A chair as ubiquitous input device

Probst, Kathrin; Lindlbauer, David; Haller, Michael; Schwartz, Bernhard; Schrempf, Andreas

doi:10.1145/2556288.2557051

Cited by 31 publications

(9 citation statements)

References 19 publications

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“…Besides new types of active workstations, a growing number of HCI-mediated health interventions have been designed to promote physical activity by offering a new interaction model involving the use of a computer or collaboration with colleagues at work. Probst, Lindlbauer, Haller, Schwartz, and Schrempf (2014) developed a chair-based human-computer interface, which allows the user to control the computer with different sitting postures and finally achieve active sitting. Similarly, Tap-Kick-Click uses foot-based interaction for standing desks to improve standing postures and physical movements (Saunders & Vogel, 2016).…”

Section: Technology For Workplace Fitness Promotionmentioning

confidence: 99%

HealthSit: Designing Posture-Based Interaction to Promote Exercise during Fitness Breaks

Ren¹,

Yu²,

Lü³

et al. 2018

International Journal of Human–Computer Interaction

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This research was motivated by a desire to help office workers change their sedentary behavior because a prolonged sedentary posture increases the risks of developing musculoskeletal injuries and chronic diseases, thus threatening their physical and psychological well-being. Regular breaks involving low-effort physical activities are effective in reducing the adverse impacts of inactive behaviors. In this article, we present the design of a posture-based interactive system called HealthSit, which was developed to promote a short lowerback stretching exercise during work breaks. Through a within-subject study involving 30 office workers, the effectiveness of HealthSit in facilitating the stretching exercise was examined by making comparisons between an interaction-aided, a guided, and a self-directed exercise mode. We also used HealthSit as a research probe to investigate the interactivity of the system in enhancing user experience and the psychological benefits of the fitness breaks. Compared with the other two modes, the interaction-aided exercise mode significantly improved the quality of the stretching exercise and enhanced motivation and emotional state. These results confirm the effectiveness of HealthSit in supporting fitness breaks as a new workplace technology. Based on our study, a set of design implications have been derived for technology-assisted fitness work breaks. KEYWORDSWork breaks; lower-back stretch; posture-based interaction; workplace fitness-promoting technology

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Section: Technology For Workplace Fitness Promotionmentioning

confidence: 99%

HealthSit: Designing Posture-Based Interaction to Promote Exercise during Fitness Breaks

Ren¹,

Yu²,

Lü³

et al. 2018

International Journal of Human–Computer Interaction

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“…A defining feature of implicit interactions is their occurrence as a result of the user input. Perhaps due to this feature, implicit has occasionally been defined as a quality of user's "action" (as in Schmidt's definition [83]) or "input" [e.g., 1,53,75,93]. Yet we argue that the suitable entity for intentionality is a specific outcome that results from user's input, namely an input-effect relationship.…”

Section: Implicit As Unintentionalmentioning

confidence: 88%

“…In HCI, interaction has been conceptualized in terms of mechanical consequence by antecedent, but also as user experience, tool-use or control [44], all of which make user attention or intention a prerequisite for interaction. Additionally, HCI uses are not limited to interaction and one can encounter other phrases such as "implicit sensing" [38,81], "implicit input" [53,75,93], "implicit interface" [87,93] or a specific outcome of user input, as in "implicit authentication" [13]. The diversity of uses raises the question of whether (or what entity within) interaction provides a useful unit of analysis.…”

Section: The Many Meanings Of Implicitmentioning

confidence: 99%

Explicating "Implicit Interaction"

Serim

2019

Proceedings of the 2019 CHI Conference on Human Factors in Computing Systems

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The term implicit interaction is often used to denote interactions that differ from traditional purposeful and attention demanding ways of interacting with computers. However, there is a lack of agreement about the term's precise meaning. This paper develops implicit interaction further as an analytic concept and identifies the methodological challenges related to HCI's particular design orientation. We first review meanings of implicit as unintentional, attentional background, unawareness, unconsciousness and implicature, and compare them in regards to the entity they qualify, the design motivation they emphasize and their constructive validity for what makes good interaction. We then demonstrate how the methodological challenges can be addressed with greater precision by using an updated, intentionality-based definition that specifies an input-effect relationship as the entity of implicit. We conclude by identifying a number of new considerations for design and evaluation, and by reflecting on the concepts of user and system agency in HCI. CCS CONCEPTS • Human-centered computing → HCI theory, concepts and models; User models.

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“…In the broad sense, a stroke gesture for human-computer interaction can be performed by our upper and lower limbs [12], or even by the head or whole body [13]. As the basic body movements that humans naturally and repetitiously perform, stroke gestures are of a motor-intuitive nature [14] and so have been widely applied in touch-based interfaces for pen input [15][16][17], text-editing [18] smartphone use [19] and game [20].…”

Section: Command-to-gesture Mappings For Mid-air Unistroke Gesturementioning

confidence: 99%

“…Symmetry 2021, 13,1926 2 o large display [3,4,5,6]. Moreover, the taxonomy of user-elicited gestures indicates a verse range of mental models [7] for constructing and understanding the commandgesture mappings.…”

Section: Introductionmentioning

confidence: 99%

Mapping Directional Mid-Air Unistroke Gestures to Interaction Commands: A User Elicitation and Evaluation Study

2021

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A stroke is the basic limb movement that both humans and animals naturally and repetitiously perform. Having been introduced into gestural interaction, mid-air stroke gestures saw a wide application range and quite intuitive use. In this paper, we present an approach for building command-to-gesture mapping that exploits the semantic association between interactive commands and the directions of mid-air unistroke gestures. Directional unistroke gestures make use of the symmetry of the semantics of commands, which makes a more systematic gesture set for users’ cognition and reduces the number of gestures users need to learn. However, the learnability of the directional unistroke gestures is varying with different commands. Through a user elicitation study, a gesture set containing eight directional mid-air unistroke gestures was selected by subjective ratings of the direction in respect to its association degree with the corresponding command. We evaluated this gesture set in a following study to investigate the learnability issue, and the directional mid-air unistroke gestures and user-preferred freehand gestures were compared. Our findings can offer preliminary evidence that “return”, “save”, “turn-off” and “mute” are the interaction commands more applicable to using directional mid-air unistrokes, which may have implication for the design of mid-air gestures in human–computer interaction.

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A chair as ubiquitous input device

Cited by 31 publications

References 19 publications

HealthSit: Designing Posture-Based Interaction to Promote Exercise during Fitness Breaks

HealthSit: Designing Posture-Based Interaction to Promote Exercise during Fitness Breaks

Explicating "Implicit Interaction"

Mapping Directional Mid-Air Unistroke Gestures to Interaction Commands: A User Elicitation and Evaluation Study

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