1 University of Amsterdam, Amsterdam, Netherlands.
2 Yield, Research Institute of Child Development and Education, Amsterdam, Netherlands.
Assessment. 2019 Sep;26(6):1070-1083. doi: 10.1177/1073191117698754. Epub 2017 Mar 23.
Items of the Resistance to Peer Influence Questionnaire (RPIQ) have a tree-based structure. On each item, individuals first choose whether a less versus more peer-resistant group best describes them; they then indicate whether it is "Really true" versus "Sort of true" that they belong to the chosen group. Using tree-based item response theory, we show that RPIQ items tap three dimensions: A Resistance to Peer Influence (RPI) dimension and two Response Polarization dimensions. We then reveal subgroup differences on these dimensions. That is, adolescents with mild-to-borderline intellectual disability, compared with typically developing adolescents, are less RPI and more polarized in their responses. Also, girls, compared with boys, are more RPI, and, when high RPI, more polarized in their responses. Together, these results indicate that a tree-based modeling approach yields a more sensitive measure of individuals' RPI their tendency to respond more or less extremely.
同伴影响力抵制问卷（RPIQ）的项目具有树状结构。在每个项目中，个体首先选择一个更能抵制同伴影响的群体来描述自己，然后表明他们是否属于所选群体是“真的如此”还是“有点如此”。使用基于树的项目反应理论，我们表明 RPIQ 项目可以挖掘三个维度：抵制同伴影响（RPI）维度和两个响应极化维度。然后，我们揭示了这些维度上的亚组差异。也就是说，与典型发展的青少年相比，轻度至边缘智力障碍的青少年在 RPI 方面较低，在反应上更加极化。此外，与男孩相比，女孩在 RPI 方面更高，当 RPI 较高时，她们的反应更加极化。总的来说，这些结果表明，基于树的建模方法可以更敏感地衡量个体的 RPI——他们的反应倾向更极端或不那么极端。
