US lawWashingtonRegulationsTitle 388 — SOCIAL AND HEALTH SERVICES, DEPARTMENT OFChapter 388-828 — THE DEVELOPMENTAL DISABILITIES ADMINISTRATION (DDA) ASSESSMENT388-828-5500WAC 388-828-5500WAC 388-828-5500. What is the DDD behavioral acuity scale?Last amended: 2007Year: 2026Length: 23 wordsOfficial source The DDD behavioral acuity scale is an assessment of your behavioral support needs based on your scores from the SIS exceptional behavior scale.PreviousWAC 388-828-5480NextWAC 388-828-5520