Deaf 200 Research 155 Deaf children 128 Education 124 History 91 Means of communication 67 Sign language 56 Máis ... Hearing impaired children 50 American Sign Language 49 Language 47 Deafness 42 Family relationships 42 Psychological aspects 34 Hearing impaired 33 Study and teaching 33 Testing 29 Auditory perception 25 Politics and government 25 Reading 24 Teachers of the deaf 24 Attitudes 23 Audiometry 22 Speech perception 22 Parent and child 21 Hearing aids 20 Social aspects 20 English language 19 Auditory evoked response 17 Mainstreaming in education 17 Older deaf people 16 menos ...