For testing whether someone lacks the theory of mind, the "Sally-Anne" test is performed. The child sees the following story: Sally and Anne are playing. Sally puts her ball into a basket and leaves the room. While Sally is gone, Anne moves the ball from the basket to the box. Now Sally returns. The question is: where will Sally look for her ball? The test is passed, if the child correctly assumes that Sally will look in the basket. The test is failed if the child thinks that Sally will look in the box. Children below the age of four as well as older autistic children typically fail this test.