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GDAP Glaspey Dynamic Assessment of Phonology- 25 Forms

In stock
Speech Therapy
Ages: 3-10
Testing Time: 2-3 minutes/phoneme
Qualifications: Level B

The GDAP is the first standardized dynamic assessment of speech production and stimulability. This ground-breaking approach employs a unique 15-point cueing system and hierarchy (from 15 to 1) which represents the scaffolding levels available to a child in the production of a target. This responsive approach provides for a more sensitive measure that takes into account the emergence of skills and the child's ability to learn, not just the final speech product. A standardized decision matrix is used to determine the progression of prompts and cues, and the speech environment complexity. A low score of “1” is best and indicates that the child produces the target sound independently (i.e. with no instructions or verbal cues) in connected speech. In contrast, a high score indicates that many support strategies were needed by the child for production of a single sound in isolation. By assessing a child’s responsiveness in greater detail with the GDAP, it is possible to measure how a child responds to cues across a range of systematically varied linguistic contexts. The GDAP matrix can be administered via paper and pencil, or easily through the ATP Online interface. The GDAP has 49 items, including 2 multisyllabic words, 22 initial phonemes, 21 final phonemes, 3 initial blends, and 1 final blend. Sound classes represented in the GDAP include:

  • - Glides
  • - Nasals
  • - Stops
  • - Velars
  • - Stridents
  • - Interdentals
  • - Liquids

Each item is tested in up to three speech environments using vibrant, child-friendly images:

  • - Single Word
  • - Two-Word Sentence
  • - Connected Speech

The GDAP was normed on a representative sample of 880 children ages 3.0 through 10.11.

Includes: 25 Record Forms

More Information
Item # YAT-125
Grade Level Preschool, Elementary, Middle School
Series Other
Format Professional Resource
Topic Language
Age 3 - 5, 5 - 8, 8 - 12, 12 - 15
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