Methods To find out the LD children in the whole school, do the VRT test on the LD team and paired control team, then analysis the data of the VRT score.
方法对某小学校的学习障碍（LD）儿童进行了筛查，并对筛出的LD 儿童和配对的正常儿童进行视觉保持实验（VRT）测试，并对比分析数据。
The paired t test was adopted to compare the intergroup difference of measurement data. Line correlation analysis was applied to dispose the relativity among the indexes.
计量资料组间差异比较采用配对t检验，各指标间的相关性处理采用直线相关分析。
The paired t test was adopted to compare the intergroup difference of measurement data. Line correlation analysis was applied to dispose the relativity among the indexes.
计量资料组间差异比较采用配对t检验，各指标间的相关性处理采用直线相关分析。
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