Mukari Siti Z, Umat C, Othman Nor I
Department of Audiology and Speech Sciences, Faculty of Allied Health Sciences, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, Kuala Lumpur, Malaysia.
Audiol Neurootol. 2010;15(5):303-10. doi: 10.1159/000283007. Epub 2010 Feb 11.
This study assessed the effects of age and working memory capacity on dichotic listening and temporal sequencing. Double Dichotic Digit Test (DDT), Pitch Pattern Sequence Test (PPST) and Digit Span Test were administered on 40 healthy adults with hearing thresholds of not greater than 30 dB HL across octave frequencies from 250 to 4000 Hz. Twenty young (20-30 years old) and 20 older (50-65 years old) adults were included in the study. Results showed that the older group had significantly lower scores in DDT, PPST and working memory capacity measures than the young subjects. Working memory capacity was positively correlated with PPST but not with DDT, suggesting that DDT might be more auditory-modality-specific than PPST.
本研究评估了年龄和工作记忆容量对双耳分听和时间序列的影响。对40名听力阈值在250至4000 Hz倍频程频率范围内不超过30 dB HL的健康成年人进行了双耳数字测试（DDT）、音调模式序列测试（PPST）和数字广度测试。研究纳入了20名年轻成年人（20 - 30岁）和20名年长成年人（50 - 65岁）。结果显示，年长组在DDT、PPST和工作记忆容量测量中的得分显著低于年轻受试者。工作记忆容量与PPST呈正相关，但与DDT不相关，这表明DDT可能比PPST更具听觉模态特异性。
