Moms and dads of kids with Asperger’s (AS) can typically trace differences in their kid's development to as early as 30 months of age. Developmental screening during a routine check-up by a doctor may identify signs that warrant further investigation. The diagnosis of AS is complicated by the use of several different screening instruments, including:
- Asperger Syndrome Diagnostic Scale (ASDS)
- Autism Spectrum Quotient (AQ; with versions for kids, teens and grown-ups)
- Autism Spectrum Screening Questionnaire (ASSQ)
- Childhood Asperger Syndrome Test (CAST)
- Gilliam Asperger's Disorder Scale (GADS)
- Krug Asperger's Disorder Index (KADI)