Effect of Image Polarity on VDT Task Performance

Snyder, Harry L.; Decker, Jennie J.; Lloyd, Charles J.; Dye, Craig J.

doi:10.1177/154193129003401906

Cited by 25 publications

(14 citation statements)

References 1 publication

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“…Lobe shapes mapped in the positive polarity condition were larger, rounder and more regular than those mapped in the negative polarity condition. These results may go some way to account for previous findings that visual search performance was significantly better with positive polarity stimuli (Snyder et al 1990, Shen et al 2009). The greater ability of participants to identify targets under positive polarity conditions may also be attributed to the widespread use and familiarity with reading the dark characters on white background used in most printed materials and visual displays.…”

Section: Display Polaritysupporting

confidence: 49%

“…However, some research on display polarity and visual performance showed that, stimulus polarity had no effect on visual acuity and subjective ratings (Wang and Chen 2000). Snyder, et al (1990) compared VDT task performance under positive and negative polarities and showed that performance under negative polarity was better. There was also evidence that negative polarity yielded marginally better visual acuity than positive polarity, with an overall white-on-black to black-on-white Snellen fraction ratio of 1.043 (Westheimer et al 2003).…”

Section: Introductionmentioning

confidence: 98%

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Effect of display polarity and luminance contrast on visual lobe shape characteristics

2012

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The effect of display polarity and luminance contrast on visual lobe (effective visual field) shape characteristics was studied using three levels of luminance contrast with combinations of positive and negative polarities. The binocular effective visual field for a detection task, with a peripherally presented target (V) embedded in a homogeneous competing background (Xs), was mapped on 24 imaginary axes passing through the fixation point. The results showed that visual lobes mapped using positive polarity were statistically larger in area, rounder and more regular in shape than those for negative polarity. The medium contrast condition lobes were more symmetric and regular than low contrast condition lobes, and lobe area and perimeter increased with increasing luminance contrast ratio. Under the interaction of positive polarity and high luminance contrast, visual lobes were found to be larger, smoother and rounder. The high level of luminance and contrast however resulted in a higher degree of visual discomfort. The results indicated that positive polarity and contrast of medium (26:1) to high (41:1) levels are possible display settings for better visual lobe characteristics and better anticipated search performance.Practitioner Summary: The effect of display polarity and luminance contrast on visual lobe shape characteristics was examined with uniform stimulus materials in this study. The results help to identify the optimum display settings for luminance contrast and display polarity to enhance lobe shape characteristics and hence search performance in industrial inspection tasks.

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Section: Display Polaritysupporting

confidence: 49%

Section: Introductionmentioning

confidence: 98%

Effect of display polarity and luminance contrast on visual lobe shape characteristics

2012

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“…For example, Saito et al 13 found that black objects on a white background were the best for VDT display types. However, Snyder et al 17 proposed that better visual performance was found with white objects on a black background. Thus, this study tried to find out if there was a relationship between Mura detection and polarity.…”

Section: Defined a New Regression Equation Between The Human Eyes Andmentioning

confidence: 99%

Measurement of human visual perception for Mura with some features

Chen

Hwang

Wen³

2008

J Soc Info Display

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Abstract— The defects of flat‐panel liquid‐crystal display are usually not uniform, and the defects are called as “Mura.” There are many factors that cause the Mura phenomenon. At present, the human eyes define the seriousness of Mura, and different operators define the same Mura phenomenon with different meanings. For this reason, there have been many conflicts between the suppliers of flat‐panel liquid‐crystal display and customers. In order to solve the conflicts between the suppliers and customers, some researchers proposed a regression equation for the luminance contrast threshold and the size of Mura. In addition to the effect of Mura size on luminance contrast threshold, this study investigated the relationship between other factors and luminance contrast threshold. An analysis of the results show that Mura size, polarity of Mura, Mura position, and different color backgrounds significantly affect the visual contrast threshold. However, polarity did not significantly affect visual contrast threshold. In this study, it was found that Mura size was more important than the other factors for visual contrast threshold. The results of this study is expected to be referenced for inspection by the LCD industry.

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“…However, other studies yielded no significant difference between the two polarities (Shieh, 2000;Wang & Chen, 2003). Snyder, Decker, Lloyd, and Dye (1990) measured the performance of operators in accuracy and response time (RT) in visual search and reading tasks performed under positive and negative polarity settings. Analyses showed that performance with negative polarity is either equal to or better than that of positive polarity.…”

Section: Display Polaritymentioning

confidence: 99%

Effects of Translational and Rotational Motions and Display Polarity on Visual Performance

et al. 2008

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This study investigated effects of both translational and rotational motion and display polarity on a visual identification task. Three different motion types--heave, roll, and pitch--were compared with the static (no motion) condition. The visual task was presented on two display polarities, black-on-white and white-on-black. The experiment was a 4 (motion conditions) x 2 (display polarities) within-subjects design with eight subjects (six men and two women; M age = 25.6 yr., SD = 3.2). The dependent variables used to assess the performance on the visual task were accuracy and reaction time. Motion environments, especially the roll condition, had statistically significant effects on the decrement of accuracy and reaction time. The display polarity was significant only in the static condition.

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Effect of Image Polarity on VDT Task Performance

Cited by 25 publications

References 1 publication

Effect of display polarity and luminance contrast on visual lobe shape characteristics

Effect of display polarity and luminance contrast on visual lobe shape characteristics

Measurement of human visual perception for Mura with some features

Effects of Translational and Rotational Motions and Display Polarity on Visual Performance

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