PSY270H1 Lecture 4: Short-Term Storage

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31 Jan 2019
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One role of attention may be to bind features. Visual search tasks involves using attention to focus on object features in particular location. Don"t need to look for other objects, only one feature. Ex: green circle among blue squares - search for green item or circular item. Presence or absence of target doesn"t influence feature searches as much as conjunction searches. On average, feature searches reaction times are lower. Number of distractors does not affect reaction time for feature searches. Green circle among green squares and blue circles - search for green circle. Reaction time increases when number of distractors increase. Feature searches do not require attention (automatic task), but conjunction searches do. According to feature integration theory visual search is a 2-stage process. Single features does not require attention and pops out automatically - this is the preattentive stage.

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