A concise Description of Non-linguistic features (Such as Familial, educational and Health information) and linguistic skills in hard of hearing children will be helpful in compensating for their disabilities. In the current study we studied 75 school-Children with average hearing Thresholds of 55-70dB in better ear. All the subjects aged between 8-16years-old with the average age of 11.04.We studied 27 non-linguistic variables by using questionnaire and 32 grammatical variables by studying evoked speech in the participants. The average utterance length of the subjects was estimated 2.763 words. 29% of the all participants' utterances was accurate and just 16.3% of the verbs were produced accurately.One of the most common errors in sentence and verb level, was the mistaken ably omitting of the structural features, the tense problem of the verb and also the mismatching between subject and verb. We also observed a significant correlation between some non-linguistic features such as grade, previous education in conventional schools and the rate of hearing aid usage and the number of accurate utterances in participants.

Background and Aim: Studies have shown that most children before age 4 are able to comprehend and express wh-question. In the Persian language, a case study has confirmed these results. The aim of this study is to evaluate the ability of 4-6 year olds to comprehend and express wh-question.
Methods: Seventy two 4-6 year-old Persian-speaking children were selected randomly. Wh-words consist of: what, where, who, why, and when. In the part of comprehension subjects answered questions about two pictures, and in the part of expression they asked questions elicited by a speaking puppet about four pictures. Descriptive analysis and student&aposs t-test were used for data analysis.
Results: In comprehension 4-6 year-old children gained the complete score (2) with SD=0 in all wh-words. However, 4-5 year old children gained the score of 1.89 with SD of 0.32 for the word when. In expression, independent t-test showed the maximum score of 3.52 with SD of 0.84 related to questions with who. 5-6 and 4-5 year old subjects had significant differences in questions with what (p=0.005), where (p=0.003), who (p=0.012), and when (p<0.001). Most errors were expressed in question with when.
Conclusion: Subjects of this study had the ability to comprehend and express wh-words. Comprehension of wh-words is easy for 4-6 year-old children they are able to use them in questions, but have some application errors.