Glaspey Dynamic Assessment of Phonology (GDAP)
Author: Amy Glaspey, PhD, CCC-SLP
- Speech Sounds
- Ages 3 through 10
- Testing Time: 2-3 minutes/phoneme
- Individual Administration
- Qualification Level B
The Glaspey Dynamic Assessment of Phonology is the first standardized, dynamic assessment of speech production and stimulability. This ground-breaking 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.
Assesses the amount of help a child needs to correctly say sounds or patterns that have been produced in error.
Employs a unique 15-point cueing hierarchy for 24 phonemes in initial and final position, syllable patterns, and consonant clusters. (The 15-point scale represents the number of scaffolds available to the child in the production of a phoneme.)The GDAP is the first standardized computer-assisted, 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 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:
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.
Administration and Scoring
The GDAP is designed to be administered flexibly to get a comprehensive assessment of a child’s speech production or to document a child’s response to therapy for individual phonemes or sound classes. Each phoneme can be quickly administered in 2-3 minutes. The Phonetic Inventory which can be administered prior to the GDAP to document the phonemes already in the child’s repertoire, thereby reducing testing time.
The GDAP is currently in production and will be available in late Fall 2018.
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