Levarlet-Joye H, Rantzau M
Padiatr Padol. 1984;19(3):225-33.
The study was carried out on 16 normal children and 16 slightly mentally handicapped children aged 9 years and 10 months. We studied: simple reaction time and simple and complex choice reaction time for the hand and foot. Hand and foot lateralities were determined using six tests. This study enabled us to show different elements: Hand and foot laterality is less often confirmed among the handicapped children. For both groups the fastest hand and foot simple reaction times do not indicate the preferred limb. The possibility of choice in the case of the hand considerably delays the reaction times for the handicapped children. This tendency is not confirmed in the case of choice reaction times for the foot, where the handicapped children are not significantly slower than the normal children, in a choice situation. If the choice situation becomes complicated the handicapped children are slower than the normal children. With the normal children simple reaction times are slower for the foot than for the hand. However, the handicapped children do not show a significant difference between hand and foot reaction times. We put forward the theory that this fact could be explained by the different form of the motor response. Handicapped children have greater difficulty in integrating precision and speed of movement, factors which occur in the movement of the hand reaction time but not in the movement of the foot reaction time.
该研究针对16名9岁10个月大的正常儿童和16名轻度智力障碍儿童展开。我们研究了：手部和足部的简单反应时间以及简单和复杂选择反应时间。通过六项测试确定了手部和足部的偏侧性。这项研究使我们能够展现出不同的因素：在残疾儿童中，手部和足部的偏侧性较少得到证实。对于两组儿童而言，最快的手部和足部简单反应时间并未表明偏好的肢体。对于残疾儿童来说，手部选择的可能性会显著延迟反应时间。在足部选择反应时间的情况下，这种趋势并未得到证实，在选择情境中，残疾儿童并不比正常儿童明显更慢。如果选择情境变得复杂，残疾儿童会比正常儿童更慢。对于正常儿童来说，足部的简单反应时间比手部更慢。然而，残疾儿童的手部和足部反应时间之间没有显著差异。我们提出理论，认为这一事实可以通过运动反应的不同形式来解释。残疾儿童在整合运动的精准度和速度方面有更大困难，这些因素出现在手部反应时间的运动中，但不出现在足部反应时间的运动中。
