Attention Flashcards
Attention is:
Goal Directed
Deployed to achieve something
Type of search
Visual search
Type of visual search:
Pop out search: fast, effortless
Serial search: slow, effortful
Shifted attention?
Spotlight metaphor
Start left move right
Attention and eye movement coupled
But not Posner Task
Attention zoomed
The zoom lens metaphor
Attention selective
Attention as a filter
Miss friend with blonde hair when looking for friend with red hair
Attending to one thing means not attending to other thing
Characteristics of attention
Shifted Zoomed Selective Limited Captured Divided
Attention limited
Attention as a resource
Listening to 2 people at same time
“Run out of attention”
Attention captured
Control attention to a degree
Search friend red hair, never sits in first row
Attention still altered by other red haired students in first row
Attention divided
Between modalities
Modern attention research:
Donald broadbent
Cherry
Air traffic control
Attention demanding
Multiple pilots talking at same time
Broad bent: understand 2 simultaneous messages
Broadbent task and Result
Relevant call sign baron
No spatial separation of speakers
50% q’s answered correctly
V, difficult even with limited number of alternatives
Cherry Cocktail Party Problem
How do we recognise what one person is saying when others are speaking at the same time
Spatial separation of speakers
Conditions of cocktail party problem and result
Condition 1: two messages by same speaker played to both ears
Hear both messages in both ears
Result: v difficult but possible after many repetitions
N=1
Shadowing
Repeat one, ignore the other
Cocktail party problem, condition 2 and result:
Two messages by the same speaker simultaneously played to different ears
Result: much easier, able to attend to 1 ear
Dichotic listening
Hear one message in left ear and other in right ear
What happens to irrelevant message?
No words or semantic content reported
Change in language not noticed
Reversed speech sometimes recognised
Change from male - female or to pure tone recognised
Basic physical stimulus characteristics processed
Conclusion from attention experiments:
Attend to 2 messages not separable by physical cues
Same speaker and ear
V hard
Attend to 1 message and know little about other
Broadbents Filter Theory
Meaning of irrelevant information is not analysed
Senses, short term store, selective filter, limited capacity channel (p system), store of conditional possibilities of past events, system for varying output until some input is secured
Effectors
Broadbents filter theory:
Short term store
Sensory register/ buffer
Immediate memory
Iconic/echoic memory
Parallel processing of simple physical stimulus properties (location, pitch, intensity)
Filter
Selects info for further processing
Basis for selection
Physical stimulus properties in short term store
The limited capacity channel
Serial processor (one thing at a time)
E.g. Analysis of word meaning
Focus of attention on working memory
What kind of selection theory is broadbents theory?
Early selection
Why is broadbents theory an early selection theory?
Selection/filtering occurs before stimuli are identified and analysed
Own name effect
Moray shadowing task
1/3 of ppts notice own name in irrelevant channel
What does own name effect require?
Processing beyond basic physical stimulus characteristics, meaning of irrelevant info WAS analysed
Own name effect also called
Cocktail party effect
Evidence against early selection theories
Own name effect Channel switching Electric shocks Attenuation theory Late selection theory
Channel switching and results
Treisman Participants may briefly Switch ears when messages switched (upper case= shadowed) 18 subjects Results: 3 never switched, 15 did Meaning of irrelevant info WAS analysed
Electric shocks and result
Phase 1: words paired with electric shocks
Phase 2: words presented with irrelevant channel
Result: words affect skin conductance responses
Attenuation Theory
Treisman
Filter not completely selective
Some concepts in mental dictionary more readily available (e.g. Own names)
Relatively weak signal sufficient to activate these concepts
Late selection
Deutsch and deutsch
Meaning analysed before filter
Processing of perceptual only is automatic (not under voluntary control) and not capacity limited (everything analysed)
Why is irrelevant information sometimes processed?
Leakage
Slippage
Spillover
Input modality
Visual attention
Auditory attention
Cross modal attention (more than one modality)
Number of relevant Input streams
One: focused attention
More: divided attention
What is attended?
Spatial attention
Feature based attention
Object based attention