Environmental Engineering Reference
In-Depth Information
and also in a comfortable posture while completing the virtual task. Participants were also
instructed to complete the questionnaire immediately after finishing the virtual task.
3. Results
3.1 Effect of colour of virtual background to visual symptoms
Table 1 shows the results of the experiment describing the effect of colour of the virtual
background on visual symptoms of the subjects. There are five types of colour used in this
experiment, which are Red, Fuchsia, Dark Sky Blue, Medium Slate Blue and White. The
colours were identified on the basis of user's preferences. Statistical binomial test at 5%
significant level shows that the overall background colour has an effect on the user i.e.
eyestrain and blurred vision syndrome. The eyestrain syndrome was experienced by 75% of
users when Red and White background colours were used while 63% was experienced by
the users when Fuchsia, Dark Sky Blue and Medium Slate Blue background colours were
used. The blurred vision syndrome was only experienced by users when Red background
colour was used.
Observation
Proportion (%)
Exact Sig.
(1-tailed)
No.
Colour
Symptoms
Decision
75
63
Eyestrain
Blurred Vision
0.633
0.321
Effect
Effect
1.
Red
2.
Fuchsia
63
Eyestrain
0.321
Effect
3.
Dark Sky Blue
63
Eyestrain
0.321
Effect
Medium Slate
Blue
4.
63
Eyestrain
0.321
Effect
5.
White
75
Eyestrain
0.633
Effect
p
> 0.05 ; N = 8
Table 1. Result of Experiment and Binomial Test of Visual Symptoms of Colour Virtual
Background
Observation
Proportion
(%)
Level of
Brightness
Exact Sig.
(1-tailed)
No.
Symptoms
Decision
Eyestrain
Dry and Irritated
Eyes
83
50
0.534
0.169
Effect
Effect
1.
10% level
2.
25% level
83
Eyestrain
0.534
Effect
3.
50% level
83
Eyestrain
0.534
Effect
Eyestrain
Dry and Irritated
Eyes
Light Sensitivity
100
67
50
0.178
0.138
0.169
Effect
Effect
Effect
4.
100% level
p
> 0.05 ; N = 8
Table 2. Result of Experiment and Binomial Test of Visual Symptoms of Virtual Lighting
