Although the typicality effect has been much studied in the semantic memory literature, typ-icality ratings exist for exemplars from only a very limited number of categories. This lack of ratings frequently limits the range of stimuli that can be used in investigations of the typicality effect. As an aid in stimulus construction, this paper reports typicality ratings of 893 exemplars from 93 different categories.
The subject is presented a sentence of the form 'An S is a P'; ... The subject is asked to determine as quickly as possible whether the sentence is true or false... - that is, whether the concept named by the subject term of the sentence is a member of the category named by the predicative term.