1. Colaruso R, Hammil D (2003) Motor free visual perception test. Academic Therapy Publications, New York
2. Gardener MF (1996) Test of visual-perceptual skills. Psychological and Educational Publications
3. Roid G (2003) Stanford-binet intelligence scale. Riverside
4. Gluting J, Adams W, Shwslow D (1999) Wide range intelligence test. Wide Range
5. Sala D, Gray C, Baddeley A, Wilson L (1997) Visual patterns test. Thames Valley Test Company