This study illustrates the use of the Griffiths III Scales to further clarify a diagnosis of Autistic Spectrum Disorder and possible Attention Deficit/Hyperactivity Disorder following a test battery of the Childhood Autism Rating Scale, Conners 3-Parent and Teacher Surveys, and the Goodenough-Harris Draw-a-Person test in a child aged 6 years. The Griffiths III assessment confirmed a pattern of delay above and below DQ50. The child demonstrated difficulty with the constructs: Skills for Learning (including attention, curiosity, processing speed); Ways of Thinking, Memory and Play; all aspects of language and communication; and all underlying constructs of early social and emotional development. The concept of Theory of Mind is used to examine the child's particular difficulties.