Environmental Engineering Reference
In-Depth Information
second per piece (FR 5) and ten second per piece (FR 10); corresponding to virtual object in
sight every five second and ten second respectively. Statistical binomial test at 5% significant
level shows that both types of flow rates have an effect on the users, in which 75% of the
users experienced symptoms of eyestrain and 50% of the users also experienced blurred
vision and dry and irritated eyes symptoms.
3.5 Effect of speed of virtual object motion
Table 5 shows the result of the experiment on the effect of speed of virtual object on the
subjects. Two levels of speed were investigated, that is slow motion (0.050) and fast motion
(0.100). The result of statistical binomial test at 5% significant level proves that both speeds
have an effect to the users where both slow and fast motion caused the same visual
symptoms i.e. eyestrain, blurred vision, and dry and irritated symptoms.
Observation
Proportion (%)
Exact Sig.
(1-tailed)
No. Level of Speed
Symptoms
Decision
83
50
67
Eyestrain
Blurred Vision
Dry and Irritated Eyes
0.534
0.169
0.466
Effect
Effect
Effect
1.
Low Speed
75
50
50
Eyestrain
Blurred Vision
Dry and Irritated Eyes
0.633
0.114
0.114
Effect
Effect
Effect
2.
High Speed
p
> 0.05 ; N = 8
Table 5. Result of Experiment and Binomial Test of Visual Symptoms of Speed of a Virtual
Object
Level of
Resolution
Observation
Proportion (%)
Exact Sig.
(1-tailed)
No.
Symptoms
Decision
LCD
56
Eyestrain
0.166
Effect
1.
High Resolution
Medium
Resolution
89
Eyestrain
0.300
Effect
2.
56
Eyestrain
0.166
Effect
3
Low Resolution
CRT
Eyestrain
0.399
Effect
4.
High Resolution
67
Medium
Resolution
67
56
Eyestrain
Dry and Irritated Eyes
0.399
0.166
Effect
Effect
5.
67
56
Eyestrain
Dry and Irritated Eyes
0.399
0.166
Effect
Effect
6.
Low Resolution
p
> 0.05 ; N = 8
Table 6. Result of Experiment and Binomial Test of Visual Symptoms of Resolution of
Display Type
