学习障碍儿童筛查量表区域性实施的信度与效度分析

目的对学习障碍儿童筛查量表（PRS）区域性实施的效度和信度进行分析,为学习障碍儿童筛查量表的广泛推广使用提供依据。方法采用分层整群随机抽样方法 ,抽取湛江市区4所小学1～6年级学生3991名,应用修订版《学习障碍儿童筛查量表》（PRS）进行调查,其后进行信度和效度检验。结果该量表除1个功能区的α信度系数为0.84外,其余4个功能区α信度系数均在0.90以上;言语型和非言语型部分α信度系数均在0.95以上;该量表用于筛检学习障碍儿童（LD）的灵敏度、特异度分别为70.2%和83.6%,ROC曲线下面积为0.821。因子分析从量表析出4个因子,即言语性因素、社会适应因素、时间方位因素和操作性因素。湛江市区学习障碍儿童的筛出率为10.3%,男童高于女童。结论 PRS量表区域性实施具有理想的信度和效度,适用于团体筛查LD儿童。

Reliability and validity of revised pupil rating scale in regional implementation of learning disability screening

Objective To explore the reliability and validity of revised pupil rating scale（PRS）in regional implementation of learning disability screening.Methods A total of 3 991 pupils were selected from four primary schools of urban Zhanjiang with stratified cluster random sampling method.The modified PRS were used and evaluated for reliability and validity.Results The coefficients of reliability（α）were higher than 0.90 for four functional regions and 0.84 for one region.The coefficients of reliability（α）were higher than 0.95 for both verbal and non-verbal sections.The sensitivity and specificity of PRS were 70.2% and 83.6%,respectively.The area under the ROC was 0.821.PRS has four main factors,including verbal,social adaptation,time and orientation as well as operation.The learning disability was found in 10.3% of the participants.Conclusion The PRS had good reliability and validity in its regional implementation.It is helpful for group screening of learning disabilities.