Situational visual impairments on mobile devices - modeling the effects of bright outdoor environments
Letter Of Changes: Here's a summary of the reviewers comments and our responses / changes:
1. *Proofread / review grammar* - completed
2. *The novelty of the paper should be discussed in the introduction section* - A list of three original contributions has been added near the end of Section 1 (introduction)
3. *The setup of experiments A, B, and C, along with their differences, should be briefly discussed sooner (after introducing these three experiments)* - the beginning of Section 4 has been expanded to add the summaries of Studies A-C
4. *The conclusion and discussion section is very long. It is better to divide them into two separate sections, with the conclusion consisting of only one or two paragraphs at most. The discussion section can then expand further.* - This section was split and the conclusion has been placed into its own section
5. *The design of the study, including independent and dependent variables, should be clearly stated in an HCI study* - These descriptions have been added at the start of Section 4 (describing studies A-C) and Section 6 (describing the spectroradiometer measurements)
6. *Visualizing the colors in Table 1 can help readers better understand the paper.* - Table 1 has been updated to include the colours
7. *Providing more images of different conditions and experiments could help readers better understand the content* - see #8 below
8. *It would be beneficial to include a picture depicting the room setup, including the participant's viewing angle during the experiment.* - Figure 6 was added to help illustrate the experimental setup and procedure, along with additional text in Section 4.4. In addition, addressing commons #3 and #5 also helped clarify the setup Studies A-C.
9. *It is interesting to investigate whether the complexity level of the reading task influences the outcomes.* - the colour differentiation task in studies A-C was deliberately selected to always the same for consistency. It would be interesting to vary this task - and the future studies will do so, as our experimental setup continues to evolve and we investigate the effect of surround and the chromatic properties screen contents on bright light SVIs - but such work would lie outside the scope of this paper
10. *Section 3 is titled "Motivation and .., however, the motivation is not explained in this section* - the word "Motivation" has been removed from the title of Section 3, since the motivation is described in detail in Section 1 and is referred to in other sections of the paper.
Keywords: HCI, accessibility, mobile computing, universal design
Abstract: Mobile device users frequently experience Situational Vision Impairments (SVIs) when viewing screen content in bright outdoor environments. Designers could help alleviate SVIs if they had design tools that illustrated the effects that bright outdoor environments have on screen content. However, the exact nature of the underlying factors that lead to bright environment SVIs are poorly understood. To address this, we build on previous work by exploring the effects of bright environmental lighting on display content visibility using in-lab studies. In particular, we measured the differentiability of achromatic colours under a variety of realistic screen content and environmental brightnesses. Surprisingly, we found that environmental brightness makes a significant but relatively small contribution to reducing screen content visibility, with screen content brightness having a larger effect. As such, we conclude that non-glare ambient light reflecting off a screen has little influence on the visibility of that screen's content, and make recommendations for future research to help map the true factors underlying SVIs.
Submission Number: 51
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