ABSTRACT
In speech therapy, treatment efficacy includes 3 specific fields as treatment effectiveness, efficiency and effects. Treatment efficiency compares two approaches or more with each other. The aim of this study was to compare of two approaches: general language stimulation and developmental-descriptive approach. It has been done as an interventional-longitudinal study with14 participants [primary school students with hearing loss] for two educational years. All changes in different parts of language were assessed by decontextualized language test, storytelling, action verb and sentence writing in the end of each year. Total number of affixes in storytelling, derivational suffix in action verb test, expression of prepositions and adverb [location] as well as perception superlative adjective in decontextualized language test had statistically significant changes [P<0.05]. Findings show developmental-descriptive approach has more positive effects because of specificity of language treatment goals.