摘要
本研究旨在探讨智力落后儿童在实验情景下用手抓物的方式、及其与大脑侧偏化的关系。结果表明:(1)智力落后儿童混用手情况多。被试在取物时,使用左手或右手次数的比率平均约为1:2,相当于1—2岁正常儿童用左、右手取物的比率;(2)性别与年龄对落后儿童用手方式无明显影响;(3)病情等级对用手方式有明显影响:轻度智力落后儿童使用左、右手的比率大于中、重度智力落后儿童的同样比率;(4)智力落后儿童抓物的线索在四个实验中不完全相同:实验Ⅰ至Ⅲ的线索为位置(近手),实验Ⅳ为对实验用具的喜爱;(5)在混用手与大脑侧偏化(或优势脑未分化)不完善之间,可能有直接关系。此问题尚需进一步研究。
The purpose of this study is to investigate the handedness of menta-lly retarded children and the relationship between handedness and thecerebral lateralization. 100 mentally retarded children(2-12 years of age)participated in this study. The results show: (1) there is a high-left-handedness phenomenon(ormixed handedness)in mentally retarded childrei. The average ratio of thefrequency of left hand and right hand in giasping behavior of these sub-jects in four experiments was nearly 1:2, very similar to the same ratioof 1-2-year-old normal children's level; (2) sex and age had no significant-influence upon the handedness of retarded children; (3) the level ofretardation is significantly related with handedness. The ratio of the fre-quency of left hand and right hand of mildly retarded children in gras-ping behavior is bigger than that of the same ratio of moderately and se-verely retarded children (4) the cues, which mentally retarded childrenused in grasping objects were different in four experiments: in experime-nts Ⅰ to Ⅲ, position(closeness of hand)was the main cue while in experi-ment Ⅳ, preference, not position, was the main cue: (5) there is a directrelationship between the mixed handedness and the lack of cerebral la-teral specialization or the poor cerebral dominance. This remains an openquestion
出处
《心理学报》
CSSCI
CSCD
北大核心
1991年第3期225-235,共11页
Acta Psychologica Sinica
基金
国家自然科学基金
