Comparing countries according to their PISA results can be considered cross-cultural studies. An important issue in these studies is that the measurement tools must be culturally and linguistically equivalent. Cultural or linguistic differences in measurement tools may threaten validity. Aberrant behavior is another important factor that affects validity. Person-fit analysis is a statistical method of detecting aberrant individual behavior. This study investigated the effects of students who were flagged as aberrant on a comparison of Turkish and Dutch students’ non-cognitive outputs towards science in the PISA 2015. Whether the items contained differential item functioning (DIF) or not was determined by a Poly-SIBTEST for each scale. Misfit students were detected by non-parametric G_N^p and U3^p statistics. It was determined that flagged students were not effective for comparing the mean of non-cognitive outputs towards science, but it was observed that flagged students had an effect on DIF.

根据 PISA 结果比较国家可以被视为跨文化研究。这些研究中的一个重要问题是测量工具必须在文化和语言上是等效的。测量工具中的文化或语言差异可能会威胁到有效性。异常行为是影响效度的另一个重要因素。人员匹配分析是一种检测异常个人行为的统计方法。本研究调查了被标记为异常的学生对 2015 年 PISA 中土耳其和荷兰学生对科学的非认知输出的比较的影响。每个量表的 SIBTEST。不合适的学生被非参数G _N ^p检测到和U3 ^p统计。已确定被标记的学生对于将非认知输出的平均值与科学进行比较无效，但观察到被标记的学生对 DIF 有影响。