Theory of mind was assessed in 32 adults with HFA, 29 adults with Asperger syndrome and 32 neurotypical adults. The HFA and Asperger syndrome groups were impaired in performance of the Strange stories test and the Faux-pas test and reported more theory of mind problems than the neurotypical adults. The three groups did not differ in performance of the Eyes test. Furthermore, correlations between the Eyes test and the three other theory of mind tests were low or absent. Therefore one can question the ability of the Eyes test to measure theory of mind. Of all theory of mind tests used, the self-report questionnaire had the largest discriminating power in differentiating the two disorder groups from the neurotypical group.