Courage Mary L, Reynolds Greg D, Richards John E
Department of Psychology, Memorial University, Canada.
Child Dev. 2006 May-Jun;77(3):680-95. doi: 10.1111/j.1467-8624.2006.00897.x.
To examine the development of look duration as a function of age and stimulus type, 14- to 52-week-old infants were shown static and dynamic versions of faces, Sesame Street material, and achromatic patterns for 20 s of accumulated looking. Heart rate was recorded during looking and parsed into stimulus orienting, sustained attention, and attention termination phases. Infants' peak look durations indicated that prior to 26 weeks there was a linear decrease with age for all stimuli. Older infants' look durations continued to decline for patterns but increased for Sesame Street and faces. Measures of heart rate change during sustained attention and the proportion of time spent in each phase of attention confirmed infants' greater engagement with the more complex stimuli.
为了研究注视时长随年龄和刺激类型的发展变化，对14至52周大的婴儿展示了静态和动态的面部、《芝麻街》素材以及消色差图案，累计注视时长为20秒。在注视过程中记录心率，并将其划分为刺激定向、持续注意和注意终止阶段。婴儿的峰值注视时长表明，在26周之前，所有刺激的注视时长均随年龄呈线性下降。年龄较大婴儿对图案的注视时长持续下降，但对《芝麻街》素材和面部的注视时长则增加。持续注意期间的心率变化测量以及在每个注意阶段所花费时间的比例证实，婴儿对更复杂刺激的参与度更高。
