USDA/ARS Children's Nutrition Research Center, Baylor College of Medicine, Houston, TX, USA.
Int J Behav Nutr Phys Act. 2013 Apr 2;10:41. doi: 10.1186/1479-5868-10-41.
Use multidimensional polytomous item response modeling (MPIRM) to evaluate the psychometric properties of a television (TV) parenting practices (PP) instrument. Perform differential item functioning (DIF) analysis to test whether item parameter estimates differed across education, language, or age groups.
Secondary analyses of data from three studies that included 358 children between the ages of 3 and 12 years old in Houston, Texas. TV PP included 15 items with three subscales: social co-viewing, instructive parental mediation, and restrictive parenting. The multidimensional partial credit model was used to assess the performance. DIF was used to investigate the differences in psychometric properties across subgroups.
Classical test theory analyses revealed acceptable internal consistency reliability (Cronbach's α: 0.72 to 0.83). More items displaying significant DIF were found across children's age groups than parental education or language groups. A Wright map revealed that items covered only a restricted range of the distribution, at the easier to respond end of the trait.
TV PP scales functioned differently on the basis of parental education, parental language, and child age, with the highest DIF among the latter. Additional research is needed to modify the scales to minimize these moderating influences. Some items may be age specific.
使用多维多项反应模型（MPIRM）评估电视（TV）养育实践（PP）工具的心理计量学特性。进行差异项目功能（DIF）分析，以测试项目参数估计是否因教育、语言或年龄组而异。
对德克萨斯州休斯顿的三项研究中 358 名 3 至 12 岁儿童的数据进行二次分析。TV PP 包含 15 个项目，分为三个分量表：社会共同观看、有指导的父母调解和限制养育。多维部分信用模型用于评估性能。DIF 用于调查子组之间心理计量特性的差异。
经典测试理论分析显示可接受的内部一致性可靠性（Cronbach's α：0.72 至 0.83）。在儿童年龄组中发现了更多显示出显著 DIF 的项目，而不是在父母教育或语言组中。赖特图谱显示，项目仅涵盖特质的易响应端的受限分布范围。
基于父母教育、父母语言和儿童年龄，电视 PP 量表的功能不同，后者的 DIF 最高。需要进一步研究以修改量表，以最小化这些调节影响。一些项目可能是特定于年龄的。
