Frick Janet E, Richards John E
Department of Psychology University of Georgia.
Department of Psychology University of South Carolina.
Infancy. 2001 Jul;2(3):331-352. doi: 10.1207/S15327078IN0203_3. Epub 2001 Jul 1.
Infants' recognition memory has been shown to be related to individual differences in look duration and level of heart period variability. This study examined the effect of individual differences in these 2 measures on infants' recognition of briefly presented visual stimuli using a paired-comparison recognition-memory paradigm. A sample of 35 full-term infants was studied longitudinally at 14, 20, and 26 weeks of age. Recognition memory for briefly presented stimuli was tested in 6 experimental conditions, with delays corresponding to different heart-rate-defined phases of attention. The 20-and 26-week-old infants, and infants with high levels of heart period variability, generally showed more evidence of recognition memory for briefly presented visual stimuli. Greater evidence of recognition memory was observed when stimuli were presented during sustained attention. Infants with more mature baseline physiological responses show greater evidence of recognition memory, and stimulus and procedural factors may be more important for the study of individual differences in infant visual attention than has previously been suggested.
婴儿的识别记忆已被证明与注视时长和心率变异性水平的个体差异有关。本研究使用配对比较识别记忆范式，考察了这两种测量方法中的个体差异对婴儿识别短暂呈现视觉刺激的影响。对35名足月婴儿在14周、20周和26周龄时进行了纵向研究。在6种实验条件下测试了对短暂呈现刺激的识别记忆，延迟对应于不同心率定义的注意力阶段。20周和26周龄的婴儿以及心率变异性水平较高的婴儿，通常表现出更多对短暂呈现视觉刺激的识别记忆证据。当刺激在持续注意力期间呈现时，观察到更多的识别记忆证据。具有更成熟基线生理反应的婴儿表现出更多的识别记忆证据，并且刺激和程序因素对于研究婴儿视觉注意力的个体差异可能比之前认为的更为重要。
