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Flashcards in extra cogni Deck (8)
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1
Q

feature integration theory

> what happens in preattentive state

> what happens in focussed attention?

A

preattentive state: features percieved seperately

focussed attention: features combined

2
Q

how to use the staircase method when making use of adaptive testing?

A

present stimuli

> stimulus intensity is decreased when stimulus is perceived

> stimulus intensity is increased when stimulus is not perceived

3
Q

when calculating the difference threshold, what values are used? why?

A

difference threshold:

> average 25% and 75% values

> do not use 0% and 100%, because performance is never optimal

4
Q

the pupillary light response depends on what 3 factors?

A
  1. whether you are aware of the stimulus
  2. whether you are paying attention to it
  3. whether you are thinking about it
5
Q

4 reasons to use reaction time in experiments

A

why use reaction time:

  1. permits studying the syste when it is functioning well
  2. the time to initiate a response may be a more sensitive indicator of the underlying process than which response is chosen
  3. RTs are good at revealing the temporal organization of mental processes
  4. data suggests that RTs are informational
6
Q

what is a difference in deviance in fast and slow saccades?

A

fast saccades: more frequently towards distractor

slow saccades: more frequently away from distractor

> enough time for top-down control

7
Q

trajectory deviation

> what happens when distractor is close to target?

A

distractor close to target:

> target AND distractor show activation peak

> those combine spatially somewhere in the space between target and distractor

> saccade deviates towards distractor

8
Q

trajectory deviation

> what happens when distractor is far away?

A

distractor far away

> distractor activity peak gets inhibited

> inhibition area overlaps partly with activiation from target, skewing the peak away from distractor

> saccade deviates away from distractor