Class_05_Attention Flashcards

1
Q

Dichotic Listening Task

A
  • Attention to sound with headphones
  • Apply different sounds to each of a participant’s ears
  • Attend to one ear
  • Ignore another ear
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2
Q

Findings from Dichotic Listening Task

A
  1. Bottleneck on processing
    - only the attended signal is processed deeply
  2. Hear something important
    - own name
    - reorient attention to that signal
    - cocktail party effect
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3
Q

Visual Search Task: Feature

A

Target has single feature that doesn’t similar to the rest

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4
Q

Visual Search Task: Conjunctive

A

Target has combined (conjunctive) features from the rest

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5
Q

Feature Integration Theory

A

Dual-process that attend to visual stimuli
1. Computationally parallel process
- every item SIMULTANEOUSLY
- Single feature
2. Computationally serial strategy
- each item AT A TIME
- Conjunctive search

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6
Q

Hemispatial Neglect

A

Hemineglect
- Ignore one side of space
- middle cerebral artery stroke
- contralesional

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7
Q

Left Hemispatial Neglect

A
  • Right hemisphere middle cerebral artery stroke
  • More common
  • sit facing slightly to the right
  • head pointing slightly to the right
  • spontaneous eye movements will be mainly to the right side of space
  • Auditory: locate the sound more to the right side
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8
Q

Right Hemispatial Neglect

A
  • Left hemisphere middle cerebral artery stroke
  • Less common
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9
Q

Left Hemisphere Inferior Parietal Cortex Damage

A

Ideomotor Apraxia

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10
Q

Right Hemisphere Inferior Parietal Cortex Damage

A

(Left) Hemispatial Neglect

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11
Q

Dichotic Listening Tasks in Left Hemispatial Neglect

A

Often only report the word given
to the right ear

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12
Q

5 Exteroceptive Senses

A
  • Visual
  • Auditory
  • Tactile
  • Olfactory
  • Gustatory
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13
Q

Tests for Visuospatial Hemineglect

A
  1. drawing tasks
    - copy simple images
    - draw from memory
    - clock drawing tasks
    -> draw the right side of objects
  2. cancellation
    - Albert’s Line Cancellation Task
    - Star Cancellation Test
    -> crossed out only lines/stars on the right side of the page
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14
Q

Could disfunction of the attentional spotlight of Treisman and Gelade’s Feature Integration Theory be the cause of hemispatial neglect?

A

No.
- It’s neglected visual field
- single features that ‘pop out’ and capture attention for most people don’t appear to catch attention in patients with hemispatial neglect

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15
Q

Hemispatial Neglect & Representation of Objects

A

Left hemispatial neglect patients
1. imagine standing at a known place
- describe seeing buildings that were to their right-hand side
- neglect to describe buildings to their right
2. imagine facing the opposite direction
- described the buildings that previously neglected

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16
Q

Allocentric Neglect

A

Miss out one side of individual objects
- not the whole scene

17
Q

Egocentric Neglect

A

Miss out parts of the drawing that are to the side of their own body midline

18
Q

Allocentric Coordinates

A

Representations of space and position based on how objects are located relative to other objects.

19
Q

Egocentric Coordinates

A

Representation of space and position of objects is coded relatively to the viewer’s body

20
Q

Tests for Different Forms of Neglect

A

Apples Test
- cross out or circle all of the complete apples

21
Q

Allocentric Neglect on the Apples Test

A

Errors
- crossing out apples that have a piece missing

22
Q

Egocentric Neglect on the Apples Test

A

Correct
- apples with pieces missing are not circled/crossed
Error
- only apples to the one side of the page are marked

23
Q

Extinction to Double Simultaneous
Stimulation

A

Right hemisphere inferior parietal lobe damage
- If both the left and right stimuli appear at the same time, only one appears to be attended to
- react to stimuli to their left
- react to stimuli to their right
- vision and audition
- recovered from full neglect

24
Q

Causes of Neglect

A
  • Right inferior parietal lobule damage
  • Right hemisphere perisylvian damage
25
Q

Attention Region

A

Right hemisphere perisylvian

26
Q

Neglect Dyslexia

A

Read only one side of a whole block of text
- Left side is common
- Mostly happens with hemispatial neglect

27
Q

Egocentric Neglect Dyslexia

A

In block text, reading only words on one side of the page

28
Q

Allocentric Neglect Dyslexia

A

Consistently making errors at one side of individual words

29
Q

word-centered neglect dyslexia

A

Neglect of the right side of word
- Made errors on the right side of MIRRORED words

30
Q

Balint’s Syndrome

A

Parietal lobe damage
- Optic ataxia
- Simultanagnosia
- Oculomotor apraxia

31
Q

Optic Ataxia

A

Impaired ability to use vision to control actions in space

32
Q

Simultanagnosia

A

Inability to see two objects at the same time
- Bilateral parietal lobe damage

  • can’t recognize overlapping objects
  • can happen without Balint’s Syndrome
33
Q

Test for Simultanagnosia

A

Boston Cookie Theft picture

34
Q

Posterior cortical atrophy

A

A type of dementia affecting mainly the parietal and occipital lobes
- can cause Simultanagnosia
- slower to name objects from the BORB sets that are overlapping > individual objects

35
Q

Oculomotor Apraxia

36
Q

Simultanagnosia Vs. Integrative Agnosia

A
  1. Simultanagnosia = attentional disorder
  2. Integrative Agnosia = perception disorder
  3. Both
    - recognition problems
    - slow performance on the BORB overlapping figures test
37
Q

Integrative Agnosia

A

Can’t recognize or integrate 2 parts of an object together
- a form of apperceptive agnosia