Visual attention & perception in-depth
15 important questions on Visual attention & perception in-depth
What is remarkable about the stroop task?
What is remarkable for the attentional blink task?
- Smaller attentional blink when second item is a negative word
How can you measure prioritisation using attentional orienting? What are the results?
1. Fixation
2. Cue (angry vs happy etc.)
3. Mask
4. Valid of invalid probe
5. Was this probe left or right?
Reponse times measured as function of the cue
Results: Fearful faces reliably attract attention
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How do you measure prioritisation using binocular rivalry? What are the results?
Competition in awareness.
Results: Fearful faces reliably dominate consciousness
What are 3 tests we can use to measure the influence of emotion on perceptual prioritization?
- Binocular rivalry
- Breaking continuous flash suppresssion
How do we measure perceptual prioritisation using breaking continuous flash suppression? & breaking continuous flash suppression?
Breaking: 1 face left of fixation 1 right --> Which one did you see first
This is an access to conscious awareness
Prioritised awarenss of fearful faces
What is binocular dispartity? & fusion & Binocular rivalry?
Fusion: 2 images fuse
Rivarly: Not fused, perception alters
Why is the evidence for threat prioritization often overstated?
- Evidence for other stimuli is mixed (depends on paradigm & task)
Fear has an advantage in threat prioritisation. Why is this effect difficult to interpret this way?
- Do these go hand in hand?
- What are the neural mechanisms (visual or amygdala driven?)
To what types of faces do face-selective neurons give an enhanced response? How does this effect happen in the brain?
- Feedback amygdala connections modulate visual responses to emotional stimuli
What are the 4 brain mechanisms for emotional enhancement?
2. Affective salience: Attention networks
3. Subcortical "low road" bypassing cortex
4. Sensory "low-level"
(slide 311 is best belangrijk denk ik(
What happens to visual cortex activity if there is hippocampus damage & amygdala damage?
What is visual neglect & where is the damage?
Damage in right hemisphere (parietal lobule)
- Neglect for objects on the left side
What should the low road of visual information be insensitive to? Is this true?
- Magnocellular cells in superior colliculus can only process coarse but not fine information.
True true.
According to amygdala activation, is there unconscious processing of emotions?
- Strongly respond to invisible fearful faces vs invisible chairs.
- Responses to task-irrelevant fearful faces
No
- Amygdala responses to fearful faces can be strongly influences by attention
- No fear effect under high load: Against strong automacity
- Fear effect under low load is strongly modulated by state anxiety
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