“…Clearly, children have difficulty in identifying the superordinate concepts (see Markman, 1989;Rosch et al, 1976), which have been the taxonomic categories used in most studies, and this is one reason why they have resorted to thematic sorting even when the stimuli were not particularly amenable to it. Greenfield and Scott (1986), for example, found that 3-year-olds could explain 92% of their thematically paired items but only 25% of their taxonomically paired items. Furthermore, children are probably less concerned with consistency in their grouping.…”