the comparison of laterality pattern of language perception in down syndrome and typical children

the purpose of the present study is the comparison of the pattern of language perception in down syndrome (ds) children and typical children. to achieve the objective, nine subjects with ds (whose mental ages were 72-78 months and were drawn from five center of special education in the city of mashhad) and five typical children with the same mental ages were selected through random sampling; and after the controlling of the associated variables. in this study after the selecting right-handed children by using the annet handedness questionnaire, electroencephalogram (eeg) technique was employed for investigating the laterality pattern of language perception through recording of the voltage of brain waves in brain cortex (temporal regions) in two states: resting and listening to a story. the obtained data were analyzed using descriptive and inferential statistics. the results indicated that the mean voltage of brain waves in cerebral hemispheres is different between two groups in each of the two states.