Attention Flashcards
What is attention?
- “Everyone knows what attention is …. It implies withdrawal from some things in order to deal effectively with others, and
is a condition which has a real opposite in the confused, dazed, scatterbrained state which…is called distraction” - William James - Attention is best understood in terms of what it does rather than what it is
What are types of attention?
- top down attention
- bottom up attention
- arousal
What is top down attention?
- observer guided controlled attention
- frontal parietal brain regions
- a goal or target in mind directs your attention
- voluntary attention
- controlled, preparing to attention and setting goals
What is arousal?
- alertness and awareness
- autonomic nervous system, reticular activating system
- physiologically based
What is bottom up attention?
- stimuli guided automatic attention
- physical stimuli and salience
- purely guided by external factors
- automatic attentional orienting
What are the neural mechanisms of attention?
- a network of regions across frontal and parietal lobes
What brain regions are used for top down attention?
- intraparietal sulcus / intraparietal lobule
- frontal eye fields
What brain regions are used for bottom up attention?
- temporoparietal junction
- ventral frontal cortex
What is attentional shift?
- shift between attending to image vs sound
What are the types of divisions of attention?
- endogenous attention
- exogenous attention
What is endogenous attention?
- when an individual chooses what to pay attention to (goals and intention)
- top down processing
- intraparietal sulcus and frontal eye fields
What is exogenous attention?
- when stimuli in the environment drives us to pay attention
- bottom up processing
- temporoparietal junction and ventral frontal cortex
What is spatial neglect?
- damage to the right hemisphere, ventral parietal cortex
- deficits in spatial attention and egocentric representations in contralateral field of view
- cannot attend or report stimuli on opposite side of legion
- cannot see things on left side
- is not just about vision, if blindfolded will also have problems searching for objects on the left side of the table
What can be done to help with spatial neglect?
- severity can be modulated by behavioural interventions over very short timescales
- training to increase alertness
- ask to perform hand movements to neglected side
- only lasts a small amount of time
This brain region would be engaged when you are actively searching for a black car in a crowded lot, this would make black cars more salient in the visual system.
a. Reticular Activating System
b. Frontal Eye Fields
c. Temporal Parietal Junction
d. PNS
b
What are the types of attention in top down attention?
- sustained attention
- divided attention
- selective attention
What is sustained attention?
- maintain focus on one input for a long period of time
- vigilance
- the ability to focus on one task
- concentration
What is divided attention?
- shifting attentional focus between tasks
- multi tasking
- the ability to attend to more than one task
- task switching
What is selective attention?
- focus on one input and ignore other information
Why do we have selective attention?
- we have limited information processing resources
- must prioritize what to process
- this will depend on goal (what you want to attend to)
What are the theories of selective attention?
- early selection filter models
- attenuator
- late selection filter models
- load theory
What is Broadbent’s early selection filter model?
- you filter information at the level of perception, before information is processed for meaning (semantic analysis)
- select information via perception (spatial location, frequency of sound)
- selected information is processed for meaning, enters awareness
- information nit selected by the filter decays and is not processed for meaning
sensory buffer -FILTER-> perceptual analysis –> semantic analysis (short term memory) –> responses
What proof is there for the early selection model?
- dichotic listening tasks
What is the dichotic listening task in the early selection model?
- present two different simultaneous messages to each ear
- participants better to recall ear by ear than the simultaneous message (they will remember the info from the hear they are paying attention to)
- conclusion: information is selected for attention at perception
- shadowing task (repeat info from attended ear)
- people do not remember the content of an unattended message, but they notice some sensory features (new noise, gender of speaker)
- evidence that unattended information is not processed for meaning but perception
What is the evidence against early selection?
- in certain situations, unattended information can break through
- at a party, you can attend to one conversation, yet hear your name spoken in a non-attended to conversation
- participants presented with a word paired with a shock
- shadowing task with the socked word in the unattended ear
- increased skin conductance when the shocked word was presented in the unattended ear
You are studying for your Cognition exam and your roommate is watching TV in the next room, which you are ignoring. According to early selection models, what property of the TV show would you most likely encode?
a. You would not encode anything you are ignoring
b. You would encode whether the actor speaking is male or female
c. You would encode everything that enters your sensory memory
d. You would encode what the actors are saying
b
What is Treisman’s attenuator model?
- an early filter dials down the influence of unattended material
- some aspects of unattended material to be processed for meaning
- dampen down unattended material but if meaningful will hear it
sensory inputs –> feature discrimination –> short term store – information passes, but some of it is weaker –> analysis of meaning (includes context) –> response
What is the late selection filter model?
- we process input to the level of the meaning, and then select what we want to process further
sensory buffer –> perceptual analysis –> semantic analysis (short term memory) -FILTER-> responses
What proof is there for late selection models?
- stroop task
What is the stroop task?
- names of colours, in different coloured ink
- name the colour of the ink
- difficulty naming colour when the word doesn’t match
- controlled vs automatic tasks
- takes longer to name the colour of the ink in incongruent trials
- for the interference effect to occur, you must process the written colour name (unattended information) for the meaning
What are controlled tasks?
- those that require effort and voluntary top down attention
- naming the colour of the ink in the stroop task
What are automatic tasks?
- those that are highly familiar and well practiced and do not require voluntary top down attention
- reading the colour names in the stroop task
What happens when the automatic processing is removed in the stroop task?
- hypnotized english speaking participants to think colour names were meaningless
- removes the automatic processing of meaning of the words
- result: no stroop interference effect
What is the load theory?
- attentional filtering (selection) can occur at different points of processing
- filter placement will depend on how much of your resources are required for your current task
- if low resource load, we process non attended information to a later stage
- if high resource load, we process non attended information only to an early stage
Hoe much information will be processed while doing a difficult task with a high load, according to load theory?
- we process al information (relevant or irrelevant) only to the level of perception
- our attention is selected early
- focused attention
- early filter
Hoe much information will be processed while doing an easy task with a low load, according to load theory?
- we process all information (relevant or irrelevant) to the level of meaning
- our attention is selected later
- process irrelevant information for meaning
- late filter
What are the two ways to define load?
- central resource capacity view
- multiple resource capacity view
What is central resource capacity view?
- one resource pool from which all attention resources are allocated
- driving stimulator task under two conditions
- low auditory load, driving with no radio: saw the elephant
- high auditory load, driving and listening to the radio: did not see the elephant
What is multiple resource capacity view?
- Multiple resources from which attention resources are allocated
- Attentional load depend on the match between the relevant and irrelevant information
- Attentional capacity is reached sooner if relevant and irrelevant information are from the same modality
- listen to people speaking
- low load: determine if the words spoken in a loud or quiet voice
- high load: listen for bisyllabic words among mon and tri syllabic words
- presented visual distractors
- there was difference in processing between load conditions
According to multiple resource capacity, f you are driving and need to get directions, would you have more problems paying attention to the road if listening to a set of directions or viewing it on your phone?
Viewing it on your phone
What is the proof for load theory?
- the flanker task
What is the flanker task?
- task: press a designated (separate) key if there is an X or N in the centre circle display
- people are more distracted by the flanker in a low load condition, longer reaction time
The fact that I can listen to music (sounds) and this does affect my ability to do puzzles (visual) fits with which theory of attention?
a. attenuator model with a multiple resource capacity view
b. attenuator model with a central resource capacity view
c. load theory with a multiple resource capacity view
d. load theory with a central resource capacity view
c
What is change blindness?
- the failure to detect changes in stimuli
- continuity errors in film
- not necessarily where you’re paying attention to
How is change blindness measured?
- flicker technique paradigm
What is the flicker technique paradigm?
- two similar visual images are presented with an interstimulus mask (grey screen)
- across trials, small changes are made to the images
- participants asked if something changed between the images
- people are inaccurate
What is inattentional blindness?
- not noticing something new in your focus of attention
- a failure to attend to new or unexpected events in attended to environment
How is inattentional blindness measured?
- participants learn to focus attention to a particular space then an unexpected target is presented in that space
- participants determine which cross arm is longer
- many participants did not see a small white square appear next to the cross
- if word appears and they are asked to fill out the word (arm___), they will more likely complete it with what was presented during a period of inattentional blindness even without knowing it
An experiment is run in which, across trials, two identical or similar visual images are presented with a short “mask” between. Participants are asked to determine if there are differences among those images for each trial. The researchers found that the participants were quite _______ at detecting differences among the similar visual images and interpreted this is as a measure of ____________.
a. Inaccurate; Change Blindness
b. Accurate;ChangeBlindness
c. Inaccurate; Inattentional Blindness
d. Accurate; InattentionalBlindness
a
What are functions of and ways to measure attention?
- pre activating attention and the Posner spatial cuing task
- integrating features and visual search
- embodied theories of attention and measuring eye movements
What is activating attention?
- Posner’s attentional spotlight theory
- attention is about focusing on space and ignoring what is located outside of the focused space
- when moving attentional spotlight, disengage from current focus and shift to another area
- attention for pre activating processing shifts
What is Posner cuing task?
- measure of spotlight theory
- fixation display: fixate on the centre of a screen
- cue display: a space directs attention to an area
- target display: reaction time to detect the target is measured
- valid trial” target appears in the same location as the cue
- invalid trial: target appears in a different location as the cue
- reaction time to valid trials are faster than to invalid trials
- but a long enough SOA means results flip
What is stimuli onset asynchrony (SOA)?
- the time between the cue and the target
- short time interval, less than 200 ms
- long time interval, around 300 ms
- different results for short and long SOA
- when there is a long SOA, we are faster during invalid trials because of inhibition of return
What is inhibition of return?
- attention is inhibited from going to a recently attended space after a ling duration between space cue and target
- is it adaptive, helps us search our environment efficiently