摘要目的：研究6～13岁弱视儿童数字加工过程中的数字距离效应。方法分别将43名视力正常儿童与46名弱视儿童分为7岁组（6～8岁）、9岁组（9～10岁）和12岁组（11～13岁）。本研究采用数字大小判断实验，实验过程中记录被试者错误率与反应时间。结果（1）3个年龄组的正常儿童对数字4的反应时[7岁组（995±100）ms，9岁组（964±141）ms，12岁组（701±125）ms]均长于对数字1的反应时[分别为（882±140）ms，（790±119）ms，（550±41）ms]，差异有统计学意义（ P＜0．05）；对数字6的反应时[分别为（968±116）ms，（918±126）ms，（712±125）ms]均长于对数字9的反应时[分别为（862±121）ms，（774±151）ms，（625±141）ms]，差异有统计学意义（ P＜0．05）。（2）12岁组弱视儿童对数字4的反应时[（942±107）ms]长于对数字1的反应时[（847±136）ms]，差异有统计学意义（ P＜0．05）。（3）随着年龄增长，正常儿童和弱视儿童远数（1／2／8／9）与近数（3／4／6／7）的反应时之差没有明显变化。结论高年龄组弱视儿童感数过程（大于5的数字）存在数字距离效应；弱视儿童的数字加工能力的发展与正常儿童相比更慢。

abstractsObjective To investigate numerical distance effect of numerical processing in amblyopic children aged from 6 to 13. Methods 46 amblyopic children and 43 control children with normal sight were divided into 3 groups respectively:7Y group (6~8 years old),9Y group (9~10 years old) and 12Y group (11~13 years old). The numerical comparison task (judging the magnitude of number) was used in this study and error rate( ER) and reaction times ( RTs) were recorded. Results ( 1) RTs of judging the num-ber 4 (7Y group (995±100)ms,9Y group (964±141)ms,12Y group (701±125)ms) were significant lon-ger(P<0.05) than RTs of judging the number 1((882±140)ms,(790±119)ms,(550±41)ms) in 3 control groups;RTs of judging the number 6((968±116)ms,(918±126)ms,(712±125)ms) were significant lon-ger(P<0.05) than RTs of judging the number 9((862±121)ms,(774±151)ms,(625±141)ms). (2) In the 12Y group of amblyopic children:RTs of judging the number 4((942±107)ms) were significant longer (P<0.05) than RTs for judging the number 1((847±136)ms). (3) No developmental significant difference was found neither within the control children nor within amblyopic children using the RTs D-values which gained by the RTs of far distant numbers ( 1/2/8/9 ) minus close distant numbers ( 3/4/6/7 ) . Conclu-sion Only 12Y group of amblyopic children show numerical distance effect in subitizing(>5).The develop-ment of numerical processing in amblyopic children is slower than that in children with normal sight.