07_ Knowledge_Represent_Org

Likely to be relevant properties unclear denition of

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ts organized around a measure of central tendency of the category  ­ prototype   May be actual instance   Generally ‘best’ category member   Prototypes describe natural clusters of correlated attributes   Category judgment  ­ how similar to prototype 14 15   Like Classical View  ­ similarity explains categorization   Different from Classical View  ­ instance can be in category even if mismatches on number of properties   Even ‘definitional’ categories show typicality effects (e.g. odd number, female)   Diagnosticity of particular attributes Diagnosticity Attribute Value Weight 1 red 25 green 5 Color brown .5 15 1 cylindrical Texture round square .25 Shape 5 smooth 25 rough 5 bumpy 5 16   Typicality effects change with context   Rating typicality of farm animals ▪  ‘Bertha enjoyed riding the animal’ ▪  ‘Bertha enjoyed milking the animal’   Typicality of spoons  ­ size and material (Medin & Shoben)   Instability of ratings at odds with belief that prototype represents stable cluster of correlated properties   Weightings of values/diagnosticities are changeable   Contributions of different properties are mutually dependent   Complex concepts   Red   Car   ‘red car’   Combine prototypes?   Pet   Fish   ‘P...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online