Improving the accuracy of touch screens: an experimental evaluation of three strategies

Potter, Richard; Weldon, Linda J.; Shneiderman, Ben

doi:10.1145/57167.57171

Cited by 245 publications

(198 citation statements)

References 3 publications

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“…E por não precisar deslocar as mãos e o olhar para outros dispositivos de entrada de dados, como mouse e teclado, as telas sensíveis ao toque se tornam intuitivas e de fácil utilização, principalmente para iniciantes. Sherr (1988), Greenstein e Arnaut (1988), Beringer e Peterson (1985), Potter et al (1988Potter et al ( , 1989, Sears e Shneiderman (1991) apresentam estudos que apontam a eficiência das telas touchscreen, porém não deixam de salientar a sua falta de precisão para tarefas de alta resolução.…”

Section: Pessoas Idosas E a Tecnologia Touchscreenunclassified

Inclusão Digital de Pessoas Idosas: Um Estudo de Caso utilizando Computadores Desktop e Tablets

Rocha

Faria

Sales

et al. 2016

RENOTE

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Este estudo tem como objetivo apresentar os resultados da interação de um grupo de idosos utilizando computadores pessoais e tablets em projeto de inclusão digital e foi realizado na Faculdade de Arquitetura, Artes e Comunicação, UNESP, campus Bauru. Participaram nestas Oficinas 18 pessoas idosas, com idade entre 60 e 75 anos, todos alfabetizados e com escolaridade e classes sociais heterogêneas. A metodologia utilizada foi pesquisa de campo exploratória e com abordagem qualitativa. O estudo foi dividido em duas fases. Na primeira todos os participantes aprenderam informática básica, como navegação e comunicação na internet, e edição de textos, utilizando computadores desktop. Na segunda fase, 13 idosos continuaram utilizando os desktops, enquanto os outros cinco idosos utilizaram os tablets. Entre os resultados obtidos com os uso dos tablets neste projeto, os usuários idosos destacaram a facilidade de executar as tarefas neste dispositivo, pela facilidade de uso, o manuseio, a mobilidade, a sua leveza e o acesso aos aplicativos nestes dispositivos.

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Section: Pessoas Idosas E a Tecnologia Touchscreenunclassified

Inclusão Digital de Pessoas Idosas: Um Estudo de Caso utilizando Computadores Desktop e Tablets

Rocha

Faria

Sales

et al. 2016

RENOTE

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“…Potter et al [12] proposed Take-Off that enables pointing adjustment and avoids finger occlusion by showing a cursor slightly above the finger position. One drawback of this technique is that the user does not know the position of the cursor until her/his finger touches the screen.…”

Section: Pointing Techniques For Touch-based Handheld Devicesmentioning

confidence: 99%

Precise Pointing Techniques for Handheld Augmented Reality

Thomas

Nigay

Kurata

2013

Lecture Notes in Computer Science

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Abstract. We propose two techniques that improve accuracy of pointing at physical objects for handheld Augmented Reality (AR). In handheld AR, pointing accuracy is limited by both touch input and camera viewpoint instability due to hand jitter. The design of our techniques is based on the relationship between the touch input space and two visual reference frames for on-screen content, namely the screen and the physical object that one is pointing at. The first technique is based on Shift, a touch-based pointing technique, and video freeze, in order to combine the two reference frames for precise pointing. Contrastingly -without freezing the video-, the second technique offers a precise mode with a cursor that is stabilized on the physical object and controlled with relative touch inputs on the screen. Our experimental results show that our techniques are more accurate than the baseline techniques, namely direct touch on the video and screen-centered crosshair pointing.

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“…Prior finger-based pointing techniques suffered from two problems, which Shift remedies: the occlusion caused by the hand, and the lack of precision caused by fingers that are larger than many targets. Prior to Shift, the Offset Cursor was a popular design that placed the selection point a standard distance above the finger contact point (Potter et al, 1988;Sears and Shneiderman, 1991). But the Offset Cursor required users to ''aim low'' in anticipation of the constant offset, ruining the possibility of direct-touch for large targets.…”

Section: Thumb-and Finger-based Mobile Device Interactionmentioning

confidence: 99%

“…In order to isolate the physical performance of hand postures on a mobile device, we had to create an experiment apparatus that circumvented the two wellknown perceptual problems of direct-touch on touch screens, namely the occlusion caused by the user's hand and the unwieldy ''fat finger'' that creates an uncertain touch location (Potter et al, 1988;Sears and Shneiderman, 1991;Vogel and Baudisch, 2007;Wigdor et al, 2007). We argue that innovations in display and sensing technologies will continue to ameliorate these problems, and therefore they should not confound our results.…”

Section: Apparatusmentioning

confidence: 99%

The performance of hand postures in front- and back-of-device interaction for mobile computing

Wobbrock

Myers

Aung³

2008

International Journal of Human-Computer Studies

129

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Three studies of different mobile-device hand postures are presented. The first study measures the performance of postures in Fitts' law tasks using one and two hands, thumbs and index fingers, horizontal and vertical movements, and front-and back-of-device interaction. Results indicate that the index finger performs well on both the front and the back of the device, and that thumb performance on the front of the device is generally worse. Fitts' law models are created and serve as a basis for comparisons. The second study examines the orientation of shapes on the front and back of a mobile device. It shows that participants' expectations of visual feedback for finger movements on the back of a device reverse the direction of their finger movements to favor a ''transparent device'' orientation. The third study examines letter-like gestures made on the front and back of a device. It confirms the performance of the index finger on the front of the device, while showing limitations in the ability for the index finger on the back to perform complex gestures. Taken together, these results provide an empirical foundation upon which new mobile interaction designs can be based. A set of design implications and recommendations are given based directly on the findings presented. r

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Improving the accuracy of touch screens: an experimental evaluation of three strategies

Cited by 245 publications

References 3 publications

Inclusão Digital de Pessoas Idosas: Um Estudo de Caso utilizando Computadores Desktop e Tablets

Inclusão Digital de Pessoas Idosas: Um Estudo de Caso utilizando Computadores Desktop e Tablets

Precise Pointing Techniques for Handheld Augmented Reality

The performance of hand postures in front- and back-of-device interaction for mobile computing

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