Subjects (N = 100) studied a series of 6 natural exemplars (birds) from each
of 12 different categories (families). Birds were presented in one of 4 ways:
(1) blocked by category; (2) intermixed; (3) first blocked, then intermixed; or
(4) first intermixed, then blocked. Following study, subjects judged the
likelihood that they would be able to classify new birds belonging to families
that had been studied earlier. Last, subjects were asked to classify 6 new
birds from each of 12 studied families. The data were collected in the
laboratory and are stored using figshare in an Excel file alongside an annotation
file. The data can inform future investigations of the way that individuals
learn natural concepts and categories.