Diagnostic Evaluation of Articulation and Phonology
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Diagnostic Evaluation of Articulation and Phonology


Overview: Evaluates both articulation and phonological process using a Diagnostic Screen, a diagnostic Articulation Assessment, a diagnostic Phonology Assessment (with a phonological analysis), and an Oral Motor Screen.

Age Range: 3.0 to 8.11 years

Completion Time: Diagnostic Screen 5 minutes; Articulation assessment 10-15 minutes; Phonology assessment 10-15 minutes; Oral Motor Screen 5 minutes

Norms: n= 650 with a sample based on the current U.S. population

Scores/Interpretation: Standard scores and percentile ranks for Sounds in Words, Phonological Process Use, and Single Words vs. Connected Speech Agreement Criterion

Publication Date: 2006


Product Details

The Diagnostic Evaluation of Articulation and Phonology (DEAP) is a comprehensive standardized assessment that evaluates both articulation and phonological processes. The DEAP includes a Diagnostic Screen, a diagnostic Articulation Assessment, a diagnostic Phonology Assessment (with a phonological analysis), and an Oral Motor Screen. Use it in conjunction with CELF-4, PLS-4, or another comprehensive language test to obtain a complete understanding of a child's speech and language ability.  

Diagnostic Screen – In Just 5 Minutes!

  • Appropriate for general screening of speech disorders and for initial referrals
  • Use screening results to customize the DEAP assessment process
  • Obtain a Differential Diagnosis of articulation disorders and disorders of phonological processes2 Tests in one!
  • Discriminates children with typically developing speech from children who have delay/disorder and directs the clinician to use the relevant assessment(s) for assessing the child's speech system
  • Examine oral motor function by administering the Oral Motor Screen.

DEAP Provides You with More Assessment Options

  • DEAP provides stimulability opportunities in isolation and CV or VC syllables for sounds in error
  • The Phonology Assessment provides information about error patterns and differences between single word and continuous speech production
  • Develop appropriate therapy plans based on the child's performance on DEAP
  • Gain a more comprehensive understanding of the child's needs through the provided validity studies, which address developmental patterns for children with articulation, phonological, or oral motor disorders

DEAP Uniqueness

  • Quick Articulation and Phonology Screening
  • Colorful and Engaging Pictures
  • Speech sounds are sampled at least twice to ensure that you have a thorough picture of the child's sound system
  • Articulation Assessment samples all English sounds including vowels
  • Oral Motor Screen provides a brief assessment of sequencing and accurate and fluent production of speech

Attractive, colorful pictures to elicit target sounds and phonological processes



Technical Report

DEAP Technical Report (PDF - 216 KB)

Pricing & Ordering

Order Complete Kit

Order Components

Manual Scoring
  • Kits



  • DEAP Complete Kit
    Includes Examiner’s Manual, Stimulus Manual, 25 Diagnostic Screening and Summary Record Forms, 25 Articulation and Oral Motor Record Forms, and 25 Phonology Assessment Record Forms
  • Manuals



  • DEAP Stimulus Manual
  • DEAP Examiner's Manual
  • Administration Materials



  • DEAP Diagnostic Screening and Summary Record Forms
    Pkg of 25
  • DEAP Articulation and Oral Motor Record Forms
    Pkg of 25
  • DEAP Phonology Assessment Record Forms
    Pkg of 25
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