Modified checklist for autism in toddlers: cross-cultural adaptation and validation in Spain.

Canal-Bedia et al. (2011) translated the M-CHAT into Spanish. They wanted to see if it still flags toddlers who need an autism check-up.

The team followed the same steps used for the English form. They checked wording, ran it with families, and compared results to later diagnoses.

The Spanish form caught autism signs about as well as the original. It just called “positive” on more kids who turned out not to have ASD.

Low ASD rates in the sample made every positive screen less likely to be true. The tool works; the numbers just shift in low-prevalence groups.

Hong et al. (2021) did the same kind of job with Arabic caregiver scales. Both studies used forward-back translation and Cronbach’s alpha. The Spanish and Arabic tools now hold up in everyday clinics.

Parvizi et al. (2026) and Rivard et al. (2017) also adapted parent forms for Persian and French families. Each paper shows one clear message: translate carefully, then the measure keeps its strength.

None of these studies clash. They simply repeat the recipe in new languages. Together they give BCBAs validated forms for Spanish, Arabic, Persian, and French families.

If you screen toddlers in Spanish, use the new M-CHAT with confidence. Expect more false alarms in low-risk groups and plan follow-up time accordingly. The same caution applies to any tool when base rates are low.