There is a simple screening tool for pediatricians/family practitioners for finding early signs of Autism Spectrum Disorder.
The Modified Checklist for Autism in Toddlers (M-CHAT™, Robins, Fein & Barton, 1999) is available for free downloads for clinical, research and educational purposes.
The M-CHAT™ and scoring instructions are available for download here:
M-CHAT and M-CHAT Scoring Instructions. Additional information on the use of M-CHAT™ is available at M-CHAT Information. Please note there are important qualifications and copyright information related to use of this tool.