Orientation matters

Nguyen, Quan; Kipp, Michael

doi:10.1145/2556288.2557399

Cited by 8 publications

(1 citation statement)

References 14 publications

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“…This was repeated 10 times, with 10 randomly selected angles within their range of roll. This roll experiment-and the pitch experiment that is described next-largely followed a procedure from previous work on rotation using multi-finger gestures [25,36].…”

Section: Rollmentioning

confidence: 99%

Expressy

Wilkinson

Kharrufa

Hook

et al. 2016

Proceedings of the 2016 CHI Conference on Human Factors in Computing Systems

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Expressiveness, which we define as the extent to which rich and complex intent can be conveyed through action, is a vital aspect of many human interactions. For instance, paint on canvas is said to be an expressive medium, because it affords the artist the ability to convey multifaceted emotional intent through intricate manipulations of a brush. To date, touch devices have failed to offer users a level of expressiveness in their interactions that rivals that experienced by the painter and those completing other skilled physical tasks. We investigate how data about hand movementprovided by a motion sensor, similar to those found in many smart watches or fitness trackers -can be used to expand the expressiveness of touch interactions. We begin by introducing a conceptual model that formalizes a design space of possible expressive touch interactions. We then describe and evaluate Expressy, an approach that uses a wrist-worn inertial measurement unit to detect and classify qualities of touch interaction that extend beyond those offered by today's typical sensing hardware. We conclude by describing a number of sample applications, which demonstrate the enhanced expressive interaction capabilities made possible by Expressy.

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Section: Rollmentioning

confidence: 99%

Expressy

Wilkinson

Kharrufa

Hook

et al. 2016

Proceedings of the 2016 CHI Conference on Human Factors in Computing Systems

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Is Bigger Better? A Fitts’ Law Study on the Impact of Display Size on Touch Performance

List

Kipp

2019

Human-Computer Interaction – INTERACT 2019

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Touch-sensitive surfaces are already a standard form of interaction. These surfaces come in many different sizes like tablets or touch walls. However, there is little research to characterize the impact of surface size on touch performance. We conducted a Fitts' Law study of three display sizes (13.5" tablet, 28" monitor, 69.5" large monitor), comparing various performance measures. We found that the smallest size (13.5") is problematic both objectively (high error rate) and subjectively (imprecise, difficult-to-use). In contrast, both the medium (28") and the large display (69.5") perform equally well. However, small displays allow for greater interaction speed compared to very large screens. Our results can help interaction designers and automatic algorithms to optimize current and future touch devices.

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Where to Start? Exploring the Efficiency of Translation Movements on Multitouch Devices

Nguyen¹,

Kipp

2015

Human-Computer Interaction – INTERACT 2015

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Abstract. Predicting the efficiency of interaction techniques can be crucial for designing user interfaces. While models like Fitts' law make general predictions, there is little research on how efficiency varies under different conditions like in which screen region a movement starts and in which direction it is going, and whether the surface is horizontal or vertical. This study investigates these aspects with regard to translation movements on a touch screen, using an extended Fitts' law setup and considering arm kinematics. The results show that on horizontal displays translation is faster and causes less arm fatigue than on vertical ones. Also, on horizontal displays, we identified screen regions and movement directions that allow significantly faster movement compared to others. Finally, movements that employ shorter kinematic chains (e.g. just the wrist) are significantly faster than those that use longer ones (e.g. wrist, elbow, shoulder). We suggest adjustments to Fitts' original formulation. In the future, our findings can inform or partially automate positioning decisions in interaction design.

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Orientation matters

Cited by 8 publications

References 14 publications

Expressy

Expressy

Is Bigger Better? A Fitts’ Law Study on the Impact of Display Size on Touch Performance

Where to Start? Exploring the Efficiency of Translation Movements on Multitouch Devices

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