If target 2 follows target 1 really really quickly

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If Target 2 follows Target 1 really really quickly, people cannot remember Target 2 (200- 500 ms - people will fail to report it once they’ve learned Target 1) Attentional Blink (AB): Deficit in reporting T2 when it follows correctly identified T1 between 200-500ms -tasks are frustrating because they’re difficult -when there is shorter time between the two letters, it is harder to remember (when AB will activate)
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When Attention is Broken -Mechanisms of attention are KEY to producing and organizing our daily coherent behaviour. Neuropsychological disorders resulting in attentional dysfunctions. -Usually result from the damage to the parietal lobe(s) [blue in picture] SHAPE \* MERGEFORMAT Parietal lobe involved in: -Processing and integrating spacial information -Integration of sensory information -Visual-spacial processing (visual pathway that helps us reach things) -Has retinotopic maps Neuropsychological disorders resulting in attentional dysfunctions: Hemispatial neglect Results from unilateral (either LH or RH) damage to the parietal lobe Black spots = damage to the brain / brain is missing SHAPE \* MERGEFORMAT -These patients neglect information in ‘contra-lesional’ space (sensory information) -opposite side of brain containing necessary information -don’t have visual impairments - see, report and name things, but in normal life they disregard space -Neglect is more severe following right hemisphere damage -Occurs across sensory modalities -Not due to impairments in visual processing (due to something else) Clinical Assessments: These patients are assessed by neurologists 1) Line cancellation: people can only complete the tests on one half of the paper 2) Line bisection: asked to write where the middle of the line is, they put it as the middle of the [right] half of the line 3) Object Drawing : asked to draw a clock, cat, etc, they’ll draw only half of the clock, but there will be spacial rearrangements because they’ll try to put all the numbers in one half *Greatly interfere’s with daily life: patients will eat only half the food on their plate, dress only one half of their body, makeup on only one half of body Extinction: failure to report the stimuli in contra-lesional field
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  • Winter '08
  • LEVITIN
  • Parietal lobe

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