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class+19+lecture_attention+_part2_

class+19+lecture_attention+_part2_ - Cue A stimulus that...

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Sensation and Perception Class XIX: Attention & Sensory Processing
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Introduction Attention : Any of the very large set of selective processes in the brain To deal with the impossibility of handling all inputs at once, the nervous system has evolved mechanisms that are able to restrict processing to a subset of things, places, ideas, or moments in time Selective attention : The form of attention involved when processing is restricted to a subset of the possible stimuli
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Figure 8.2 Search for the raised hand in this piece of a “Where’s Waldo?” picture
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Selection in Space Reaction time (RT): A measure of the time from the onset of a stimulus to a response
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Unformatted text preview: Cue : A stimulus that might indicate where (or what) a subsequent stimulus will be • Cues can be valid (correct information), invalid (incorrect), or neutral (uninformative) Stimulus onset asynchrony (SOA): The time between the onset of one stimulus and the onset of another Selection in Space Cueing as a tool for examining attention • Simple probe detection experiment § Posner cueing paradigm • Cues are valid or invalid § RTs are shorter on valid cue trials § RTs are longer on invalid cue trials Figure 8.3 The Posner cueing paradigm Figure 8.4 The effect of a cue develops over time...
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class+19+lecture_attention+_part2_ - Cue A stimulus that...

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