| SHORE
2001 : Web : Searching for Airline Tickets: A Comparison of Tabular and Graphical Presentations |
|
Results
In this experiment, we observed statistically significant difference
in the performance time of most of the complex tasks and one simple task.
However, there is no significant difference for the subjective
preferences. The raw data can be found in the appendices
3.1 Performance Time
Figure 1: The performance times of simple tasks
Figure 2: The performance times of complex tasks
3.2 Error Rate
Figure 3: The error rates of all tasks
3.3 Subjective Preferences
Figure 4: Subjective Rating
3.4 t-test
- Let N1 be the number of subjects for Flight-Line
- Let N2 be the number of subjects for Fare-Finder
- N1 = N2 = 10
- Significance level = 0.05
- t(0.025;18) = 2.101
- Null hypothesis: the mean are equal.
|
Flight-Line |
Fare-Finder |
|
|
| Tasks |
mean |
S.D. |
mean |
S.D. |
t-value |
Reject null hypothesis? |
| Simple Task 1 |
7.2 |
2.15 |
8.8 |
5.12 |
-0.91 |
NO |
| Simple Task 2 |
11.9 |
3.78 |
23.6 |
21.42 |
-1.70 |
NO |
| Simple Task 3 |
12.9 |
4.53 |
38.8 |
29.73 |
-2.72 |
YES |
| Complex Task 1 |
13.4 |
3.41 |
35.4 |
16.51 |
-4.13 |
YES |
| Complex Task 2 |
25.6 |
6.54 |
43.2 |
39.27 |
-1.40 |
NO |
| Complex Task 3 |
59.6 |
17.48 |
126.6 |
71.61 |
-2.87 |
YES |
| Subjective Question 1 |
7.2 |
1.14 |
6.4 |
1.88 |
1.09 |
NO |
| Subjective Question 2 |
7.4 |
1.26 |
6.5 |
2.12 |
1.15 |
NO |
| Subjective Question 3 |
7.4 |
0.84 |
6.8 |
2.20 |
0.80 |
NO |
| Subjective Question 4 |
7.6 |
1.51 |
7.0 |
1.63 |
0.85 |
NO |
| Subjective Question 5 |
8.2 |
0.63 |
7.2 |
2.62 |
1.17 |
NO |
| Subjective Question 6 |
7.9 |
0.69 |
7.3 |
1.12 |
1.26 |
NO |
| Subjective Question 7 |
8.2 |
0.63 |
8.3 |
0.82 |
-0.30 |
NO |
| Subjective Question 8 |
8.5 |
0.53 |
8.0 |
1.66 |
0.91 |
NO |
Table 1: The result of t-tests
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