A German Validation Study of the Ritvo Autism Asperger Diagnostic Scale-Revised (RAADS-R)

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

DRKS

Registry ID

DRKS00010622

Enrollment

240

Registered

2016-06-27

Start date

2016-01-18

Completion date

Unknown

Last updated

2026-03-30

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

other Axis-I Disorders (without Autism Sprectrum Disorder) F84.0 F84.1 F84.5

Interventions

Group 1: Group ASS. Diagnosis of ICD-10 Autistic Disorder (F84.0, F84.1/11. F84.5). Measurement of comorbidity (SKID-I, Freiburg only), measurement and verification of autism spectrum symptomatolog

Eligibility

Sex/Gender

All

Age

18 Years to 65 Years

Inclusion criteria

Inclusion criteria: [all groups]: IQ = 80; age between 18 and 65 years; comorbidity admitted; german as first language; [ASD-group]: ICD-10/DSM-5 diagnosis of autism-spectrum-disorder (ICD-10: F84.0, F84.1/11, F84.5); [axis-I disorder group]: ICD-10/DSM-5 diagnosis of axis-I disorders; without ASD; [control group]: without ICD-10/DSM-5 diagnosis of axis-I disorder and ASD

Exclusion criteria

Exclusion criteria: IQ >80; german is not the first language; acute depressive episode (SKID I); acute psychotic symptoms (SKID I); acute suicidal tendencies

Design outcomes

Primary

Measure	Time frame
The screening-instrument RAADS-R (self-report) preferably seperates between individuals with high-functioning ASD and individuals without ASD, that is the RAADS-R has better sensitivity and secificity than previous screening-instruments, e.g. AQ (Autism Questionnaire) and EQ (Cambridge Behaviour Scale). Primary targets: total sum and dimension sum for calculating the cut-offs between individuals with ASD and individuals with axis-I disorder but without ASD.	—

Measure

Time frame

The screening-instrument RAADS-R (self-report) preferably seperates between individuals with high-functioning ASD and individuals without ASD, that is the RAADS-R has better sensitivity and secificity than previous screening-instruments, e.g. AQ (Autism Questionnaire) and EQ (Cambridge Behaviour Scale). Primary targets: total sum and dimension sum for calculating the cut-offs between individuals with ASD and individuals with axis-I disorder but without ASD.

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Secondary

Measure	Time frame
The screening-instrument RAADS-R preferably seperates between individuals with high-functioning ASD and individuals with primary axis-I disorders than previous screening-instruments like AG (Autism Questionnaire) and EQ (Cambridge Behaviour Scale). Secondary targets: total sum and dimension sum for calculating the cut-offs between individuals with ASD and individuals with axis-I disorder but without ASD.	—

Measure

Time frame

The screening-instrument RAADS-R preferably seperates between individuals with high-functioning ASD and individuals with primary axis-I disorders than previous screening-instruments like AG (Autism Questionnaire) and EQ (Cambridge Behaviour Scale). Secondary targets: total sum and dimension sum for calculating the cut-offs between individuals with ASD and individuals with axis-I disorder but without ASD.

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Countries

Germany

Contacts

Public ContactThomas Fangmeier

Universitätsklinikum Freiburg, Zentrum für Psychische Erkrankungen, Klinik für Psychiatrie und Psychotherapie

thomas.fangmeier@uniklinik-freiburg.de+49 - (0)761 - 270 - 69680

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Apr 4, 2026