Bullying is a social phenomenon that impacts a large number of children and young people, worldwide. This study aimed to longitudinally examine the development of bullying and victimization in Chinese students in grades 4, 5, and 6. We used latent class analysis to empirically identify groups of youth with different bullying and victimization patterns, and then used latent transition analysis t...

This prospective study examined the prognostic value of the Big Five personality model for changes in comorbidity patterns of emotional disorders both from a person- and trait-centered perspective. Moreover, it is investigated whether the predictive effect of personality can be attributed to symptom severity at baseline. We followed a cohort of 2566 persons (18-65 years) recruited in primary an...

本研究は，COVID-19流行下における国内旅行実施や目的地選択において重要視する要因を首都圏，近畿圏，東北地方でのWebアンケート調査データにより明らかにした．COVID-19の罹患を危惧するサンプルが74%を占め，今後1年以内の国内観光旅行実施意向を有するのは36％にとどまった．さらに，目的地選択理由の回答組み合わせパターンを抽出できる潜在クラス分析を適用した結果，9クラスに分類できること，感染症対策に関連する全要因を考慮するクラスが最も構成比率が高く(35％)，2番目としていずれも考慮しないクラス(22%)が認められることがわかった．さらに，上位2位のクラスと性別，年齢階層，感染症に対する意識，同居子供の有無との関連を考察することができた．

Title of Dissertation: EXAMINING DIFFERENTIAL ITEM FUNCTIONING FROM A LATENT CLASS PERSPECTIVE Karen Samuelsen, Doctor of Philosophy, 2005 Dissertation directed by: C. Mitchell Dayton Department of Measurement, Statistics and Evaluation Current approaches for studying differential item functioning (DIF) using manifest groups are problematic since these groups are treated as homogeneous in natur...

Over the past several years more significant books have been published on latent class (LC) and finite mixture models than any other class of statistical models. The recent increase in interest in LC models is due to the development of extended computer algorithms, which allow today's computers to perform latent class analysis on data containing more than just a few variables. In addition, rese...