Greenwald C A, Leonard L B
Am J Ment Defic. 1979 Nov;84(3):296-303.
Imperative and declarative performative behavior was examined in nonretarded and Down's syndrome children operating at two stages of sensorimotor intelligence. In both groups, more advanced types of performative behavior generally associated with a higher sensorimotor stage. Relative to the nonretarded children of the same sensorimotor stages, the Down's syndrome children relied more heavily on gestures in their imperative and declarative usage. Evidence was also obtained suggesting that the correspondence between sensorimotor stage and performative behavior is closer at younger ages than at older ages.
在处于感觉运动智力两个阶段的非智障儿童和唐氏综合征儿童中，对祈使性和陈述性施为行为进行了研究。在两组中，更高级类型的施为行为通常与更高的感觉运动阶段相关。相对于处于相同感觉运动阶段的非智障儿童，唐氏综合征儿童在祈使性和陈述性用法中更依赖手势。还获得了证据表明，感觉运动阶段与施为行为之间的对应关系在较年幼时比在较年长时更为紧密。
