Smartphone form factors: Effects of width and bottom bezel on touch performance, workload, and physical demand

Lee, Seul Chan; Chul, Min; Hwangbo, Hwan; Mo, Sookhee; Ji, Yong Gu

doi:10.1016/j.apergo.2017.10.002

Cited by 18 publications

(7 citation statements)

References 13 publications

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“…Although in this study, there were no statistically significant differences identified in sample and usage patterns for demographic variables such as gender and hand size, it has been reported in previous studies that demographic variables have a significant effect on smartphone design [17,24,25]. Balakrishnan and Paul [25] showed that the subjective satisfaction increases as the hand size of male and female subjects decreases when people text on mobile phones.…”

Section: Discussioncontrasting

confidence: 65%

“…Therefore, as the size of the entire smartphone is almost the same, the curvature does not affect stability. In addition, Lee et al [24] found that there was no significant difference between the NASA-TLX metrics according to bezel size in the smartphone. According to Lee et al [24], the bezel was located at the bottom of the smartphone, and the curvature display was located on the right side in this study.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, Lee et al [24] found that there was no significant difference between the NASA-TLX metrics according to bezel size in the smartphone. According to Lee et al [24], the bezel was located at the bottom of the smartphone, and the curvature display was located on the right side in this study. Therefore, there is no difference in the subjective feeling of the user due to the size change of the smartphone by the bezel or the curvature display.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Understanding the Relationship between User’s Subjective Feeling and the Degree of Side Curvature in Smartphone

et al. 2020

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To develop a flexible display, smartphones with edge screens with curved displays on both sides of the main screen have been used widely. Considering that small differences in the form of smartphones, such as length, width, and thickness, could affect user experience, the effects of the curvature of the edge screen should be identified. This study aimed to investigate the effects of the curvature of edge screens on subjective feelings of smartphone users and to find out the optimal curvature. In the experiment, four nonfunctional samples with different radii of curvature (4R/6R/8R/10R) were used as samples, and participants evaluated the five subjective feelings: grip/control comfort, front/side visibility, and stability of the samples with four usage patterns. Our results revealed that 8R is the optimal curvature for the edge screen based on subjective feelings in smartphone usage. Moreover, the effect of the curvature of the edge screen on grip comfort and control comfort varied according to the usage patterns. The results of this study can be applied to design of the curvature of edge screens in smartphones and it is expected that it will contribute to improvement of users’ satisfaction.

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Section: Discussioncontrasting

confidence: 65%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Understanding the Relationship between User’s Subjective Feeling and the Degree of Side Curvature in Smartphone

et al. 2020

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“…By varying three contextual factors (task type, motion, and lighting level), the researchers' study demonstrated that varying lighting conditions as well as motion affected mobile task performance. Lee, Cha, Hwangbo, Mo, & Ji (2018) tested the effect of varying two smartphone form factors (width and bottom bezel) on touch behaviors during one-handed interaction. The results showed that task performance, subjective workload, and electromyography all deteriorated with increasing width level and that difficulty increased as the bottom bezel level decreased.…”

Section: Related Workmentioning

confidence: 99%

Understanding and supporting individuals experiencing severely constraining situational impairments

Saulynas

Kuber

2019

Univ Access Inf Soc

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A special strain of situational impairment, termed "Severely Constraining Situational Impairments" (SCSI), was explored from a novel qualitative perspective. When a severely impairing event presents, the multitude and complexity of ambient agents are often overwhelming, leading to the inability to devise a solution. To classify and help design for them, interviews and participatory design-based workshops were conducted, revealing that (1) participants attempt to complete mobile transactions, even if it might place them in considerable danger, and (2) significant differences exist in the modalities and steps used to address the onset of a severely impairing event vs. those of a non-severe situational impairment. Design solutions generated from the workshops indicated that users want technology to take a larger role in helping manage the added cognitive load inherent in severely impairing events. The revealed implications for design indicate that to maximize the user experience in the mobile device transaction space, designers must account for the presence of these SCSI and the unique design specifications that they require.

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“…çalışmasında, cerrah ve asistanların farklı zorluktaki ameliyatlar sırasındaki iş yükleri NASA-TLX yöntemi kullanılarak ölçülmüştür. Lee ve diğ [60],. çalışmasında iki farklı faktöre sahip (genişlik ve alt çerçeve) akıllı telefon için, faktörlerin dokunma davranışları üzerindeki etkisini incelemiştir.…”

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Comparison of the total workload of local public transportation drivers with a new approach according to physical and mental workload criteria

Adar¹,

Delice²

2020

Pamukkale J Eng Sci

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Şehir içi toplu taşımada görev yapan şoförler, çalışma şekilleri sonucu hem kas iskelet sistemi sorunları ile karşılaşabilmekte hem de zihinsel olarak büyük baskı ve yorgunluk hissedebilmekte ve bu nedenle şoförlerin iş yükleri artmaktadır. Toplu taşımanın güvenlikli bir şekilde yapılması için şoförlerin toplam iş yüklerine dikkat edilmesi ve fazla olan iş yüklerinin azaltılması son derece önemlidir. Toplam iş yükü değerlendirmesi, birbiriyle çelişen zihinsel ve fiziksel iş yükü ölçütlerine bağlı olarak ortaya çıkan bir Çok Ölçütlü Karar Verme (ÇÖKV) problemi olarak ele alınabilir. Bu çalışma kapsamında şoförlerin toplam iş yükü ölçütleri bakımından karşılaştırılması için ÇÖKV yöntemlerinden olan AHP ve COPRAS yöntemlerinin bütünleşik bir yaklaşımı kullanılmıştır. İlk olarak; zihinsel iş yükü ölçütleri olarak NASA-TLX yöntem ölçütleri alınırken; fiziksel iş yükü ölçütleri özellikle şoförlerin sürekli ve tekrarlı çalışma duruşlarına bağlı olarak REBA yönteminde yer alan vücut bölümleri dikkate alınarak belirlenmiştir. Ardından, AHP yöntemi ile ölçütlerin önem ağırlıkları belirlenmiş ve bu ağırlıklar kullanılarak COPRAS yöntemi ile toplam iş yükü ölçütleri açısından altmış şoför karşılaştırılmıştır. Bir Büyükşehir Belediye'sine bağlı olarak çalışan şoförler üzerinde yapılan bu çalışmada en önemli ölçütler zaman baskısı olarak belirlenirken, boyun bölümünün diğer vücut bölümlerine göre daha çok zorlandığı tespit edilmiştir. Çalışmanın sonucunda elde edilen bulgulara göre şoförlerin iş yüklerinin azaltılması için alınması gereken önlemler sunulmuştur. Sonuç olarak, şoförler için hem zihinsel iş yükü hem de fiziksel iş yükü ölçütlerini ÇÖKV yöntemleri ile analiz eden başka bir çalışma bulunmaması nedeniyle bu çalışmanın literatüre katkıda bulunacağı düşünülmektedir.The drivers working in the local public transportation may face with musculoskeletal system problems as a result of their working style and they may feel mentally great pressure and fatigue and the workloads of drivers increase. It is extremely important to determine and reduce the total workload of drivers in order to ensure public transport in a safe manner. The total workload evaluation may be considered as a Multi-Criteria Decision Making (MCDM) problem caused by conflicting mental and physical workload criteria. In this study, an integrated approach of AHP and COPRAS methods, which is one of MCDM methods, was used to compare the drivers in terms of total workload criteria. Firstly; while NASA-TLX method criteria were considered as mental workload criteria; physical workload criteria were determined by considering the body parts in REBA method especially depending on the continuous and repeated working positions of the drivers. Then, the weights of the criteria were determined by AHP method and sixty drivers were compared with COPRAS method in terms of total workload by using these weights. The most important criteria were identified as time pressure on the drivers working for a Metropolitan Municipality, while the neck part of body was found to have mo...

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Smartphone form factors: Effects of width and bottom bezel on touch performance, workload, and physical demand

Cited by 18 publications

References 13 publications

Understanding the Relationship between User’s Subjective Feeling and the Degree of Side Curvature in Smartphone

Understanding the Relationship between User’s Subjective Feeling and the Degree of Side Curvature in Smartphone

Understanding and supporting individuals experiencing severely constraining situational impairments

Comparison of the total workload of local public transportation drivers with a new approach according to physical and mental workload criteria

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