Differentiating between autism spectrum disorders and other developmental disabilities in children who failed a screening instrument for ASD.

Ventola et al. (2007) watched toddlers who failed the M-CHAT. They used ADOS and CARS to see who had ASD and who had other delays.

They looked at joint attention, play, and sensory quirks. The goal was to find clear signs that separate ASD from global delay or language disorder.

Kids later diagnosed with ASD showed flatter joint-attention scores and steady social gaps. Kids with other delays had scattered lows but also some normal areas.

Strong, wide social and play deficits on ADOS/CARS pointed to ASD. Spotty skills pointed away from it.

Pandey et al. (2008) adds a time rule: screen at 24-30 months, not 18, or you will miss cases. Together the papers say 'fail early, check again later, then probe social details'.

van den Broek et al. (2006) warns M-CHAT can miss higher-functioning kids. Pamela’s team shows that deeper social testing helps catch those the screen alone might skip.

Weiss et al. (2021) used eye-tracking and also found the biggest social-attention gap between ASD and DD groups. Different tool, same red flag, boosting confidence in the social marker.

When a toddler fails the M-CHAT, do not stop at 'refer'. Run ADOS or CARS and zero-in on joint attention, shared play, and social reciprocity. If those areas are flat across tasks, lean toward ASD; if they vary, look at other delays. This two-step approach cuts wait time and sharpens early labels, letting you start targeted teaching faster.