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ADI™-R

Autism Diagnostic Interview-Revised

Michael Rutter, M.D., FRS, Anne Le Couteur, M.B.B.S., Catherine Lord, Ph.D.

Assess individuals suspected of having an Autism Spectrum Disorder in ages 2 and older


ADI™-R

Overview

Overview

The ADI-R helps to assess individuals suspected of having Autism or an Autism Spectrum Disorder.

  • Can support diagnostic decisions
  • Assists in differentiating autism from other disorders
  • Provides an empirically validated basis for education and treatment planning
  • Particularly effective in assessing syndrome boundaries, identifying new subgroups, quantifying Autistic symptomatology, and determining the clinical needs of groups in which a high rate of Autism Spectrum Disorders might be expected, such as people with severe language impairments

Key Areas Measured


Key Areas Measured

  • Language and Communications
  • Reciprocal Social Interactions
  • Restrictive, Repetitive, and Stereotyped Behaviors and Interests

Quick Reference

Age

Age

2 and Older

Administration Type

Administration Type

Interview

Administration Time

Administration Time

90 to 180 Minutes

Qualification Level

Qualification Level

B

Format(s)

Format(s)

Handscored

Software (Scoring)

Complementary Tools

Complementary Tools

Conners CBRS®

Quick Reference

Age

Age

2 and Older

Administration Type

Administration Type

Interview

Administration Time

Administration Time

90 to 180 Minutes

Qualification Level

Qualification Level

B

Format(s)

Format(s)

Handscored

Software (Scoring)

Complementary Tools

Complementary Tools

Conners CBRS®

How To Use

How To Use

Reliability and Validity

Reliability and Validity

To administer the ADI–R, an experienced clinical interviewer questions a parent or caretaker who is familiar with the developmental history and current behavior of the individual being evaluated, and uses standardized procedures to code the responses. The interview can be used to assess children and adults as long as their mental ages are two years or higher. Because the ADI–R is an interview rather than a test, and because it focuses on behaviors that are rare in non-affected individuals, it provides categorical results rather than scales or norms.

Inter-rater and test-retest reliability, as well as internal validity, have been demonstrated for the ADI-R.

Reliability

Test-retest reliability and interrater reliability were assessed in unselected clinical (n = 50) and nonclinical (n = 30) populations. Concurrent validity (n = 120), discriminant validity (n = 120), and criterion validity (n = 29) were evaluated in Autistic Spectrum and non-Autistic patients. Results: Test-retest and interrater reliabilities were excellent (most intraclass correlation coefficients > 0.9).

Validity

The factor structure, internal consistency, and convergent validity of the Autism ADI-R algorithm items were examined in a sample of 226 children with Pervasive Developmental Disorders. Exploratory factor analyses indicated a three-factor solution closely resembling the original algorithm and explaining 38% of the variance, with one significant discrepancy. Unlike the algorithm, all nonverbal communication items were associated with the Social factor. Internal consistencies of domain scores ranged from .54 to .84. Correlations between ADI-R domain and total scores and instruments assessing adaptive behavior, psychopathology, and Autism were examined. They indicated some similarities between constructs, but also that the ADI-R measures Autism in a unique fashion.

Concurrent validity (agreement with independent clinician formulation) was very good (mean [kappa] = 0.74). Criterion validity, a comparison with the Autism Diagnostic Interview, was excellent. Discrimination between Autistic Spectrum versus non-Autistic subjects was almost perfect (sensitivity 1.0; specificity > 0.97).

Pricing
Online

Online

Assess easily online from anywhere. Includes automatic scoring and report generation.

Software

Software

Requires software. Includes automatic scoring and report generation.

Handscored

Handscored

QuikScore forms are scored by hand without reports.

Starter Kits
Certification

Starter Kits

Simulations
Certification

Simulations

Kits

ADI-R Kit

Manual, 10 Interview Booklets, 10 Comprehensive Algorithms Forms

Handscored
CA: $365.00

ADI-R Training Packages

Includes training program on 8 DVDs, a guidebook with behavior coding instructions and examples, 9 Interview Booklets, 3 Comprehensive Algorithm Forms

Handscored
CA: $1,242.00

Forms

Autism Diagnostic Interview Revised Interview Booklets

Autism Diagnostic Interview Revised Interview Booklets

Handscored
CA: $132.00
(Sold in packs of 5)

ADI-R Comprehensive Algorithms Forms

ADI-R Comprehensive Algorithms Forms

Handscored
CA: $25.00
(Sold in packs of 10)

Ortiz PVAT Licenses

Ortiz PVAT Licenses

Online Scoring

Online Scoring

Supplementary Materials

Supplementary Materials

Other Materials

Other Materials

ADI-R Manual

Autism Diagnostic Interview Revised Manual

Default Title
CA:
$115.00

ADI-R UNLIMITED-USE SCORING CD

ADI-R UNLIMITED-USE SCORING CD

Default Title
CA:
$332.50