1. Perception of Objects
in Technical Illustrations:
A Challenge in
Technical Communication
s1170002 Yu Arai
CLR Technical Communication Laboratory
Supervised by Prof. Debopriyo Roy
2/14/2013
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2. Overview
1. Introduction
2. Work Flow
3. Method
Ø Making Figures
Ø Data collecting from Test sheets
Ø Data analysis
4. Findings
5. Discussion
6. Conclusion
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3. Introduction
§ Mental image is . . .
like a picture in own brain.
§ Mental rotation is . . .
Basically about how the brain moves objects in the physical space in a
manner that helps with positional understanding of objects in space.
§ Technical illustration is . . .
The use of illustration to visually communicate information of a technical
nature.
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4. Work Flow Make Figures
↓
Top view version figures
↓
Make Test seats
↓
Take test
↓
Data collect
↓
Analysis
↓
SPSS
↓
Discussions
↓
Conclusions
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5. Method – Making Figures (POSER)
Heights
a. Chest height
b. Waist height
Activities
a. Holding a Ball
b. Throwing a Ball
Camera Positions
1. Front – 0degree
2. 1/3rd Side – 30 degrees
3. Side – 90 degrees
4. 1/3rd Back – 120 degrees
5. Back – 180 degrees
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B : Top of view
A : Basic View

6. Method – Data collecting
ü 41 students who are non-native English speaker participated in this study.
ü Having 20 test sheets.
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7. Method – Data analysis (SPSS)
§ Given a score of either 1 or 0.
§ The data was entered in SPSS statistical software
for data analysis
§ A score in the range of 1-5 was reported for each
test sheet.
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8. Finding – Cochran Test
• Correct Answer : 1
• Incorrect Answer : 0
• Q = 17.968 Asymp.sig. = .525
• P > .05
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9. Chest height – Confidence data
3.80
3.68
3.80 3.80
3.73
3.53
3.63
3.70
3.85
3.73
3.30
3.40
3.50
3.60
3.70
3.80
3.90
Front 1/3 side Side 1/3 back Back
Holding
Throwing
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10. Waist height – Confidence data
3.93 3.93
3.80
3.90
3.73
3.95
3.78 3.78
3.80
3.83
3.60
3.65
3.70
3.75
3.80
3.85
3.90
3.95
4.00
Front 1/3 side Side 1/3 back Back
Holding
Throwing
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11. Finding – Friedman test
• 20 body positions/ height/ action
ü Chi-square = 25.172
ü Asymp.sig. = .115 > .05
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12. Finding – Confidence level
Correlations Between Personal Value Sig. Value
Throwing Chest Back .514** .001
Throwing Waist Side .474** .002
Holding Waist Back .439** .005
Holding Waist Front .429** .006
Throwing Waist 1/3rd Back .406** .009
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Significant Correlations between Mean Accuracy Scores and Confidence Scores
Significant Correlations between Mean Accuracy Scores and Confidence ScoresSignificant Correlations between Mean Accuracy Scores and Confidence Scores

13. Discussion
Ø Body height/rotation/action
§ When compared with a plan view, it becomes
more various visual cues.
• Accuracy score around the 85 – 95% level
Ø Similarity body height – action - rotation
§ 20 body position – insignificant difference
§ Height/Action combinations – insignificant
difference
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14. Conclusion and Future research
§ Explored the effect of Body rotation, height and
action
ü Increased the accuracy levels
ü reader’s interesting approach
§ In the future research…
o The level of correctness should be analyzed carrying out
time observation.
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15. Thank you
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