Grose J H, Hall J W, Gibbs C
Division of Otolaryngology/Head & Neck Surgery, School of Medicine, University of North Carolina, Chapel Hill.
J Speech Hear Res. 1993 Apr;36(2):351-6. doi: 10.1044/jshr.3602.351.
This study investigated the development of temporal resolution as a function of frequency region using a modified masking period pattern paradigm. This paradigm also allowed age-dependent comparisons of within-channel (temporal resolution) versus across-channel (comodulation masking release [CMR]) processing of temporal information to be made in the same listeners. The results indicated that temporal resolution improves with age. At low frequencies, this improvement continues beyond 10 years of age, whereas at high frequencies performance approaches adult levels by about age 6. Although it is reasonable to expect an association between CMR and temporal acuity, the measure of CMR did not show a significant age effect. The possibility was raised that the poorer temporal resolution of children may not reflect simply a deficiency in peripheral processing of temporal information.
本研究使用一种改良的掩蔽期模式范式，调查了作为频率区域函数的时间分辨率的发展情况。该范式还允许在同一听众中对时间信息的通道内（时间分辨率）与通道间（共调制掩蔽释放[CMR]）处理进行年龄依赖性比较。结果表明，时间分辨率随年龄增长而提高。在低频时，这种改善在10岁以后仍会持续，而在高频时，大约在6岁时性能接近成人水平。尽管预期CMR与时间敏锐度之间存在关联是合理的，但CMR测量并未显示出显著的年龄效应。有人提出，儿童较差的时间分辨率可能并不简单地反映其外周时间信息处理方面的缺陷。
