EDDT- Emotional Disturbance Decision Tree

By  Bryan L. Euler, PhD

Qualification Level: 

Purpose: Assist in the identification of children who qualify for the special education category of emotional disturbance
Age: 5 to 18 years
Admin: Individual or group; Informant report
Time: 15-20 minutes

The first instrument of its kind to provide a standardised approach to the assessment of emotional disturbance (ED), the EDDT encompasses the broad emotional and behavioural nuances of children who may require special education services for Emotional Disturbance.

The EDDT includes five sections, enabling you to work through each criterion one by one. Because the criteria specify that socially maladjusted children can’t qualify for services unless they are both socially maladjusted and emotionally disturbed, the EDDT treats social maladjustment as a supplemental trait and assesses it separately from ED.

Includes both exclusionary and inclusionary items

  • Emotional Disturbance Characteristics scales include Inability to Build or Maintain Relationships, Inappropriate Behaviours or Feelings, Pervasive Mood/Depression, and Physical Symptoms or Fears.   
  • Screening items are included within the Attention-Deficit Hyperactivity Disorder cluster and the Possible Psychosis/Schizophrenia cluster.
  • The Level of Severity cluster and the Educational Impact cluster address how emotional and behavioural problems affect students and aid in the development of recommendations and interventions.

Valid and reliable for a variety of users

  • Norms are based on a sample of 601 children who were demographically matched to the U.S. population. Data were also collected on a sample of 404 children eligible for special education due to an ED diagnosis.   
  • Internal consistency was high (r = .94) for the EDDT Total Score and ranged from .75 to .88 for the scales. In addition, test-retest stability was high (r = .92) and interrater reliability was good (r = .84) for the EDDT Total Score.
  • Convergent validity was examined using the CAB™ Teacher and Parent Forms, the BASC-2 Teacher Form, and the Teacher Report Form of the CBCL. Validity also was examined in populations of children with specific learning difficulties, speech/language impairment, mental retardation, ADHD, autism spectrum disorder, and social maladjustment.

EDDT Introductory Kit

EDDT Introductory Kit

EDDT Introductory Kit includes: EDDT Professional Manual, 25 Reusable Item Booklets, 25 Response Booklets, and 25 Score Summary Booklets ...


EDDT Professional Manual

EDDT Professional Manual

EDDT Professional Manual Qualification Level:  A 
EDDT Response Booklets

EDDT Response Booklets

EDDT Response Booklets (pkg/25) Qualification Level:  A 
EDDT Reusable Item Booklets (pkg/25)

EDDT Reusable Item Booklets (pkg/25)

EDDT Reusable Item Booklets (pkg/25) Qualification Level:  A 
EDDT Score Summary Booklets

EDDT Score Summary Booklets

EDDT Score Summary Booklets (pkg/25) Qualification Level:  A