12% of the cases. Although these results cannot be generalized to other specific contexts, the results illustrate the strengths and weaknesses of each way of using checksums to catch number entry errors. Hence our study can serve as a starting point for efforts to improve each method.

Increasingly, games are being incorporated into online citizen science (CS) projects as a way of crowdsourcing data; yet the influence of gamification on volunteer motivations and engagement in CS projects is still unknown. In an interview study with 8 CS volunteers (4 from Foldit, 4 from Eyewire), we found that game elements and communication tools are not necessary for attracting new volunteers to a project; however they may help to sustain engagement over time, by allowing volunteers to participate in a range of social interactions and through enabling meaningful recognition of achievements.

Many devices require programming with values that can only be obtained by consulting an artifact. For example when preparing an unfamiliar microwave meal, the heating instructions should be consulted in order to program the correct values into the microwave oven. In this paper we consider how the presentation of programming values can impact on the likelihood of making an error. Findings from a medical device programming experiment demonstrate the hidden complexities of artifact design. Good design should encourage users to adopt programming strategies that are less prone to error. Artifact layouts need to be designed with the task in mind, especially when multiple devices require programming quickly.

Objective: We studied the patterns of digits and numbers used when programming infusion pumps with the aim of informing the design of number entry interfaces. Background: Number entry systems on medical devices are designed with little thought given to the numbers that will be entered. In other fields, text and number entry interfaces are designed specifically for the task that they will be used for. Doing so allows for faster and more accurate interaction. Method: In Study 1, logs were taken from infusion pumps used in a hospital. Information about the numbers being typed was extracted. For Study 2, three common number entry interfaces were evaluated in light of these results to determine which were best suited to the task of programming infusions. Results: There are clear patterns in the numbers being used in hospitals. The digit 0 is used far more frequently than any other digit. The numbers 1,000, 100, and 50 are used in nearly half of all infusions. Study 2 demonstrates that interfaces are not optimized for entering such data. Conclusion: Changes could be made to the design of the number entry interface on infusion pumps, leading to a reduction in the number of key presses necessary to program a device. We offer a set of four heuristics to guide the design of number entry interfaces on infusion devices. Application: Improving the design of the number entry interface of medical devices, such as infusion pumps, would lead to improved efficiency and a reduction in the likelihood of errors.

Many tasks with interfaces require entering data accurately, for example, entering patient data in an electronic records system or programming infusion pumps. However, human error is inevitable. Paradoxically, results from cognitive psychology suggest that representing information in a poorer quality format increases the likelihood of memorising the information accurately. This is explained by the dual system account of cognition where slower, more effortful but more accurate thinking is invoked via the poorer quality representation. We present two studies where we transfer these results to the domain of data- entry and show that poorer quality format of to-be-copied information leads to increased accuracy in transcription tasks. Moreover, this is not a consequence of the typical speed-accuracy tradeoffs. The results of our novel approach have implications for the design of data-entry tasks in domains such as healthcare.

A variety of medical procedures require arithmetic calculations to be performed. These calculations can be complex and induce errors that can have serious consequences on the ward. In this paper, we consider whether a graphical representation might make these calculations easier. The results of a laboratory experiment are reported in which participants were asked to solve a number of infusion parameter problems that were represented either graphically or textually. Results show that participants were faster but no more accurate in solving graphical problems than they were textual problems. We discuss the need for situated work to be conducted that builds on these initial findings to determine whether the advantages of graphical representations transfer to actual workplace settings.

Part 1: Long and Short Papers; International audience; Number entry is ubiquitous and there are several ways a number entry interface can be designed. Until recently, research has been focused mainly on one type of number entry interface: the numeric keypad. Various factors such as the range of values, and the space available for the design allows for several alternative interfaces to be used for number entry. In the design of medical devices such as those used for controlled drug delivery, accurate and timely entry of numbers are required in order to reduce any risk of harm to patients. This paper reviews five number entry interface styles and reports the result of an experiment conducted to evaluate the performance differences of the interfaces based on numbers used in infusion therapy in a hospital. The result shows a significant effect of interface style on speed and accuracy.

When routine tasks are interrupted, erroneous slips become more likely. Expertise is no defence against these kinds of errors but visual hints can alleviate such negative effects in computer interfaces. We compared previous-action cueing with next-action cueing, measuring the effects on error rate, and found that both approaches were statistically equivalent in helping to mitigate the disruptive effects of interruptions. Following an interruption, a cue should be displayed highlighting the last action performed by the user -- a trivial operation for software applications.

In the English language, the letters of the alphabet do not occur with equal frequency. Some letters occur far more often than others, for example the letter e occurs more frequently than z. In this paper we show that as with letters, digits too suffer from unequal distributions in some situations. Here we show that the most common digits being used when programming infusion pumps to administer drugs to patients are 0, 1, 2 and 5. The digit 9 is also frequently used to set an infusion to run at the maximum rate possible. With this information, we evaluate three current forms of infusion pump input with regards to the digits that are actually being programmed into the machines. We argue that the current number interface designs used in medical devices should take into account these findings in order to produce interfaces that are both more suitable for the task, and less error prone in use.

Previous research into the experience of videogames has shown the importance of the role of challenge in producing a good experience. However, defining exactly which challenges are important and which aspects of gaming experience are affected is largely under-explored. In this paper, we investigate if altering the level of challenge in a videogame influences people's experience of immersion. Our first study demonstrates that simply increasing the physical demands of the game by requiring gamers to interact more with the game does not result in increased immersion. In a further two studies, we use time pressure to make games more physically and cognitively challenging. We find that the addition of time pressure increases immersion as predicted. We argue that the level of challenge experienced is an interaction between the level of expertise of the gamer and the cognitive challenge encompassed within the game.

People are prone to making more errors when multitasking. Thus in safety-critical environments, it is often considered safer to perform tasks sequentially. Here we explore how the cost of accessing information affects the way people choose to interleave. An empirical study based on a medical scenario was conducted. Participants had to program infusion pump devices using information from a prescription form. The physical and mental effort involved in accessing information was manipulated. This was achieved by varying the physical distance between the prescription form and the devices. We demonstrate that by increasing information access cost, individuals are less likely to omit a required task step. This is because they adopt a more memory-intensive strategy, which encourages interleaving at natural boundaries, i.e., after completing the programming of one of the pumps. Interleaving during programming can result in task steps being forgotten.

Existing applications tend to highlight tasks that people should be doing at any given time based on the parameters of urgency (e.g. deadline), assigned priority and reminders. Our field studies demonstrate that people consider existing applications as inadequate to flexibly adapt to current changes in other essential factors, including, task size, complexity and interdependency and the unexpected situations that people face over time. Another key challenge facing busy people is that there is no mechanism that can monitor their work habits and match their tasks with their time constraints. Grounded in our data, we propose important requirements for tools that support users in managing tasks and assessing their schedules.

Within the CHI community there has been sustained interest in interruptions and multitasking behaviour. Research in the area falls into two broad categories: the micro world of perception and cognition; and the macro world of organisations, systems and long-term planning. Although both kinds of research have generated insights into behaviour, the data generated by the two kinds of research have been effectively incommensurable. Designing safer and more efficient interactions in interrupted and multitasking environments requires that researchers in the area attempt to bridge the gap between these worlds. This SIG aims to stimulate discussion of the tools and methods we need as a community in order to further our understanding of interruptions and multitasking.

People are prone to errors in many aspects of life, including when entering numbers. The effects of these errors can be disastrous, for example when an incorrect number is entered when programming a medical infusion pump or when entering financial information into a system. Designing better systems may help to prevent these errors however, in order to do this we need to understand far more about the types of errors being made, and their causes. Unfortunately, there are very few documented examples of number entry errors and thus many of the studies conducted so far rely upon modelled, not real world data. This paper reports a study that was designed to elicit number entry errors and the subsequent process of creating a taxonomy of errors from the information gathered. A total of 345 errors were gathered. A method for classifying the errors using 13 codes is proposed --- this is a significantly higher figure than previously suggested, showing that currently we underestimate the true variety of such errors. These codes are then organised into a taxonomy similar to that of Zhang et al (2004). We show how this taxonomy can be used to guide future research into number entry errors by suggesting experimental conditions needed to provoke certain errors. The taxonomy may also be used during the initial stages of design to help the designer understand the categories of errors that users are most likely to make and thus design accordingly.

Part 1: Long and Short Papers; International audience; A significant amount of interaction involves number entry. The purpose of any number entry interface is to accurately select or set a numeric value. There are two main styles of number entry interfaces found on medical devices: serial interfaces like the ubiquitous 12-key numeric keypad, and incremental interfaces that use a knob or a pair of keys to increase or decrease numbers. We report an experiment that investigates the effect of interface design on error detection in number entry. The initial findings show that the incremental interface produces more accurate inputs than the serial interface, and the magnitude of errors suggests that the incremental interface could reduce the death rate relative to the numeric keypad.

Many user-centred studies of digital libraries (DLs) include a think-aloud element and are usually conducted with the purpose of identifying usability issues related to the DLs used or understanding aspects of users' information behaviour. However, few of these studies present detailed accounts of how their think-aloud data was collected and analysed or reflect on this process. In this paper, we discuss and reflect on the decisions made when planning and conducting a think-aloud study of lawyers' interactive information behaviour. Our discussion is framed by Blandford et al.'s PRET A Rapporter ('ready to report') framework - a framework that can be used to plan, conduct and describe user-centred studies of DL use from an information work perspective.

While frustrating and innocuous in many settings, errors can have disastrous consequences for the use of safety critical systems and medical devices. This work-in-progress investigates the effectiveness of an enforced lockout period for reducing errors in a routine task. During the lockout period the user can look at, but not interact with the device interface for a period of 10 seconds before they resume the task after an interruption. Results show that this lockout period can reduce sequence errors by up to 64%. Identifying ways to reduce the disruptiveness of interruptions is important for HCI research given that many devices are now used in settings where interruptions are commonplace.

In this paper we describe research being conducted to investigate the experience of computer game immersion, in particular the component "real world dissociation".

In this chapter we discuss a number of recent studies that demonstrate the use of rational analysis (Anderson, 1990) and cognitive modelling methods to understand complex interactive behaviour involved in three tasks: (1) icon search, (2) graph reading, and (3) information retrieval on the World Wide Web (WWW). We describe the underlying theoretical assumptions of rational analysis and the adaptive control of thought-rational (ACT-R) cognitive architecture (Anderson & Lebiere, 1998), a theory of cognition that incorporates rational analysis in its mechanisms for learning and decision making. In presenting these studies we aim to show how such methods can be combined with eye movement data to provide detailed, highly constrained accounts of user performance that are grounded in psychological theory. We argue that the theoretical and technological developments that underpin these methods are now at a stage that the approach can be more broadly applied to other areas of Web use.

Information behavior (IB) research involves examining how people look for and use information, often with the sole purpose of gaining insights into the behavior displayed. However, it is also possible to examine IB with the purpose of using the insights gained to design new tools or improve the design of existing tools to support information seeking and use. This approach is advocated by David Ellis who, over two decades ago, presented a model of information seeking behaviors and made suggestions for how electronic tools might be designed to support these behaviors. Ellis also recognized that IBs might be used as the basis for evaluating as well as designing electronic resources. In this article, we present the IB evaluation methods. These two novel methods, based on an extension of Ellis's model, use the empirically observed IBs of lawyers as a framework for structuring user-centered evaluations of the functionality and usability of electronic resources. In this article, we present the IB methods and illustrate their use through the discussion of two examples. We also discuss benefits and limitations, grounded in specific features of the methods.

With fast changing technologies and related human interaction issues, there is an increased need for timely evaluation of systems with distributed users in varying contexts (Pace, 2004). This has led to the increased use of questionnaires, in-depth interviews and focus groups in commercial usability and academic research contexts. Questionnaires are usually paper based or delivered online and consist of a set of questions which all participants are asked to complete. Once the questionnaire has been created, it can be delivered to a large number of participants with little effort. However, a large number of participants also means a large amount of data needing to be coded and analysed. Interviews, on the other hand, are usually conducted on a one-to-one basis. They require a large amount of the investigator’s time during the interviews and also for transcribing and coding the data. Focus groups usually consist of one investigator and a number of participants in any one session. Although the views of any one participant cannot be probed to same degree as in an interview, the discussions that are facilitated within the groups often result in useful data in a shorter space of time than that required by one-to-one interviews. \ud All too often, however, researchers eager to identify usability problems quickly throw together a questionnaire, interview or focus group that, when analysed, produces very little of interest. What is often lacking is an understanding of how the research method design fits with the research questions (Creswell, 2003) and how to appropriately utilise these different approaches for specific HCI needs. The methods described in this chapter can be useful when used alone but are most useful when used together with other methods. Creswell (2003) provides a comprehensive analysis of the different quantitative and qualitative methods and howthey can be mixed and matched for overall better quality research. Depending on what we are investigating, sometimes it is useful to start with a questionnaire and then, for example, follow up some specific points with an experiment, or a series of interviews, in order to fully explore some aspect of the phenomenon under study. \ud This chapter describes how to choose between and design questionnaires, interviews and focus group studies and using two examples illustrates the advantages of combining a number of approaches when conducting HCI research.

Human-Computer Interaction draws on the fields of computer science, psychology, cognitive science, and organisational and social sciences in order to understand how people use and experience interactive technology. Until now, researchers have been forced to return to the individual subjects to learn about research methods and how to adapt them to the particular challenges of HCI. This book provides a single resource through which a range of commonly used research methods in HCI are introduced. Chapters are authored by internationally leading HCI researchers who use examples from their own work to illustrate how the methods apply in an HCI context. Each chapter also contains key references to help researchers find out more about each method as it has been used in HCI. Topics covered include experimental design, use of eyetracking, qualitative research methods, cognitive modelling, how to develop new methodologies and writing up your research.