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Summary Block 2.1 Thinking and Remembering 12,99 €
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Summary Block 2.1 Thinking and Remembering

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  • 10. juli 2023
  • 87
  • 2022/2023
  • Zusammenfassung
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Problem 1

Inattentional blindness  Failures of Awareness: The Case of Inattentional Blindness

- Inattentional blindness  Failure to notice unexpected objects or events when
attention is focused elsewhere failure of awareness
- Our perception of the world is limited
o Process only one stream of information at a time  filtering other information
from awareness  perceive only what receives our attention
- Dichotic listening
o It is a selective listening task
▪ Selective listening  method for studying selective attention 
people focus attention on one auditory stream of information while
ignoring other auditory information
o A set of headphones play two completely different speech streams  one to
each ear
▪ Task  monitor one stream while ignoring the other  attention
demanding task
▪ Result  you are deaf to the substance of the ignored speech 
won’t notice if the speaker in your right ear switches to a different
language, is replaced by a different speaker with a similar voice or the
content of their speech becomes nonsensical
● A form of cognitive deafness  due to the nature of focused,
selective attention
● Still some of limited attention to the ignored speech stream
notice big changes
o Power of attention to filter extraneous information from awareness while
letting in elements that we want to hear
- Visual analogue of the dichotic listening task
o Participants were asked to monitor one of the events failed to notice
unexpected events in the ignored video stream
▪ Unaware of events happening outside the focus of their attention

- Selective attention can induce to failures of awareness
o A variant  count passes in two teams wearing different shirt color
▪ Miss the umbrella women that passes through
- Counterintuitive findings  the displays had an odd, ghostly appearance so
researchers dismissed their implications
o Replication of Neisser´s work  findings were the same  many people
missed the umbrella woman when all of the actors in the video were partially
transparent and occupying the same space
▪ Added another thing  teams filmed with a single camera  fully
visible
● Still half the observers missed the gorilla  example of
inattentional blindness  a failure of awareness

- Factors that cause people to miss unexpected events + situations in which
inattentional blindness occurs
o Shared features

, ▪ People are much more likely to notice unexpected objects that share
features with the attended items in a display
● Example  more likely to notice the gorilla if you were
counting the passes of the team wearing black
● However unique items can go unnoticed
o Effort into the attention – demanding task
▪ Effort you put into the attention-demanding task more attention
demanding = less likely to notice the gorilla
● Due to the limited cognitive resources limits on the capacity
of attention without attention to the unexpected event you
won´t be aware of it

- Inattentional blindness in real world
o Police officer claimed not to have seen a brutal beating while chasing a murder
suspect 
▪ Experiment replicating this case
● At night 65% missed the fight and 44% in broad day light
o Auditory distractions can induce real-world failures to see (inattentional
blindness)
▪ Decreases situation awareness increases the chances that people
will miss something important
- Inattentional deafness
o The auditory analog of inattentional blindness
▪ People fail to notice an unexpected sound or voice when attention is
devoted to other aspects
o When listening to a set of spatially localized conversations over headphones
fail to notice a person walking through the scene stating “I am a gorilla”
▪ Focused attention makes us see and hear way less of the unattended
information than we think
● Focused attention affects the detection of unexpected objects
falling outside that focus
- The more like the ignored elements of a scene the less likely people are to notice
- The more distracted we are the less likely we are to be aware of our surroundings
o Under conditions of distraction we develop tunnel vision

- Individual factors
o People who have a greater working memory capacity more likely to notice
unexpected objects
▪ More resources available when focusing attention more likely to
spot other aspects of their world
▪ Controversial other studies find no such relationship
o Theoretical reasons to predict each pattern
▪ With more resources available people should be more likely to
notice
● However people with greater working memory capacity
better able to maintain their focus on their prescribed task
= they should be less likely to notice
o The ability to perform a task does not predict the likelihood of noticing

, - These findings run counter our intuitions counterintuitive
o We think we see and remember far more of our surroundings than we actually
do that is what makes it counterintuitive
o Why do we have a mistaken intuition?
▪ Our experiences mislead us
● Rarely forced to confront something that we missed
unaware of what we have missed but fully aware of those
elements of a scene that we have noticed we assume our
experiences are representative of the state of the world

Selective attention

- Cocktail party problem
o Process of tracking one conversation in the face of the distraction of other
conversations
- Shadowing
o Task to study selective attention in which you listen to two different
messages
▪ Dichotic presentation separate message to each ear
● Repeat back only one of the messages as soon as possible
after you hear it follow just one message
▪ Shadowing required a significant amount of concentration but
participants were quite successful in shadowing distinct messages in
dichotic-listening tasks
● They notice physical, sensory changes in the unattended
message but not a language shift or when the message is
presented backwards
o When their name was presented switch attention
to their name
▪ Those who hear their name in the unattended
message have limited working-memory
capacity  easily distracted –or not?...

- Factors that help you selectively attend only to the message of the target speaker
o Distinctive sensory characteristics of the target’s speech
▪ Example high vs. low pitch, pace, etc.
o Sound intensity loudness
o Location of the sound source
▪ Spatial cues are less important than factors like how harmonious and
rhythmic the target sounds

Theories of selective attention

- Filter theories and bottleneck theories
o Filter blocks some of the information going through and thereby selects
only a part of the total of information to pass through to the next stage
o Bottleneck slows down information passing through

- Broadbent´s Model
o Filter information right after we notice it at the sensory level

, o Multiple channels of sensory input reach an attentional filter
▪ The filter permits only one channel of sensory information to proceed
and reach the processes of perception  that is when we assign
meaning to our perception
▪ Other stimuli filtered out at the sensory level and may never reach
the level of perception
▪ Sensory information sometimes may be noticed by an unattended ear
if it does not have to be processed elaborately
● Information requiring higher perceptual processes is not
noticed if not attended to

- Selective Filter Model (Moray)
o Even when participants ignore most other high-level aspects of an unattended
message they recognize their names Broadbent´s model must be wrong
▪ Messages that are of high importance may break through the filter of
selective attention
● Selective filter blocks out most information at the sensory
level some personally important messages burst through
the filtering mechanism
- Attenuation Model (Treisman)
o Experiment participants shadowing coherent messages at some point
switched the remainder of the coherent message from the attended to the
unattended ear they had been somehow processing the content of the
unattended message
o Findings suggested that at least some information about unattended signals is
being analyzed
▪ Theory of selective attention that involves a later filtering mechanism

● Instead of blocking stimuli out filter merely attenuates the
strength of stimuli other than the target stimulus
o When the stimuli reach us we analyze them at a low
level for target properties like loudness and pitch
o If the stimuli possess those target properties we
pass the signal on to the next stage
o If they do not we pass on a weakened version of the
stimulus
● Then perceptually analyze the meaning of the stimuli and
their relevance to us message from the unattended ear can
come into consciousness and influence our subsequent
actions
- Late – Filter Model (Deutsch and Deutsch)
o The location of the filter is even later
▪ Stimuli are filtered out only after they have been analyzed for their
physical properties and their meaning people would be able to
recognize information entering the unattended ear
▪ Recognize their names or a translation of what they hear on the
attended ear

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