The Use of Iambic Pentameter in the

that was presented in the pilot experiments, because user eye saccades can be as short as
50ms. The 50ms exposure time was therefore more likely to provide participants with
visual information that is representative of what they would see in interface displays
during time limited tasks. The long exposure duration utilized a 4000ms exposure time,
as opposed to the 2000ms exposure time used in the pilot experiments, because it was
expected that information perceived in this amount of time more closely approximates
what users perceive in unlimited exposure times to interface displays. Targets followed
the mask screens and participants responded when they saw the target.
For each trial, participants were asked to observe the primes and unambiguous
targets before deciding how to group the central column of pushbuttons in the targets.
Figure 25 depicts all stimulus sequences. In Figure 25A, an ambiguous experimental
prime is followed by a global (common region) match target. In Figure 25B, an
ambiguous experimental prime is followed by a local (connectedness) match target. In
Figure 25C, a neutral prime is followed by a global (common region) match target. In
Figure 25D, a neutral prime is followed by a local (connectedness) match target. Right
and left side grouping responses were recorded for the unambiguous targets, along with
reaction times.
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