least inclusive ref name referencea three levels abstraction follows '''superordinate level''' eg flower highest inclusive level abstraction exhibits highest degree generality lowest degree within category similarity ref name markman b markman b wisniewski e j similar different differentiation basic level categories journal experimental psychology learning memory cognition ref '''basic level''' eg rose middle level abstraction rosch colleagues suggest basic level cognitively efficient ref name referencea basic level categories exhibit high within category ' 'similarities''
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