GAP DETECTION IN INFANTS, CHILDREN, AND ADULTS
GAP DETECTION IN INFANTS, CHILDREN, AND ADULTS
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DOI：
10.1121/1.414396
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发表时间：
1995-11-01
影响因子：
2.4
通讯作者：
HENDERSON, JL
中科院分区：
文献类型：
--
作者：
TREHUB, SE;SCHNEIDER, BA;HENDERSON, JL
年龄分别为6.5个月、12个月、5岁和21岁的受试者被要求区分一对500 Hz的高斯包络音调和一个持续时间和总能量相同的短500 Hz音调。对6.5个月大的婴儿组进行了单间隙持续时间测试：8、12、16、20、28或40 ms。还对12个月大的婴儿组进行了单间隙持续时间测试：8，12，16，或20毫秒。5岁的儿童和成人进行了测试的间隙持续时间为8，12，6.5月龄的平均成绩在除8 ms外的所有间隙持续时间上均显著超过机会水平，12月龄的平均成绩在所有间隙持续时间上均高于机会水平。对于5岁的儿童和成人，平均性能也超过了所有的差距持续时间测试的机会水平。成人的表现显着优于5岁的儿童的间隙持续时间为12和16毫秒。间隙检测阈值，定义的性能标准为d '= 0.5，估计为11，5.6，和5.2毫秒的婴儿，儿童和成人，分别。这是可能的，在本研究中较小的成人-婴儿的差异相比，在以前的研究中报告的干我们使用的高斯包络音点和随之而来的适应效应最小化。(C)1995年美国声学学会。
Listeners who were 6.5 months, 12 months, 5 years, and 21 years of age were required to discriminate a pair of 500-Hz, Gaussian-enveloped tone pips from a short 500-Hz tone of the same duration and total energy. Groups of 6.5-month-old infants were tested on a single gap duration: 8, 12, 16, 20, 28, or 40 ms. Groups of 12-month-olds were also tested on a single gap duration: 8, 12, 16, or 20 ms. The 5-year-old children and adults were tested on gap durations of 8, 12, and 16 ms. The mean performance of 6.5-month-olds significantly exceeded chance levels on all gap durations except 8 ms, and that of 12-month-olds was above chance levels on all gap durations. For 5-year-old children and adults, mean performance also exceeded chance levels for all gap durations tested. Adults performed significantly better than 5-year-old children on gap durations of 12 and 16 ms. Gap-detection thresholds, defined by a performance criterion of d'=0.5, were estimated at 11, 5.6, and 5.2 ms for infants, children, and adults, respectively. It is likely that smaller adult-infant differences in the present study compared to those reported in previous research stem from our use of Gaussian-enveloped tone pips and the consequent minimization of adaptation effects. (C) 1995 Acoustical Society of America.