Object Recognition week 4 Flashcards
Is object recognition top down or bottom up?
- BOTH - we import information from the environment and also we rely on our experiences memories etc.
What are 3 key things to remeber when talking about how we recognise objects?
- Object constancy - a dog is a fig noo matter where we see it from or where it
- Viewing position
- Context
What is the 8 Gestalt principles of how we group similar elements and recognise patterns ?
- Proximity
- SImilaritiy
- Figure/ground
- Encolsure
- symmetry
- connection
- continuity
- closure
What is Agnosia ?
- Means without knowledge and was first coined by Sigmund Freud, problems accessing knowledge
Some facts about visual agnosia
- there is a incongruence between knowing a object and being bale to use it, people can use a pen but cant recall what it is
Difference between apperceptive agnosia and Assocative ?
apperceptive - difficulty forming a new percept, patiernts cannot combine visual information and objects cannot be recognised. they could draw an apple from memory but could not copy it from a picture. Links to the THIS and the 7415 example , linked to lesions in right hemisphere
Associative - Problems accessing the inofrmation, problems accessing knowledge. they can group similar objects and also can copy but cannot do it from memory or tell you what somehting is. linked to left hemipshere
What is a integrative agnosia ?
- a composition of both appereceptive and also associative agnosia
What is Prospagnosia ?
- Inability to recognize faces ,
FFA associated with processsing invariant aspects, damage to FFA found in the temporal lobe, also links to damage with the STS superior temporal sulcus.
Patients have a strategy to recongise loved ones
faces are more hollistic analysis and words is the analysis of parts
How does autism linke to FFA
- ASD linked to hypoactivation of the FFA, find it harder to recognise faces as they analyse parts of the face rather than a holistic view, tend to not focus on the eyes
What is PPA
Parahippocampal place area - the area pf the brain that is linked to when we look at landscapes specifically well known ones
What is EBA
Extrastriate Body Area - where we process and perceive the body
