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UIUC / Psychology / PSYC 224 / What causes hemineglect?

What causes hemineglect?

What causes hemineglect?

Description

School: University of Illinois at Urbana - Champaign
Department: Psychology
Course: Cognitive Psychology
Professor: Kara federmeier
Term: Fall 2015
Tags: UIUC, psych 224, and Cognitive Psychology
Cost: 25
Name: Weeks 1-2 Notes
Description: Hey guys! Please let me know if I can clarify any information or type something out. I'm still getting back into the hang of writing legibly!
Uploaded: 09/04/2015
3 Pages 184 Views 3 Unlocks
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weeks Day 2


What causes hemineglect?



* Skipping chapter 2, but

info in there could be. helpful if necessary (brain

related)

8/27115

-Recap

- cognitive psych seeks to make objective -

measurements - Observation |

- measuring 2 or more things to look for

-Advantages us disadvantages - Experimental design


How does the brain deal with ambiguity?



If you want to learn more check out What are the arguments of the interparadigm debate?

-independent variable

-manipulating factor d e bain T -dependent variable

- Data result of manipulated variable - confounding variables 3o- outside influences Don't forget about the age old question of What is the location of the atlantic ocean?

- amount of sleep, GPA, major, test

performance - Advantages gong- Get to control situation a tona We also discuss several other topics like How low can the stock price fall before you get a margin call?
If you want to learn more check out What's an early example of modern production under constant research and renovation?

-Disadvantages


What happens when we blink?



Dem and charactenistics o

Knowing they're in an experiment

may effect their performance -May confirm or deny experiment

based on participant -Effects of single variable

- known as "main effects". -can also look @ interactions

- effect of one variable consistent across

manipulation of the other variable - No interaction in ORGA - No difference in the prior knowledge

oswe st or beliefs that would change the outcome

Study Soup

Study SOU

- partial us. Full report If you want to learn more check out How does the embryo of a sea urchin develop?

-partial report is more effective -Properties of Iconic memory or

-visual sensory memory

large capacity or oro los - Rapid Decay - The NEXT stage of processing Don't forget about the age old question of What is the difference between hate speech and fight words?

Seems to be much more limited - What's the problem?

no presented wl more than we can

- Process -Focused Attention

en select to attend some into Dignore other

into - WHEN I WHAT KIND of information is

being blocked?

- @what stage is info lost?

- Early selection vs. late selection - Study ingstudyingtion attention

- Dichiotic listening task C Cherry, 1953)

- 2 difu nds are being playd into

each ear or tool Air Studying the ability to bous on

a one speaker when bombarded wl

two different speakers - Findings

- people really only paid attention to ou no one ear (couldn't even distinguish ennoden the other ear's language) big of

participants de notice whether .. nanen w the speakers were male or female

but retained no actual info

nformation

studur

taso

- Updating the model in

- ERP does show some filtering but

they are only stiffed, not blocked completely -Summary

- selection occurs early

- Not a completely limiting filter oth-some sort of selection b flexibility

depending on the situation - What kind of info is collected? -

- Evidence from patients a -Hemi neglect

- patients "ignone" one side of space

Stupically the left) -only see half of everything to

-Drawing half a picture, Shaving half

their face, even rejecting ownership

of parts of their own bodies -Suggests attention may be spatial - Spotight? In

- beam of chanced perceptual processing

that can be moved based on stimuli

Study Sous

How does the brain deal w! ambiguity?

- context, making assumptions and top down ito.

- Context ( contrasts)

-The eye can register background otom and daan attempt to adjust for it.

- Sharp differences in context

-get accentuated and cala bevery

helpfert (finding sharp edges - constant factors in context hana -Get ignored to draw out new or

unfamiliar info (noticing variability) -Making Assumptions -Shading ambiguity

- we can assume where light is coming from based on shading b

Shadows - Often assume light source is coming

from above - our brains recognize things in.

Shadow and make them appear

lighter to compensate for the shadowing -Grouping

-Gestatt principlals (proximity, similarity, continuation,

proximity.

ยป Closure) wenga ha o -brains will group things together tchat

are closer in proximity or color (similarity) Good continuation

Good

e al bebom -4 lines? 2 ? oney?

a ge na - Brains will make it one object hat could noter rather than 4 ble it continues

Study S

-Leads to more ambiguity!!

ex)" olive, the other reindeer"

PUS

"All of the other reindeer for -Variability in sound production

-phone me (particolar sounds) depend on ooo

- speaker (dialect, pitch, accent) - rate of speech

- emotional factors (screaming, crying ) - Citegorical Perception..

Leggagerates, - Auditory system leggo a tres differences

between sounds to further distinguish

ex) sounds "in between" "PA and BA are

either heard as one of the two o to avoid confusion

babies show this at an early age. -context effect

- auditory systems combines what context

has been provided by the visual system

- Baba o sounds like "Lala" if we see

the person making the facial motions for not "Lala"

-McGurk Effect - Audition : Summary!

-oocooblecenbeple is also made up of partial ambiguity

- uses context to clear up confusion (taking cues from - Taste and smell

- context quides taste perception

ex) people Levens experts) would define

a white wine tred food coloring as being

red wine - Perception Summary:

Study Soup

other senses)

tudySour

week2

The

SON

Study Sou

9/3/15

Attention - Attention

- what happens when we blink?

eyes retain surroundings during a blinks so you're not shocked every time

you open your eyes too

Means that some son of scenery information is being stored by

the brain - sensory store

- subjective impressions on Change Blindness

- what / of people would

notice if they looked away and looked back and the person's appearance would change?

-50%! - It's easy to miss what you're

not looking for 3 - Also can be shown using the

fucker effect? - what does change blindness reveal?

Don't store as detailed of o z on at a report as people think a a habradarad a - can be tested by free recal

ty trials on

podremom has a time limit natoote hinal conic memory sa

zato now -partial report technique

instead of remembering hautente esta 9 numbers, bengable to pick con

d om now at kast a few numbers out on lataan reporting like 75% of info

SO

SLOV SOU

- Closure

- we tend to assume that shapes

close diagramsin posted Slides) -Recap: Assumptions

- The visual system makes assumptions

about typical viewing Conditions and about what parts of a visual scene so together

- can't be turned off it can be misleading

Top Down"

-Recognizing objects is quicker in a congruent scene

than an incongrent scene.

- more likely to recognize woman sitting in

e classroom than on a city street - What does this say about our model of visual o perception

Imemory

biect by outside world context recognition (where might a womansit?

I visual

Processing

Linput -vision: Summary

- process that creates a 3d representation

from our 2D perception through memory and

context o assumptions Clooking @ backgrounds to - Audition! (Hearing).

filling in blanks) - Speech Spectogram

- The stream is continuous (model in slides)

-The amount of darknessin spectogram

is where theres information (sound) but doesn't indicate where words end (word boundariess

VidVSOLD

Study Soul

Study Soup

Study Sow

al3/15 week 2

Roger Bag Sathe BGSL parede - Thought auestion:

imagine you are building an artificial vision system :

- uses grouping principles to determine #

of objects

to are extracted Features of objects and the theseene

S

-objects are identified serially, by

comparing features - How will the system behave wl an

object presented in isolation rather than

a complex scene 0 - Quicter recognition of - Is this similar to the pattern that

humans use? ton-kind of the opposite he - Breaking down the model

Grouping Slobject I Tobi 3 lobj 3

Study

input

obiect recognition - what does recognition look like

in different types of contexts otrog- Would it turned out the same way lot na if thanse tants werent there?

arrows

Study Soup

tady sour

Studs

- Attention as a filter

- May be attention acts like a filcen im letting only desired into in watt

-If so, when does the dichotic listening

data suggest that this takes place?

- people could really only tell -

physical properties, but no real info was stored ( Pitch l Gender) - Suggests that filter is in the tode

middle of perceptual processing (early selection) -Problems,

-some higher level info seems to

pass through the filter an

- people notice their names Go n n-Individual differences in sensitivity verlorenus en - Cocktail party effect

- More likely to notice your own te od name if you have a low

working memory ani If the ears switched, you'd follow the original nam information instead of sticking to listening to

the one ear.

- Suggests late selection

filter - Are some people just better @ focusing? -Lateselection

- Selection after recognition

- Never ending debate - Support for early selection

- ERP studies in attention

- Simplified beeps to monitoring of brain

waves proves early secection

So

tudy sou

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