Department of Otorhinolaryngology, Head & Neck Surgery, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, NT, Hong Kong.
Int J Audiol. 2010 Sep;49(9):651-6. doi: 10.3109/14992021003793942.
Cantonese dichotic digits recognition was evaluated in free-recall, directed-attention right, and directed-attention left response conditions. All participants were right-handed and included a group of young adults with normal hearing and a group of older adults with minimal sensorineural hearing loss. In all conditions, performance by the young adults was better than performance by the older adults. A right-ear advantage was observed for both groups. Due to a greater deficit in dichotic digits recognition performance in the left ear of older subjects their right-ear advantages were larger than those for the young adults. The results support an age-related disadvantage in recognition performance for dichotic stimuli presented to the left ear of older subjects that is not entirely accounted for by differences in hearing sensitivity between subject groups but may be related to a primary cognitive deficit.
粤语双耳分听数字识别在自由回忆、右定向注意和左定向注意的反应条件下进行了评估。所有参与者均为右利手，包括一组听力正常的年轻人和一组听力损失最小的老年人。在所有条件下，年轻人的表现均优于老年人。两组均观察到右耳优势。由于老年人左耳的双耳分听数字识别表现存在更大的缺陷，他们的右耳优势大于年轻人。结果支持了在向老年人左耳呈现双听刺激时，与年龄相关的识别表现的劣势，这种劣势不能完全用受试者组之间听力敏感度的差异来解释，而可能与主要的认知缺陷有关。
