This study examined whether books that are typically read to preschool
children contain theory of mind concepts. The parents of 47 preschool
children recorded books read by or to their child over a one-week per
iod. The books were analyzed for theory of mind content. It was found
that 78% of the books contained internal state language, 34% contained
false beliefs, and 43% contained personality descriptors. Thus, theor
y of mind concepts appear to be an integral part of the literature rea
d to preschool children. These results are discussed in light of recen
t work on individual differences in theory of mind development.