Beautification



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a. This level combination of factors is not observed, thus the corresponding population marginal mean is not estimable.
Note: Formality Level: 1 = Low formality (on paper); 2 = Low formality (on Tablet PC); 3 = Medium-low formality; 4 = Medium-high formality; 5 = High formality.
Appendix M. Mean number of expected changes across each level of formality – according to between-subjects factors (design experience, major/specialization and study level)

Design experience

Major/ specialization

Study level

Formality level

Mean

Std. Error

None to non-CS/SE design experience

Non-CS/SE related majors

Undergraduate

1

10.50

1.64







2

9.25

1.21







3

9.42

1.43







4

7.33

1.23







5

6.50

1.31





Graduate/ postgraduate

1

11.75

2.84







2

8.25

2.09







3

10.25

2.47







4

9.00

2.13







5

8.25

2.27



CS/SE major

Undergraduate

1

12.29

1.52







2

10.00

1.12







3

9.29

1.32







4

7.71

1.14







5

7.21

1.22





Graduate/ postgraduate

1

.(a)

.







2

.(a)

.







3

.(a)

.







4

.(a)

.







5

.(a)

.

CS/SE design experience

non CS/SE related majors

Undergraduate

1

14.50

4.02







2

14.50

2.95







3

12.00

3.49







4

12.00

3.01







5

5.00

3.21





Graduate/ postgraduate

1

15.00

4.02







2

12.00

2.95







3

14.0

3.49







4

14.00

3.01







5

12.50

3.21



CS/SE

Undergraduate

1

15.00

1.42







2

12.19

1.04







3

9.88

1.23







4

8.13

1.06







5

8.00

1.14





Graduate/ postgraduate

1

16.90

1.80







2

13.90

1.32







3

11.90

1.56







4

12.70

1.35







5

10.50

1.44
a. This level combination of factors is not observed, thus the corresponding population marginal mean is not estimable.
Note: Formality Level: 1 = Low formality (on paper); 2 = Low formality (on Tablet PC); 3 = Medium-low formality; 4 = Medium-high formality; 5 = High formality.

Appendix N. One-way ANOVA and post-hoc multiple comparisons between total, quality, and expected changes made across each level of formality



Table N1.

Significant between group differences and linear trends found after conducting one-way ANOVA on total, quality and expected changes.



df

F

Sig.

Low formality (paper)

Between Groups

(Combined)

2

6.67

.002*





Linear Term

Contrast

1

13.23

.000**

Low formality (on Tablet PC)

Between Groups

(Combined)

2

8.15

.001*





Linear Term

Contrast

1

16.28

.000**

Medium-low formality

Between Groups

(Combined)

2

8.08

.001*





Linear Term

Contrast

1

15.26

.000**

Medium-high formality

Between Groups

(Combined)

2

9.10

.000*





Linear Term

Contrast

1

18.08

.000**

High formality

Between Groups

(Combined)

2

7.03

.001*





Linear Term

Contrast

1

13.43

.000**

* The between group difference is significant at the .05 level.

** The linear trend (linear contrast across levels of formality) found is significant at the .05 level.



Table N2.

Post-hoc multiple comparisons between total, quality, and expected changes made across each level of formality

Dependent Variable

(I) Total, Quality, Expected

(J) Total, Quality, Expected

Mean Difference (I-J)

Std. Error

Sig.

Low formality (paper)

Total Changes

Quality Changes

3.00

1.43

.115





Expected Changes

5.18*

1.43

.001



Quality Changes

Total Changes

-3.00

1.43

.115





Expected Changes

2.18

1.43

.387



Expected Changes

Total Changes

-5.18*

1.43

.001





Quality Changes

-2.18

1.43

.387

Low formality (on Tablet PC)

Total Changes

Quality Changes

2.12

.99

.104





Expected Changes

3.98*

.99

.000



Quality Changes

Total Changes

-2.12

.99

.104





Expected Changes

1.87

.99

.186



Expected Changes

Total Changes

-3.98*

.99

.000





Quality Changes

-1.87

.99

.186

Medium-low formality

Total Changes

Quality Changes

1.10

.97

.777





Expected Changes

3.78*

.97

.001



Quality Changes

Total Changes

-1.10

.97

.777





Expected Changes

2.68*

.97

.021



Expected Changes

Total Changes

-3.78*

.97

.001





Quality Changes

-2.68*

.97

.021

Medium-high formality

Total Changes

Quality Changes

2.33

.97

.054





Expected Changes

4.13*

.97

.000



Quality Changes

Total Changes

-2.33

.97

.054





Expected Changes

1.78

.97

.207



Expected Changes

Total Changes

-4.12*

.97

.000





Quality Changes

-1.78

.97

.207

High formality

Total Changes

Quality Changes

2.25*

.89

.040





Expected Changes

3.27*

.89

.001



Quality Changes

Total Changes

-2.25*

.89

.040





Expected Changes

1.02

.89

.772



Expected Changes

Total Changes

-3.27*

.89

.001





Quality Changes

-1.02

.89

.772

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