How are things organized? (hint: there are three terms)
Categories > exemplars > concepts
What are categories?
Items grouped together
What are exemplars?
Individual items within a category
What are concepts?
General knowledge of a category
What are the different levels of organization?
Superordinate (high level) -> basic (mid level) -> subordinate (low level)
e.g., mammal -> dog -> terrier
What order will children learn in?
Basic -> superordinate -> subordinate
What is the relationship between children learning and people with dementia forgetting
Reverse:
What gets forgotten first: subordinate -> superordinate -> basic
What is cognitive economy?
Being able to identify an object with the most basic level
What is generalization?
Process of getting a concept from a # of specific cases and applying that to help us
What are defining features necessary (and sufficient) for?
Category membership
Has the features => is that concept
What are characteristics features?
Common, but not essential for category membership
What is the issue with identifying concepts through features?
Too rigid - if we encounter an unfamiliar feature we still know what concept it is
What is the other idea about concepts and features?
Concepts are defined by resemblance to a collection of features
How are feature lists and networks connected?
Early learning (features) -> later learning (network with interconnectivity)
How are concepts organized/connected?
Through similarity
What is a prototype?
Generalized from specific examplars
How is a prototype used as reference?
Classified as being near or far
What was the prototype experiment and its results?
Participants classified pattern of dots
Shown prototype => better at classifying
Closer to prototype => quicker to recognize
What is the exemplar theory?
There is no single abstract prototype for a concept - we are constantly comparing things
How do the prototype and exemplar theory compare?
of things in memory
Prototype: only one prototype model
Exemplar: every instance - more demand
What is knowledge-based theory?
Implicit intuitive knowledge used - things have a reality that we have an understanding of (doesn’t use prototype or exemplar)
Why are concepts created?
To meet goals
How is knowledge stored?
As sensorimotor neural representation
What is the perceptual symbols system?
Perception and concepts are linked as ‘perceptual symbols’
- Activating a concept will engage certain sensory-perceptions to form mental stimulation for a given goal or task