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A power point presentation of Attention and Consciousness from the book: Discovering Cognitive Psychology; 5th Edition
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ATTENTION & CONSCIOUSNESSGROUP 4
“Attention is the taking possession of the mind, in clear and vivid form, of one out of what seem several simultaneous possible objects or trains of thoughts.. It implies withdrawal from some things in order to deal effectively with others.”
- William James
ATTENTION
• The means by which we actively process a limited amount of information from the enormous amount of information available through our senses, our stored memories and our other cognitive processes
• Includes both conscious and unconscious processes
• Allows us to use our limited mental resources judiciously.
• Dimming the lights on many stimuli form the outside and the inside to highlight one that interests us.
CONSCIOUSNESSAccording to John Locke, consciousness is “the perception of what passes in a man’s own mind.”
From the Latin phrase “conscius sibi” which means “knowing with oneself”
\ Consciousness is the state of being awake and aware of one’s surrounding.
Attention and Consciousness form two partially overlapping sets
BENEFITS OF ATTENTION•Helps in monitoring our interactions with the environment•Assists us in linking our past and present to give a sense of continuity of experience•Helps us in controlling and planning for our future actions
PRECONSCIOUS PROCESSES
Processing information that exist at the preconscious level of awareness.
PRECONSCIOUS INFORMATION• STORED MEMORIES• SENSATIONS
PRECONSCIOUS PROCESSING
PRIMING occurs when a recognition of certain stimuli is affected by prior presentation of the same or similar stimuli.
• Positive Priming• Negative Priming• Visual Priming• Aural Priming
Sometimes, pulling preconscious information into consciousness is not easy.
PRECONSCIOUS PROCESSING
Tip-of-the-Tongue phenomenon
CONTROLLED vs AUTOMATIC
CONTROLLED vs AUTOMATIC
• Concealed from consciousness• Unintentional• Consume few attentional resources
3 Attributes characterizing
automatic processes
Characteristics Controlled Processes
Automatic Processes
Amount of intentional effort
Require intentional effort
Require little or no intentional effort
Degree of conscious awareness
Require full conscious awareness
Generally occur outside of conscious awareness although some may be available for consciousness
Use of attentional resources
Consume many attentional resources
Consume negligible attentional resources
Type of processing Performed serially Performed by parallel processing
Speed of processing Relatively time-consuming
Relatively fast
Relative novelty of tasks
Novel and unpractised tasks
Familiar and highly practised tasks
Level of processing Relatively high levels of cognitive processing
Relatively low levels of cognitive processing
Difficulty of tasks Usually difficult tasks Usually easy tasks
Process of acquisition With sufficient practise, many routine and relatively stable procedures may become automatized
AUTOMATIZATION is the process by which a procedure changes from being highly conscious to being relatively automatic.
HOW? By PRACTISE
CONTROLLED vs AUTOMATIC
A widely accepted view of automatization has been that during the course of practise, implementation of the various steps become more efficient
People consolidate various discrete steps into a single operation.
CONTROLLED vs AUTOMATIC
INSTANCE THEORYAutomatization occurs because we gradually accumulate knowledge about specific responses to specific stimuli.
Instance theory explain specific responses to specific stimuli while the prevailing view explain more general responses involving automatization.
CONTROLLED vs AUTOMATIC
1. MISTAKES - errors in choosing an object or in specifying a means of achieving it.
2. SLIPS - errors in carrying out an intended means for reaching an object.
CONTROLLED vs AUTOMATIC
CLASSIFICATION OF ERRORS
KINDS OF SLIPS1. When we must deviate from a routine and
automatic processes inappropriately override intentional, controlled processes
2. When we are interrupted
Type of Error Description of Error
Capture Error When in need to deviate from a routine in a familiar surrounding but we fail to pay attention and to regain control of the process AP capture our behavior.
Omission* An interruption may cause us to skip a step or two in doing the routine
Perseveration* After an automatic procedure has been completed, one or more step may be repeated.
Description Error
A description leads to performing the correct action on the wrong object.
Data-driven Error
Incoming information may end up overriding the intended variables in automatic action sequence.
Associative-activation Error
Strong association may trigger the wrong routine
Loss-of-activation Error
Activation of routine may be insufficient to carry it through completion
HOW CAN WE MINIMIZE THE POTENTIAL FOR NEGATIVE CONSEQUENCES OF SLIPS?
If we receive appropriate feedback from the environment particularly the kind of feedback which involves forcing function. Forcing functions are physical constraints that make it difficult or impossible to carry out an automatic behavior that may lead to a slip.
CONTROLLED vs AUTOMATIC
HABITUATION and ADAPTATION
HABITUATION involves our becoming accustomed to a stimulus so that we gradually pay less and less attention to it.DISHABITUATION involves a change in a familiar stimulus which prompts us to start noticing the stimulus again.
SENSORY ADAPTATION is a lessening of attention to a stimulus that is not subject to conscious control.
ADAPTATION HABITUATION
Not accessible to conscious control
Accessible to conscious control
Tied closely to stimulus intensity
Not tied very close
Unrelated to the number, length, and recency of prior exposures
Tied very closely to the number, length, and recency of prior exposures
HABITUATION and ADAPTATION
DIFFERENCES SENSORY ADAPTATION AND HABITUATION
1. Stimulus internal variation2. Subject arousalAROUSAL is a degree of psychological excitation, responsivity, and readiness for action, relative to a baseline.HOW? In terms of:• rate• Blood pressure• EEG patterns• Neural responses
HABITUATION and ADAPTATION
FACTORS that INFLUENCE HABITUATION
MAIN FUNCTIONS OF CONSCIOUS ATTENTION
1. Signal detection and vigilance2. Selective attention3. Divided attention4. Search
FUNCTION
DESCRIPTION
Signal detection and vigilance
Waiting for signals to show
Selective Attention
Choosing signals to attend to
Divided Attention
Engaging in more than one task
Search Seeking out
SIGNAL DETECTION THEORY
FOUR POSSIBLE OUTCOMESHit
MissFalse Alarm
Correct Rejection
SIGNAL DETECT A SIGNAL
DO NOT DETECT A SIGNAL
Present Hit Miss
Absent False Alarm Correct Rejection
Covered in the: 1) context of attention, 2) context of perception, and 3) context of memory
1. Whether one is paying enough attention to perceive objects that are there
2. Whether one is able to perceive faint signals that may or may not be beyond one’s perceptual range
3. Whether one indicates one has or has not been exposed to a stimulus before
SIGNAL DETECTION THEORY
VIGILANCE
Vigilance - A person’s ability to attend to a field of stimulation over a prolonged period, during which the person seeks to detect the appearance of a particular target stimulus• Needed in settings where a given stimulus
occurs only rarely but requires immediate attention
• Highly localized and strongly influenced by expectation
• Involves the speed and accuracy of detecting a target stimulus
SEARCH
•Scan the environment for particular features•Whereas vigilance involves passively waiting for a signal stimulus to appear, search involves actively seeking out the target
Distracters•Nontarget stimuli that divert our attention away from the target stimuli•Can cause false alarm
Search
2 KINDS OF SEARCH
1. Feature search•When we can look for some distinctive features of a target we simply scan the environment for those features
2. Conjunction search•We look for a particularcombination of features
SEARCH
• Each of us has mental map for representing the given set of features for a particular item (shape, size, color features)
• During feature searches we monitor the relevant feature map for the presence of any activation in the visual field
• During conjunction searches, we can simply use the map of features, we must conjoin two or more features into an object representation at a particular location
SEARCH
Feature-Integration Theory (Anne Treisman)
Similarity theory (Duncan and Humphreys)
As the similarity between target and distracter increases, so does the difficulty in detecting the target stimuli
Factors influencing search1. DEGREE OF SIMILARITY - Similarity
between the target and the distracters2. DEGREE OF DISPARITY - Similarity among
distracters
SEARCH
All searches involve two consecutive stages• Parallel stage – simultaneous activation of
all the potential targets• Serial stage – sequential evaluation of
each of the activated elements
SEARCH
Guided search theory (Cave and Wolfe)
Movement-Filter theory(McLeod at al.)
• Movement-filter – can direct attention to stimuli with a common movement characteristics
• Movement can both enhance and inhibit visual search
SEARCH
Selective Attentionthe process by which a person can selectively
pick out one message from a mixture of messages occurring simultaneously.
BASIC PARADIGMS• Cocktail Party Problem (Colin Cherry, 1953)
- the process of tracking one conversation in the face of the distraction of other conversations.
• Shadowing- listening to two different messages but
are able to follow only one message & ignore the other.
• Binaural Presentation- Presenting the same two messages or sometimes just one message to BOTH ears simultaneously.
• Dichotic Presentation- Presenting different message to EACH ear.
SELECTIVE ATTENTION
3 Factors to Selectively Attend The Desired Speaker’s Message
(Brungard & Simpson, 2007)
• Distinctive sensory characteristics of the target speaker’s speech
• Sound intensity• Location of the sound source
SELECTIVE ATTENTION
FILTER & BOTTLENECK THEORIES• Broadbent’s Model
- we filter information right after it is registered at the sensory level.
SELECTIVE ATTENTION
•Moray’s Selective Filter Model
- The selective filter blocks out most information at the sensory level. But some highly salient messages are so powerful that they burst through the filtering mechanism.
SELECTIVE ATTENTION
• Treisman’s Attenuation Model- We preattentively analyze the physical properties of a stimulus (stimuli with target properties)
- We analyze whether a given stimulus has a pattern, such as speech or music
- We sequentially evaluate the incoming messages, assigning appropriate meanings to the selected stimuli messages
SELECTIVE ATTENTION
• Deutsch and Deutsch’s Late Filter Model
- the signal-blocking filter occurs later in the process. It has its effects after sensory analysis. It occurs after some perceptual and conceptual analysis of input had taken place.
SELECTIVE ATTENTION
SELECTIVE ATTENTION• Multimode Theory
-Attention is flexible
INFORMATION PROCESSING OCCURS IN 3 STAGES1. The individual constructs sensory
representation of stimuli.2. The individual constructs semantic
representations.3. The representations of stages 1 & 2 become
conscious
SELECTIVE ATTENTION
• Neisser’s Synthesis
2 Processes Governing Attention•Preattentive (rapid, automatic, parallel)•Attentive processes (controlled, occur later, serial)
Attentional-Resource Theories of Selective Attention
• Help to explain how we can perform more than one attention - demanding task at a time.
• We have attentional resources specific to a given modality
SELECTIVE ATTENTION
Listen to
music
Listen to the news
station
Concentrate on writing
Having difficulty doing task 2 &
the activity selected
simultaneously
Auditory Visual
Listening to music
Writing
Wouldn’t pose serious
attentional difficulties
A B
Additional Considerations in Selective Attention
1. Overall arousal2. Specific interest in a target task and stimuli,
compared with interest in distracters3. Nature of the task4. Amount of practice in performing a given
task or set of tasks5. Stage of processing at which attentional
demands are needed
SELECTIVE ATTENTION
The Stroop Effect• By John Ridley Stroop (1935)• Demonstrates the psychological difficulty in
selectively attending the color of the ink and trying to ignore the word that is printed with the ink of that color
SELECTIVE ATTENTION
Why the Stroop test may be particularly Difficult?
• Because most other adult & for you, reading is now an automatic process. It is not readily subject to your conscious control
You find it difficult intentionally to refrain from reading and instead to concentrate on identifying the colour of the ink, disregarding the word printed in that ink colour.
SELECTIVE ATTENTION
SELECTIVE ATTENTIONOther stroop effect
COGNITIVE NEUROSCIENTIFIC APPROACH TO ATTENTION AND CONSCIOUSNESS
Is attention a function of the entire brain, or is if a function of discrete attention-governing modules in the brain?
COGNITIVE NEUROSCIENTIFIC APPROACH
1. Alertingttttttiing2. Orienting3. Executive attention
THREE SUBFUNCTIONS OF ATTENTION
• An attentional dysfunction in which participants ignore the half of their visual field that is contralateral to the hemisphere of the brain that has a lesion.
• Due to unilateral lesions in the parietal lobes.
COGNITIVE NEUROSCIENTIFIC APPROACH
SPATIAL NEGLECT
• Anterior attention system – during task requiring awareness/attention for action
• Posterior attention system – during task involving visuospatial attention
COGNITIVE NEUROSCIENTIFIC APPROACH
ATTENTIONAL SYSTEMS
EVENT-RELATED-POTENTIALS (ERPs) indicate minute changes in electrical activity in response to various stimuli.
COGNITIVE NEUROSCIENTIFIC APPROACH
USING EVENT-RELATED POTENTIALS TO MEASURE
ATTENTION
This approach evaluates changes in attention and consciousness associated with various chemicals, hormones, and even CNS stimulants and depressants.
PSYCHOPHARMACOLOGICAL APPROACH
Antony Marcel (1983)• Participants had to classify series of
words into various categories• Primes where words with two meanings
such as palm followed by target word (tree or hand)
• Task outline:Prime – PALMTarget – TREE
- If the participant was consciously aware of seeing the word “palm”, the mental pathway for only one meaning was activated
- If the word “palm” was presented so briefly that the person was unaware of seeing the word, both meanings of the word appeared to be activated
KEY THEMES
1. Respective roles of structures and processes.
2. Relation between biology and behavior.
3. Validity of causal inferences vs ecological validity.
KEY THEMES
PAM
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