Effect of language and task demands on the diagnostic effectiveness of the autism diagnostic observation schedule: the impact of module choice.

The team gave different ADOS modules to the same kids. They wanted to see if harder language tasks changed scores.

Each child tried both a low-demand and a high-demand module on separate days. The testers did not know which module came first.

Kids scored higher on the module with tougher language tasks. Some moved above the autism cut-off only because of the harder module.

In plain words, the test made the children look more impaired when the tasks got harder.

Hong et al. (2021) later showed the Toddler Module keeps its accuracy when you use the right cut-offs. Their good news only holds if you pick the toddler version, not a harder one.

Hus et al. (2014) fixed part of the problem. They gave Module 4 new severity scores so adult scores line up across modules. The 2007 paper showed why this fix was needed.

Bennett et al. (2008) found the revised algorithm can over-identify autism in Hispanic kids with mild social delays. Together these studies say: both module choice and culture can tilt the score.

Before you open the ADOS kit, match the module to the child’s real language level. If you guess high, the score may push the child into an autism range they don’t belong. Always write the module number in your report so future teams know which rules to use.