Richards J E, Holley F B
Department of Psychology, University of South Carolina, 29208, USA.
Dev Psychol. 1999 May;35(3):856-67. doi: 10.1037//0012-1649.35.3.856.
The effect of attention on smooth pursuit and saccadic tracking was studied in infants at 8, 14, 20, and 26 weeks of age. A small rectangle was presented moving in a sinusoidal pattern in either the horizontal or vertical direction. Attention level was distinguished with a recording of heart rate. There was an increase across age in overall tracking, the gain of the smooth pursuit eye movements, and an increase in the amplitude of compensatory saccades at faster tracking speeds. One age change was an increase in the preservation of smooth pursuit tracking ability as stimulus speed increased. A second change was the increasing tendency during attentive tracking to shift from smooth pursuit to saccadic tracking when the stimulus speed increased to the highest velocities. This study shows that the development of smooth pursuit and targeted saccadic eye movements is closely related to the development of sustained attention in this age range.
研究了注意力对8周、14周、20周和26周龄婴儿平滑跟踪和扫视跟踪的影响。呈现一个小矩形，以正弦模式在水平或垂直方向移动。通过记录心率来区分注意力水平。随着年龄增长，整体跟踪、平滑跟踪眼动增益以及更快跟踪速度下补偿性扫视幅度均有所增加。年龄变化之一是随着刺激速度增加，平滑跟踪能力的保持有所增强。第二个变化是在注意力跟踪过程中，当刺激速度增加到最高速度时，从平滑跟踪转向扫视跟踪的趋势越来越明显。这项研究表明，在这个年龄范围内，平滑跟踪和目标性扫视眼动的发展与持续注意力的发展密切相关。
