Final Flashcards
What is cognition? types of cog research (2)
Basic research: understanding w/o use (learning/normal functioning)
Applied research: solution to problems (better understanding & diseases/disorders)
Ways to study cognition (2)
Hypothesis based research
Phenomenon based research
Approaches & uses (cognition) (3)
Cognitive psychology: behavior to understand minds (ex: emotional enhancement effect)
Cognitive neuroscience: linking brain to mind (ex: amygdala to predict emotional response)
Computational modeling: modeling the brain-mind connection (ex: tracing the path & modeling it)
Plato
Plato
- Rationalism: knowledge from observation & prior reasoning
- World: reflection of our reality, not objective
Aristotle
Aristotle
- Empiricism: knowledge from observation only. Though is association from observations
Structuralism
Systematic observation to understand structure of mind.
Self reporting - Unreliable
*Wilhelm Wundt
Criticisms: simplistic + subjective
Functionalism
Why does the mind work?
Cognition -> function
*William James
- believed conciousness is personal & dynamic
- eclectic approach
Criticisms: difficult to study
Behaviorism
Classical conditioning: Pavlov
Instrumental learning: Thorndike
Operant conditioning: Skinner
Criticisms: cant account for complex behavior, learning is not the same across individuals
Hick’s Law
More uncertainty > longer processing
Overload bias & decision fatigue
Cognitive revolution
50s, internal mental state
Aim to understand processesA
Assumptions of cognitive research
- Mental processes exist
- They can be studied scientifically
- We are active info processes
- Basis of mental processes in the brain
EEG
EEG: Electrical activity from ERPs
Bad spatial resolution
Good temporal resolution
MRI
MRI:
Good spatial resolution
Bad temporal resolution
fMRI
fMRI:
functional, Mesures via oxygenated blood
CNS + PNS (2 parts)
CNS: voluntary
PNS: involuntary
- somatic system - conscious
- autonomic system - unconscious
> sympathetic : alert
> parasympathetic : relaxation
Behavioral neuroscience
Neural basis of action
Pro: causal link between brain + behavior
Cons: no info about cognition animalistic structures differ
Behavioral measurements
Behavioral experiments -> voluntary
Psychophysiological measurements -> involuntary
TMS
Stimulation: non invasive
Good to test causality
Might improve memory
Hand to localized effects
Dualism
- Interactionism
- Epiphenominalism
Dualism: mind + brain are separate
Interactionism: soul, each affect ther other
> descartes
Epiphenominalism: physical effect mental, mental does not effect physical
> Luxley: like steam off a train
Monism
- Idealism
- Neutral Monism
- Materialism
Monism : mind + brain are one entity
Idealism: reality is a mental construct
Neutral Monism: underlying nature = neutral 3rd thing
Materialism: reality is due to physical processes
Cognitive neuroscience
Neural basis of cognition
Use neuroimaging techniques
Split brain patients: dual consciousness?
Exteroceptive vs interoceptive sensation (3 for interoceptive)
Exteroceptive: sensation outside body
Interoceptive: sensation from inside body
> proprioception - spatial
> nociception - pain
> equilibrioception - balance
Synesthesia
Cross-talk
chromesthesia: sound > color (like me)
illustrates individuality is psychology
McGurk effect
You hear what you see
One sense influence another
Visual system dominance
Visual Processing steps (early vs late)
Early: light > photoreceptors > RGCs > opticnerve
-> thalamus ->
Late: V1 > … > V5 > visual association areas
- Dorsal : Where, impaired guided motion
- Ventral: What, impaired recognition/matching
Constructivist theory of perception
We use what we know to help percieve reality
Illusions via prior knowledge & expections
Touch pathway, olfaction pathway, taste pathway
Touch: mechanoreceptors > spine > soma-sensory
Olfaction: olfactory epithelium > olfactory bulb
- DIRECT communication
Taste: taste buds > palate > pharynx > upper esophagus > thalamus > primary gustatory cortex
Gestalt psychology (5 principles)
to deal with ambiguity, principles of:
1. experience: ie. figure ground segmentation
2. proximity: close = together
3. Closed forms
4. Good contour: if they are expected to continue we perceive them as continuous
5. Similarity
Direct Models (what are affordances?)
AGAINST top-down perception
sensory infro is rich enough
* J.J Gibson
Affordances: links cues to function (button “affords” pushing)
Blindsight
V1 damage
No explicit perception in that area
Yes implicit perception
Visual info is first processed implicity
Where pathway damage
Akinetopsia
Optic Ataxia
Visual agnosia (2)
Akinetopsia : Visual motion blindness
Optic Ataxia: inability to reach for objects
Visual agnosia (2): difficulty recognizing objects
> apperceptive - failure of perception
> associative - failure of recognition
Template matching vs prototype theory
Template matching theory: every object has a template
CONS: simplistic, demanding, cant explain perspective
Prototype theory:
average representation - flexible context matters (typicality)
Expectation & bistable figures
Expectation mattter
Bistable figure: rabbit/duck; can change instantly
What are sound waves?
See Flashcard 33
Outer, Middle, Inner ear structures (2, 1:3, 3:4)
Outer: collects & focuses
- Pinna + ear canal
Middle: transfers & amplifies
- Ossicles : malleus + incus + staples
Inner: converts to neural signal
- Cochlea: basal (highf) + apex (lowf)
- Know basilar membrane & auditory nerve
How do hearing aids + cochlear implants work?
Hearing aids: Amplification
- Speaker toward eardrum & middle ear
Cochlear implants: Deliver sound directly to auditory nerve
Physical -> perceptual (amplitude, temporal info, wavelength)
Amplitude > loudness
Time & sound level 🔺 > location
Wavelength > frequency
Misophonia
Not a hearing disorder
decreased tolerance to specific sounds
source matters
psychological & physiological
Types of attention (3, what brain areas?)
Top-down: controlled & focuses
> frontoparietal, IPS, FEF, & BAS
Bottom-up: stimuli guided
>TPJ, VFC
Arousal: physiological (alertness)
> autonomic nervous system, reticular activatings
endogenous vs exogenous attention
endogenous: top down
exogenous: bottom up
spatial neglect
VPC damage
severe > hemi-neglect
Balint Syndrome
visual & spatial coordination deficits bilateral PL & OL damage
- Optic ataxia: problems grasping/visual control
- Oculomotor apraxia
- Simultagnosia
Simultagnosia
lack of ability to perceive more than a single object at a time
Optic ataxia
problems grasping/visual control
Oculomotor apraxia
a deficiency in voluntary, horizontal, lateral, fast eye movements (saccades) with retention of slow pursuit movements
Types of top down attention (3)
Sustained attention
Divided attention (shifts between tasks)
Selective attention
> ignore other inputs
> 4 theories*
*Early filter models
Broadbent, filter at perception level
Selected info processed
Evidence for : dichotic listening unattended better by ear
Evidence against: attended info can “break through”
*Treisman’s attenuation model
Early filters dial down unattended info instead of eliminating it
*Late selection filter model
We process to meaning, then select
Evidence for: Stroop task (colored color names)
> interference is evidence we process for meaning then ignore
*Load Theory
Selection occurs at different pts depending on load
High load > early
Low load > late
Sensory >(*ESFM high load)> perceptual>STM (semi filter attenuator) > (LSFM *low load) > Reponses
Load (2 ways to define)
Central resource capacity: one resource pool
Multiple resource capacity: multiple pools capacity reached sooner if info from same pool
Flanker task
High load performs badly no matter what flanks it
Low load: incompatible had higher RT
Flicker technique (change blindness)
change blindness: failure to notice change
Flicker technique: interstimulus mask leads to not noticing change
Inattentional blindness
Failure to notice new or unexpected events
Posner’s spotlight theory & cueing task
Spotlight Theory: we ignore outside of the attentional spotlight, disengage & shift
Cueing task: fixate on screen w/ cue area
target presented
long time interval: target in dif. arrea has faster RT
“been there done that”: recently attended areas inhibited
Visual search tasks (2 phases)
Pre-attention phases:
- object features separately coded
- Bottom up processing
Focused attention phase:
- object features integrated
- Top down processing
Features vs conjunction search
Feature: one feature, bottom-up
> pop-out effect: independent of # of distractors
Conjunction: Multiple features, top-down