Investigating the Effectiveness of Morphosyntactic Treatment on Production in Two Children with Hearing Impairment Older Than 3 Years

Introduction: Since hearing loss (HL) can lead to linguistic and especially morphosyntactic (MS) delay, creating a method for fostering and facilitating MS development is required. Accordingly, the auditory-based Sayeh Tahbaz Hoseynzadeh (STH)-method has been designed. Accordingly, the present article examines the effectiveness of this treatment. Case Description: Two hearing-impaired children (HIC) who used hearing aids, with moderately severe and severe HL and older than 3 years of age at the time of study, enrolled in the STH method for 24 weeks. The Persian developmental sentence scoring was used to analyze language samples together with some formal and informal assessments performed within a 12-week interval. Results: According to the Persian developmental sentence scoring used to analyze spontaneous language samples, the score of participant 1 changed from 0 to 10.6 and the score of participant 2 improved from 5 to 7.4 in the final assessment. Conclusion: The findings showed that STH-method helped in improving the MS skills of the participants.