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贝叶斯因果关系网络模型在断面调查数据中的应用 被引量:3
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作者 范丽珺 游顶云 +1 位作者 张旺 李康 《中国医院统计》 2010年第2期97-100,共4页
目的验证贝叶斯网络能否从横断面调查数据的分析中得到因果关系的信息。方法通过从国外数据库获取的调查数据,利用R语言进行贝叶斯网络因果关系的结构分析。结果在无先验信息情况下,从网络结构中得出,胰岛素对空腹血糖、收缩压有一... 目的验证贝叶斯网络能否从横断面调查数据的分析中得到因果关系的信息。方法通过从国外数据库获取的调查数据,利用R语言进行贝叶斯网络因果关系的结构分析。结果在无先验信息情况下,从网络结构中得出,胰岛素对空腹血糖、收缩压有一定的调控关系,HDL对总胆固醇的代谢也起到一定的调控作用,以上关系与文献研究结果一致;总胆固醇、LDL、HDL、apoB均指向甘油三酯,此关系有待解释。结论与其他统计方法相比,贝叶斯网络能够从横断面调查数据中得到因果关系的重要信息,为了解疾病机理、探索疾病病因提供了新的有效方法。 展开更多
关键词 贝叶斯网络 因果关系 横断面调查数据
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The Behavioral Consequences of Parents Presumed Media Influence on Restrictive Mediation and Co-viewing/Using Media
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作者 Gabriella Sandstig, Bengt Johansson Karin Ringsberg 《Journalism and Mass Communication》 2013年第7期452-463,共12页
This study aims to fertilize research on parental mediation with the importance of parents' media attitudes in terms of parental third-person effects and its varieties. The explanatory power of these perceptions on b... This study aims to fertilize research on parental mediation with the importance of parents' media attitudes in terms of parental third-person effects and its varieties. The explanatory power of these perceptions on behavioral consequences as types of parental mediation is analyzed with control for previously known factors. Data from a cross-sectional population survey in Sweden 2011 covered a representative sample of children, aged 2-17 years in total 1461. The results show that the parental second-person perceptions explain (i.e., general belief in media effects) more than parental third-person perceptions. Parental second-person perceptions together with the age of the child explain most of the restrictive mediation and the effects of parental second-person perceptions on restrictive mediation increase with the parents lesser control of the media type. 展开更多
关键词 parental third-person effects parental second-person perceptions parental mediation children
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