Japanese version of school form of the ADHD-RS: an evaluation of its reliability and validity.

Ohnishi et al. (2010) tested the Japanese teacher version of the ADHD Rating Scale. They wanted to know if it works as well as the English original.

Teachers filled out the scale for students in their classes. The team checked if scores hung together the same way they do in the United States.

The scale held up. It showed the same two-factor structure: inattention and hyperactivity-impulsivity.

Reliability and validity numbers were good. Japanese teachers can now use this form with confidence.

Tani et al. (2010) did the same job for the parent form in the same year. Both studies found the same two-factor shape, giving Japan a matched pair of home and school tools.

Davis et al. (2011) later showed the same two factors still hold when Japanese university students rate themselves. This extends the scale across age groups and informants.

Deng et al. (2011) ran a similar confirmatory factor analysis on a Chinese cognitive test. Together these papers show that Western scales can keep their structure when moved to East-Asian languages.

You now have a free, validated teacher scale for Japanese-speaking students. Use it to screen for ADHD traits before starting behavior plans or to track progress during intervention. Pair it with the parent form for a quick cross-setting check.