Eve Hoggan | University of Helsinki (original) (raw)

Papers by Eve Hoggan

Abstract Touchscreens are becoming more and more popular, especially in mobile devices. There is ... more Abstract Touchscreens are becoming more and more popular, especially in mobile devices. There is also clear evidence of the benefits of tactile feedback in touchscreen interaction. However, the effect of the evident latency in interaction has been completely neglected in earlier investigations of touchscreen interaction. In this study we examined the effect of tactile feedback latencies on the usability of a touchscreen keypad.

Abstract This paper presents an investigation into the performance of squeezing as a manipulative... more Abstract This paper presents an investigation into the performance of squeezing as a manipulative interaction technique in comparison to tilting with an aim to answer two questions: is squeezing an effective input technique for mobile devices and can tactile feedback improve performance? The experiment results show that both input methods are viable but squeezing is significantly faster and more sustainable than tilting (with and without tactile feedback).

We describe the preliminary results from an experiment investigating the perceived intensity of m... more We describe the preliminary results from an experiment investigating the perceived intensity of modulated friction created by electrostatic force, or electrovibration. A prototype experimental system was created to evaluate user perception of sinusoidal electrovibration stimuli on a flat surface emulating a touch screen interface. We introduce a fixed 6-point Effect Strength Subjective Index (ESSI) as a measure of generic sensation intensity, and compare it with an open magnitude scale.

Recent work has begun to focus on the use of games as a platform for energy awareness and eco-fee... more Recent work has begun to focus on the use of games as a platform for energy awareness and eco-feedback research. While technical advancements (wireless sensors, fingerprinting) make timely and tailored feedback an objective within easy reach, we argue that taking into account the users' own personal consumption behavior and tailoring feedback accordingly is a key requirement and a harder challenge.

Abstract Recent research shows that there has been increased interest in investigating the role o... more Abstract Recent research shows that there has been increased interest in investigating the role of mood and emotions in the HCI domain. Our moods, however, are complex. They are affected by many dynamic factors and can change multiple times throughout each day. Furthermore, our mood can have significant implications in terms of our experiences, our actions and most importantly on our interactions with other people.

Abstract ForcePhone is a mobile synchronous haptic communication system. During phone calls, user... more Abstract ForcePhone is a mobile synchronous haptic communication system. During phone calls, users can squeeze the side of the device and the pressure level is mapped to vibrations on the recipient's device. The pressure/vibrotactile messages supported by ForcePhone are called pressages. Using a lab-based study and a small field study, this paper addresses the following questions: how can haptic interpersonal communication be integrated into a standard mobile device?

While some research has been performed on the human understanding of static graph layout algorith... more While some research has been performed on the human understanding of static graph layout algorithms, dynamic graph layout algorithms have only recently been developed sufficiently to enable similar investigations. This paper presents the first empirical analysis of a dynamic graph layout algorithm, focusing on the assumption that maintaining the “mental map” between time-slices assists with the comprehension of the evolving graph. The results confirm this assumption with respect to some categories of tasks.

A great deal of research has investigated the potential parameters of tactile feedback for virtua... more A great deal of research has investigated the potential parameters of tactile feedback for virtual buttons. However, these studies do not take the possible effects of feedback latencies into account. Therefore, this research investigates the impact of tactile feedback delays on touchscreen keyboard usage. The first experiment investigated four tactile feedback delay conditions during a number entry task.

Abstract This paper reports the results of an exploratory study into inadvertent grip pressure ch... more Abstract This paper reports the results of an exploratory study into inadvertent grip pressure changes on mobile devices with a focus on the differences between static lab-based and mobile walking environments. The aim of this research is to inform the design of more robust pressure input techniques that can accommodate dynamic mobile usage. The results of the experiment show that there are significant differences in grip pressure in static and walking conditions with high levels of pressure variation in both.

As Figure 2 shows, EnergyLife is layered atop our BeAware framework, 1 which takes data from a de... more As Figure 2 shows, EnergyLife is layered atop our BeAware framework, 1 which takes data from a dedicated sensor on the household's fuse box as well as from wireless sensors in appliance plugs. In this way, the framework can measure electricity consumption both from the household overall and from individual appliances. The framework accommodates either off-the-shelf sensors such as Plugwise or wireless sensors that we designed to offer more precision and better connection.

Proceeding of the twenty-sixth …, Jan 1, 2008

… of the 9th international conference on …, Jan 1, 2007

Graph Drawing, Jan 1, 2007

Conference on Human Factors in Computing Systems, Jan 1, 2006

Proceedings of the 2nd …, Jan 1, 2007

CHI'07 extended abstracts on Human …, Jan 1, 2007

Tactons (tactile icons) are structured vibrotactile mes-sages which can be used for non-visual in... more Tactons (tactile icons) are structured vibrotactile mes-sages which can be used for non-visual information presentation. Information can be encoded in a set of Tactons by manipulating parameters available in the tactile domain. One limitation is the number of avail-able usable ...