What do executive factors contribute to the failure on false belief tasks by children with autism?

As children with autism have pervasive executive difficulties it is necessa ry to determine whether these contribute to their often-reported failure on the false belief task. Failure on this task is frequently taken to diagnos e the lack of a "theory of mind". We report two studies using two tasks tha t make similar executive demands to the false belief task. The first experi ment showed that children with autism are significantly challenged by a "co nflicting desire" task, which suggests that their difficulty with the false belief task is not rooted in difficulty with grasping the representational nature of belief. In the second study children with autism were also found to be impaired on a novel version of the "false photograph task". A parsim onious reading of these data is that their difficulty with all three tasks is due to commonalities in the tasks' executive structure.