Skip to main content

Krug Asperger’s Disorder Index (KADI)

The Krug Asperger’s Disorder Index (KADI; Krug & Arick, 2003) is a screening instrument for Asperger Syndrome.


It is also a useful tool for developing goals for intervention. Two forms, elementary (6–12 years) and secondary (12–21 years), cover a wide age range. The KADI is divided into two sections. Section one is a pre-screening tool. Section two consists of additional items, which are completed only if results of the screening tool indicate a need for further assessment.


Author (yr) Age Range (yrs) Method of Administration/Format Approx. Time to Administer Subscales
​Krug Asperger’s Disorder Index (KADI) – Elementary form/ Secondary form Krug & Arick (2003) 6-22

32-item parent/caregiver or teacher questionnaire

Respondents first complete the prescreening scale. Additional items are completed based on the results of this scale.

Yields standard scores and percentiles.

15-20 min.


Screening/Diagnosis: S


Download PDF