Association of hand size with usability assessment parameters of a standard handheld computer pointing device

2016 ◽  
pp. 351-356
Keyword(s):  
Handheld Computer ◽  
Usability Assessment ◽  
Hand Size ◽  
Pointing Device

Arbeitsstress, sozialer Stress und Schlafqualität:

2003 ◽  
Vol 11 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Peter Schulz ◽  
Juliane Hellhammer ◽  
Wolff Schlotz
Keyword(s):  
Handheld Computer ◽  
Sozialer Stress

Zusammenfassung. An 309 Probanden werden in einer Querschnittsuntersuchung zwei Hypothesen überprüft: (1) Schlafstörungen hängen mit sozialem Stress zusammen, nicht mit Arbeitsstress und (2) das Personmerkmal Besorgnisneigung hat sowohl einen direkten als auch einen indirekten, über Stress vermittelten, Effekt auf Schlafstörungen. Nach statistischer Kontrolle der Variablen Besorgnisneigung, Alter und Krankheitshäufigkeit findet sich neben anderen Ergebnissen ein negativer Zusammenhang von Schlafqualität mit sozialem Stress, nicht aber mit Arbeitsstress. Dieser Befund kann in einer anschließenden Pfadanalyse bestätigt werden. In einer Längsschnittuntersuchung wird dann Hypothese (3) überprüft: Sozialer Stress verursacht Beeinträchtigungen der Schlafzufriedenheit. 76 Versuchsteilnehmern wurden Handheld-Computer ausgehändigt, die an zwei aufeinanderfolgenden Tagen Schlafzufriedenheit und verschiedene Arten der Beanspruchung erfassten. Eine crossed-lagged Panel Analyse zeigt einen Zusammenhang von sozialem Stress am ersten Tag mit Schlafzufriedenheit am zweiten Tag, aber keinen umgekehrten Zusammenhang. Die Ergebnisse weisen auf die Bedeutung von Besorgnisneigung und sozialem Stress für die Erklärung von Schlafstörungen hin.

Use of product-interactive focus groups for requirements capture and usability assessment

2004 ◽  
Author(s):  
Young S. Lee ◽  
Tonya L. Smith-Jackson ◽  
Maury A. Nussbaum ◽  
Kei Tomioka ◽  
Yogesh Bhatkhande
Keyword(s):  
Focus Groups ◽  
Usability Assessment

The Determinants of Capital Adequacy Ratio: The Case of the Vietnamese Banking System in the Period 2011-2015

2017 ◽  
Vol 33 (2) ◽  
Author(s):  
Ngoc Anh Nguyen
Keyword(s):  
Banking System ◽  
Precious Metals ◽  
Capital Adequacy ◽  
The Other ◽  
Total Asset ◽  
Data Set ◽  
Hand Size ◽  
Net Interest Margin ◽  
Capital Adequacy Ratio ◽  
Positive Effect

The analysis of a data set of observation for Vietnamese banks in period from 2011 - 2015 shows how Capital Adequacy Ratio (CAR) is influenced by selected factors: asset of the bank SIZE, loans in total asset LOA, leverage LEV, net interest margin NIM, loans lost reserve LLR, Cash and Precious Metals in total asset LIQ. Results indicate based on data that NIM, LIQ have significant effect on CAR. On the other hand, SIZE and LEV do not appear to have significant effect on CAR. Variables NIM, LIQ have positive effect on CAR, while variables LLR and LOA are negatively related with CAR.

scholarly journals The signing body: extensive sign language practice shapes the size of hands and face

2021 ◽  
Author(s):  
Laura Mora ◽  
Anna Sedda ◽  
Teresa Esteban ◽  
Gianna Cocchini
Keyword(s):  
Sign Language ◽  
Body Part ◽  
Spatial Context ◽  
Dependent Manner ◽  
Body Parts ◽  
Baseball Players ◽  
Space Condition ◽  
Hand Size ◽  
Stable Representation ◽  
The Face

AbstractThe representation of the metrics of the hands is distorted, but is susceptible to malleability due to expert dexterity (magicians) and long-term tool use (baseball players). However, it remains unclear whether modulation leads to a stable representation of the hand that is adopted in every circumstance, or whether the modulation is closely linked to the spatial context where the expertise occurs. To this aim, a group of 10 experienced Sign Language (SL) interpreters were recruited to study the selective influence of expertise and space localisation in the metric representation of hands. Experiment 1 explored differences in hands’ size representation between the SL interpreters and 10 age-matched controls in near-reaching (Condition 1) and far-reaching space (Condition 2), using the localisation task. SL interpreters presented reduced hand size in near-reaching condition, with characteristic underestimation of finger lengths, and reduced overestimation of hands and wrists widths in comparison with controls. This difference was lost in far-reaching space, confirming the effect of expertise on hand representations is closely linked to the spatial context where an action is performed. As SL interpreters are also experts in the use of their face with communication purposes, the effects of expertise in the metrics of the face were also studied (Experiment 2). SL interpreters were more accurate than controls, with overall reduction of width overestimation. Overall, expertise modifies the representation of relevant body parts in a specific and context-dependent manner. Hence, different representations of the same body part can coexist simultaneously.

scholarly journals Usability assessment of compaction operator support systems using virtual prototyping

2021 ◽  
Vol 129 ◽  
pp. 103784
Author(s):  
Denis Makarov ◽  
Faridaddin Vahdatikhaki ◽  
Seirgei Miller ◽  
Sajjad Mowlaei ◽  
André Dorée
Keyword(s):  
Support Systems ◽  
Virtual Prototyping ◽  
Usability Assessment

scholarly journals Increasing Usability of Homecare Applications for Older Adults: A Case Study

Designs ◽  
2019 ◽  
Vol 3 (2) ◽  
pp. 23 ◽  
Author(s):  
Christos Panagopoulos ◽  
Andreas Menychtas ◽  
Panayiotis Tsanakas ◽  
Ilias Maglogiannis
Keyword(s):  
Emergency Response ◽  
Independent Living ◽  
The Elderly ◽  
Usability Assessment ◽  
Technological Advances ◽  
System Usability Scale ◽  
System Usability ◽  
Practical Guidelines ◽  
Depth Interviews

As the world’s population is ageing, the field dealing with technology adoption by seniors has made headway in the scientific community. Recent technological advances have enabled the development of intelligent homecare systems that support seniors’ independent living and allow monitoring of their health status. However, despite the amount of research to understand the requirements of systems designed for the elderly, there are still unresolved usability issues that often prevent seniors from enjoying the benefits that modern ICT technologies may offer. This work presents a usability assessment of “HeartAround”, an integrated homecare solution incorporating communication functionalities, as well as health monitoring and emergency response features. An assessment with the system usability scale (SUS) method, along with in-depth interviews and qualitative analysis, has provided valuable insights for designing homecare systems for seniors, and validated some effective practical guidelines.

The Role of Hand Size in the Fake-Hand Illusion Paradigm

Perception ◽  
10.1068/p5853 ◽  
2007 ◽  
Vol 36 (10) ◽  
pp. 1547-1554 ◽  
Author(s):  
Francesco Pavani ◽  
Massimiliano Zampini
Keyword(s):  
Body Image ◽  
Body Schema ◽  
Body Representation ◽  
The Body ◽  
Video Image ◽  
Body Parts ◽  
Statistical Correlations ◽  
Hand Size ◽  
Visible Hand

When a hand (either real or fake) is stimulated in synchrony with our own hand concealed from view, the felt position of our own hand can be biased toward the location of the seen hand. This intriguing phenomenon relies on the brain's ability to detect statistical correlations in the multisensory inputs (ie visual, tactile, and proprioceptive), but it is also modulated by the pre-existing representation of one's own body. Nonetheless, researchers appear to have accepted the assumption that the size of the seen hand does not matter for this illusion to occur. Here we used a real-time video image of the participant's own hand to elicit the illusion, but we varied the hand size in the video image so that the seen hand was either reduced, veridical, or enlarged in comparison to the participant's own hand. The results showed that visible-hand size modulated the illusion, which was present for veridical and enlarged images of the hand, but absent when the visible hand was reduced. These findings indicate that very specific aspects of our own body image (ie hand size) can constrain the multisensory modulation of the body schema highlighted by the fake-hand illusion paradigm. In addition, they suggest an asymmetric tendency to acknowledge enlarged (but not reduced) images of body parts within our body representation.

scholarly journals Usability Evaluation of Slanted Computer Mice

2021 ◽  
Vol 18 (8) ◽  
pp. 3854
Author(s):  
Miguel L. Lourenço ◽  
Fátima Lanhoso ◽  
Denis A. Coelho
Keyword(s):  
Ease Of Use ◽  
Perceived Ease Of Use ◽  
Slant Angle ◽  
Mean Values ◽  
Random Subset ◽  
Hand Size ◽  
Preference Rank ◽  
Size Groups ◽  
Subjective Usability ◽  
Conventional Device

Prevention of musculoskeletal disorders is supported by use of slanted rather than horizontal pointing devices, but user acceptance of the former may be compromised due to lower perceived ease of use. This study compares subjectively rated usability (N = 37) for three sizes of slanted computer mice and includes a horizontal small conventional device as a reference. For a random subset of the sample (n = 10), objective usability parameters were also elicited. Participants followed a standard protocol which is based on executing graphical pointing, steering, and dragging tasks generated by a purpose-built software. Subjective ratings were collected for each of the four pointing devices tested. The three slanted devices differed in size but were chosen because of an approximately similar slant angle (around 50–60 degrees relative to the horizontal plane). Additionally, effectiveness and efficiency were objectively calculated based on data recorded for the graphical tasks’ software for a random subset of the participants (n = 10). The results unveil small differences in preference in some of the subjective usability parameters across hand size groups. This notwithstanding, the objective efficiency results are aligned with the subjective results, indicating consistency with the hypothesis that smaller slanted devices relative to the user’s hand size are easier to use than larger ones. Mean values of weighted efficiency recorded in the study range from 68% to 75%, with differences across devices coherent with preference rank orders.

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