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Temporary suppression of visual processing in an RSVP task: an attention blink?

Temporary suppression of visual processing in an RSVP task: an attention blink?. By Raymond, Shapiro, & Arnell JEP:HPP. Attention blink phenomenon. What is it? Why does it occur? What can we say about the mechanism of human attention from this?

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Temporary suppression of visual processing in an RSVP task: an attention blink?

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  1. Temporary suppression of visual processing in an RSVP task: an attention blink? By Raymond, Shapiro, & Arnell JEP:HPP

  2. Attention blink phenomenon • What is it? • Why does it occur? • What can we say about the mechanism of human attention from this? • How does this cognitive phenomenon help understand our everyday activities?

  3. Attention blink experiment • Coglab CD • You see a stream of 19 letters (110ms for each letter). • After seeing the stream , • Press J if J is present • Press K if K is present • Press J&K if both J and K are present. • Press nothing if you see neither J nor K.

  4. Manipulations • Presence / absence • In some trials, J and K are present • In some trials, only J is present • In some trials, only K is present • J-K separation • In some trials, 0, 2, 4, 6, and 8 letters separated J and K

  5. General results • The identification of the second target letter is very low when it quickly follows the first target letter. • Why? • Attention is like a scarce resource. You use your attention to the first letter, but to replenish it, you need some time. • Because your attention resource is depleted, you can’t see the second letter when it is shown shortly after the first letter.

  6. Task load and selective attention • Attention is more like resources • Kahneman’s (1973) capacity theory • When a particular task demands lots of processing resources, then other tasks get fewer resources. No task Hard task Easy task Attention capacity

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