Zeskind P S, Parker-Price S, Barr R G
Department of Psychology, Virginia Polytechnic Institute and State University, Blacksburg 24061.
Dev Psychobiol. 1993 Sep;26(6):321-33. doi: 10.1002/dev.420260603.
The purpose of the present study was to examine the temporal morphology and rhythmic structure underlying the repeated bursts of expiratory sounds in a sustained bout of crying of twenty-three 1-month-old infants. Durations of expiratory sounds and bursts were determined from a 90-s bout of naturally occurring cries recorded in the home before feeding. Results indicated wide individual differences in temporal morphology between infants and within infant cry sounds. Binary spectrum analysis of the presence of expiratory sounds in the cry sound detected rhythms in temporal organization at a wide range of dominant frequencies. Spectral complexity (higher numbers of peaks in the power spectrum) was related to a longer time since infants were last fed and shorter expiratory sounds. Results emphasize the importance of viewing cries of young infants as dynamic signals. An ontogenetic history of the rhythms of infant cry sounds may contribute to understanding organismic and environmental experiences which contribute to development.
本研究的目的是考察23名1月龄婴儿持续哭闹时反复出现的呼气声阵的时间形态和节奏结构。呼气声和呼气声阵的时长是根据喂食前在家中记录的90秒自然哭闹确定的。结果表明，婴儿之间以及婴儿哭声内部在时间形态上存在很大的个体差异。对哭声中呼气声的存在进行二元频谱分析，发现在广泛的主导频率范围内，时间组织存在节奏。频谱复杂性（功率谱中峰值数量较多）与婴儿上次喂食后较长的时间和较短的呼气声有关。结果强调了将幼儿哭声视为动态信号的重要性。婴儿哭声节奏的个体发生史可能有助于理解有助于发展的机体和环境体验。
