Kraft R H
Neuropsychologia. 1981;19(5):696-705. doi: 10.1016/0028-3932(81)90007-5.
Eighty right-handed males (6-12 yr of age) stratified into age x degree of handedness x family history of handedness groups were administered three dichotic (digit, syllable, environmental sound) tests. Older subjects accurately identified more stimuli than the younger subjects across tasks. There were significantly laterality differences for both verbal and nonverbal stimuli between family history of handedness groups regardless of the subjects' age and degree of handedness. Those subjects with familial sinistrality had attenuated right-side advantage for verbal and non-verbal stimuli and decreased nonverbal accuracy scores compared to the familial dextral subjects who evidenced at right-ear (left hemisphere) advantage for verbal stimuli and a left-ear (right hemisphere) advantage for nonverbal.
八十名右利手男性（6至12岁）被分为年龄×利手程度×利手家族史组，并接受了三项双耳分听测试（数字、音节、环境声音）。在各项任务中，年长受试者比年轻受试者能更准确地识别更多刺激。无论受试者的年龄和利手程度如何，利手家族史组之间在言语和非言语刺激方面均存在显著的偏侧性差异。与家族性右利手受试者相比，那些有家族性左利手的受试者在言语和非言语刺激方面右侧优势减弱，非言语准确性得分降低，家族性右利手受试者在言语刺激方面表现为右耳（左半球）优势，在非言语刺激方面表现为左耳（右半球）优势。
