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A systematic review on diagnostic procedures for specific language impairment: The sensitivity and specificity issues
Toktam Maleki Shahmahmood1, Shohreh Jalaie2, Zahra Soleymani3
1Department of Speech Therapy, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran; Department of Speech Therapy, Faculty of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran.
Summary
Accurate identification of specific language impairment (SLI) in preschoolers requires careful consideration of diagnostic test sensitivity and specificity. This review highlights variability in current measures, underscoring the need for validated diagnostic tools.
Area of Science:
- Developmental Psychology
- Speech-Language Pathology
- Pediatric Diagnostics
Background:
- Accurate identification of specific language impairment (SLI) in preschool children is crucial but challenging.
- Existing diagnostic tools vary in their psychometric properties, often lacking sufficient sensitivity and specificity for reliable diagnosis.
- This study aimed to identify tests with acceptable sensitivity and specificity for diagnosing SLI in preschoolers.
Approach:
- A comprehensive literature search was conducted in major bibliographic databases from 2000 to August 2015.
- Keywords included "specific language impairment" (SLI), "primary language impairment" (PLI), and terms related to diagnostic accuracy (diagnosis, identification, accuracy, sensitivity, specificity).
- Citation and reference list reviews supplemented the database search.
Key Points:
- Analysis of 23 studies revealed significant variability in the accuracy of diagnostic measures for SLI.
- Sensitivity ranged from 16% to 100%, while specificity varied from 14% to 100%.
- No single reference standard currently exists for the definitive diagnosis of SLI in preschool-aged children.
Conclusions:
- The wide range in test sensitivity and specificity emphasizes the need to evaluate diagnostic power before clinical application.
- Some promising tests show potential for SLI diagnosis in preschoolers, but further validation is required.
- A standardized reference measure for SLI diagnosis in this age group remains an unmet need.
