School of Exercise and Nutritional Sciences, San Diego State University, San Diego, CA 92182, USA.
Percept Mot Skills. 2011 Feb;112(1):172-82. doi: 10.2466/04.10.13.PMS.112.1.172-182.
The study investigated how children with heavy prenatal alcohol exposure regulate movement speed and accuracy during goal-directed movements. 16 children ages 7 to 17 years with confirmed histories of heavy in utero alcohol exposure, and 21 nonalcohol-exposed control children completed a series of reciprocal tapping movements between two spatial targets. 5 different targets sets were presented, representing a range of task difficulty between 2 and 6 bits of information. Estimates of percent error rate, movement time, slope, and linear fit of the resulting curve confirmed that for goal-directed, reciprocal tapping responses, performance of the group with prenatal alcohol exposure was described by a linear function, as predicted by Fitts' law, by sacrificing movement accuracy. The index of performance was the same for the two groups: it initially increased, then leveled off for more difficult movements.
这项研究调查了暴露于大量产前酒精的儿童在目标导向运动中如何调节运动速度和准确性。16 名年龄在 7 至 17 岁之间的儿童有明确的宫内酒精暴露史，21 名未接触酒精的对照儿童完成了一系列在两个空间目标之间的交互敲击运动。呈现了 5 个不同的目标集，代表了从 2 到 6 个信息位的任务难度范围。对错误率、运动时间、斜率和所得曲线线性拟合的估计证实，对于目标导向的交互敲击反应，如 Fitts 定律所预测的那样，产前酒精暴露组的表现可以用线性函数来描述，即牺牲运动准确性。两组的性能指标相同：最初增加，然后对于更困难的运动趋于平稳。
