The optimal goal of the current study was to incorporate measures of particularcomponents in Myles et al.’s (2007) national study of the characteristic profile ofAsperger Syndrome (AS) in order to identify an item pool for developing a newinstrument that evaluates such characteristics. Six instruments completed by parentsof individuals with AS and adolescents with AS themselves, were used in thisproposal. The study involved (a) evaluating the factorial structures of each instrumentto identify items that cluster meaningfully into independent groups, (b) assemblingthose six instruments and exploring the underlying constructs among them, and (c)identifying meaningful items that could be included in the development of a newinstrument. Principle components factor analyses were used to analyze data. Resultsindicated that (a) five out of six instruments changed in their factorial structures, (b)nine factors were found to underlie the combined measure of the six instruments, and(c) a total of 75 items were retained after these analyses. Overall, an item poolcontaining 75 behavioral statements was suggested for inclusion in the developmentof the instrument for identifying characteristics of individuals with AS.