Civil Engineering Reference
In-Depth Information
FIGURE 24.6 (a) Initial search results displayed for sample path: searching for “Wedding songs” with subject as the
search type and all as the default format. (b) Next level of detail when the user clicks on the “Wedding music” link
shown in (a).
each associated screen display). Lewis and Wharton (1997) suggest asking four questions to help guide
this prediction process:
“Will the user be trying to achieve the right effect?”
.
“Will the user notice that the correct action is available?”
.
“Will the user associate the correct action with the desired effect?”
.
“If the correct action is performed, will the user see that progress is being made?”
.
More detailed questions can be identified by considering how different cognitive processes could influ-
ence performance (Card et al., 1983; Eysenck and Keane, 1990; Wickens and Hollands, 1999; Ashcraft,
2002; Wickens et al., 2004), such as:
.
Selective attention: What are the determinants of attention? What is most salient in the display? Where
will the user's focus of attention be drawn? (See Johnston and Dark, 1986; Pashler et al., 2001.)
.
Perception: How will perceptual processes influence the user's interpretation? How, for instance,
will the proximity of various items on the screen influence judgments of “relatedness” as predicted
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