Popout search distinctive perceptual characteristics

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Unformatted text preview: nt Hit Absent Miss Absent False Alarm Correct Rejection 6 9/27/11   Vigilance is attending to a set of stimuli over a length of time in order to detect a target signal   Vigilance decreases rapidly over time (fatigue), thus misses and false alarms increase     Searching for a specific target among a field Feature (Pop ­out) search   Distinctive perceptual characteristics   More different from distractors, easier to detect   Conjunction search   Two or more features of interest   Requires attentional binding   More difficult ▪  Requires more time ▪  More effortful L L L L L L L L L L L O L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L T L L L L L L L L L Which box is it easier to detect a letter that is different? The box on top is a feature search The box on the bottom is a conjunction search 7 9/27/11   Individual Feature processing is done in parallel.   Simultaneous processing is done on the whole display   If feature is present ­ ­ we detect...
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