Categorical feature & exemplary feature

The left hemisphere identifies things as members of a category while the right hemisphere does so by situating them as similar to some ideal exemplar. 

The category is defined in terms of the components that define the type whereas the exemplar is defined in terms of the whole of the representative individual. 

The categorical feature that defines the type tends to the theoretical and the invariant; the exemplary feature that defines the ideal individual tends to the experimental and the variable real world experience.