March 2001
Intermediate to advanced
440 pages
18h 53m
English
Content preview from Your Wish is My Command
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13.5 A Visual Notation for Regular Expressions 263
13.1
Overall performance results.
Time(s) N errors
Conventional regular expression
Procedural text
Declarative graphic
Procedural graphic
117.6 60
lO6.7 48
86.1 48
86.2 38
Results
The notational format used to carry out the tasks had a highly significant ef-
fect on performance, F(38,1) - 26.8, p < .001. As shown in Table 13.1, all the
alternative notations were completed more quickly on average than con-
ventional regular expressions. Furthermore, the two graphical formats re-
sulted in fewer errors.
More detailed analysis shows that the use of a graphical format ...
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