Cranford J L, Morgan M, Scudder R, Moore C
Department of Communicative Disorders & Sciences, Wichita State University, KS 67208.
J Speech Hear Res. 1993 Apr;36(2):424-30. doi: 10.1044/jshr.3602.424.
Recent investigations (Cranford, Boose, & Moore, 1990a,b; Moore, Cranford, & Rahn, 1990) studied the ability of normal adult subjects to localize sounds under conditions that elicit the Precedence Effect. In different tests, subjects were required either to report the perceived location of a stationary fused auditory image (FAI) or track the apparent motion of a "moving" FAI. Movement of the FAI was simulated by incrementally varying the delay between pairs of clicks presented, one each, from two matched loudspeakers placed on opposite sides of the listener. In the present study, groups of normally developing children, ranging in age from 6 to 12 years of age, were tested with these two procedures. Although subjects performed at normal adult levels with the stationary FAI test, a significant age-related trend was observed with the moving FAI test. The younger children exhibited poorer tracking performances than did the older children. These results provide evidence that significant changes in binaural temporal processing abilities may occur in the early childhood years.
近期的研究（克兰福德、布斯和摩尔，1990年a、b；摩尔、克兰福德和拉恩，1990年）研究了正常成年受试者在引发优先效应的条件下定位声音的能力。在不同的测试中，受试者被要求报告静止融合听觉图像（FAI）的感知位置，或者追踪“移动”FAI的表观运动。通过逐渐改变从放置在听众两侧的两个匹配扬声器中依次发出的一对咔嗒声之间的延迟，来模拟FAI的运动。在本研究中，对年龄在6至12岁之间的正常发育儿童组进行了这两种测试。尽管受试者在静止FAI测试中的表现达到了正常成人水平，但在移动FAI测试中观察到了明显的与年龄相关的趋势。年幼儿童的追踪表现比年长儿童差。这些结果提供了证据，表明双耳时间处理能力可能在幼儿期发生显著变化。
