The assessment of mood and affect in developmentally disabled children and adolescents: the Emotional Disorders Rating Scale.

Feinstein et al. (1988) built the first mood scale for kids with developmental delays. They called it the Emotional Disorders Rating Scale for Developmental Disabilities (EDRS-DD).

The team asked two raters to watch the same children and score mood signs. Good match between raters meant the scale was clear enough for everyday use.

Pilot tests showed the raters agreed most of the time. This early signal says the tool can give steady scores across staff.

No child counts or age ranges were shared, so we treat this as a proof-of-concept, not a final norm table.

Koegel et al. (1992) did the same kind of work four years later. They built the IBSE for autism traits in babies. Both papers prove small, clear item sets can survive real-world rating.

Villa et al. (2010) later gave the PEP-R a big-sample thumbs-up. Their large N backs up what C et al. hinted: short scales can be trusted if items are plain.

Faso et al. (2016) pushed the idea even further. They used fancy math (item response theory) to craft the 75-item DABS. C et al. kept it simple; J et al. showed how tech can sharpen the same mission.

You now have a free, ready-to-copy mood checklist for non-verbal clients. Add the EDRS-DD to your intake packet. Train two staff to score the same session; compare numbers before you write the report. If they match, you can trust the data and track mood gains across sessions.