LinguiSystems Articulation Test (LAT)
Author(s): Linda Bowers, MA, CCC-SLP / Rosemary Huisingh, MA, CCC-SLP
The LAT is intended for use by speech-language pathologists to identify children and young adults with abnormal articulation patterns and to screen for childhood apraxia of speech. The test evaluates students on all sounds and blends, provides stimulability and intelligibility ratings, and screens for Childhood Apraxia of Speech. It can also be used for progress monitoring in therapy. The Speech Sound Error Analysis helps the examiner analyze the student's speech errors by word location, type, and stimulability. All phonemes tested are included in the Speech Sound Error Analysis.
The LAT was standardized on a nationally representative sample of 3,030 individuals, and an additional sample of 700+ examinees were included in a study comparing the LAT and Goldman-Fristoe Test of Articulation2 (GFTA-2). Validity analysis showed that the LAT significantly discriminates between typically developing individuals and those with speech-sound disorders,with all correlations significant at the .01 level.
Administration and Scoring
The test takes 1520 minutes to administer. Total Number of Errors can be converted to standard scores, percentile ranks, and age equivalents. The Manual helps determine the best therapy approach for each student. Information on the Phonological Processing, Phonological Contrasts, and Core Vocabulary approaches are described, as well as Childhood Apraxia of Speech and Dysarthria.