小標本サイズにおける潜在変数媒介モデルのパワープライアに関する研究
Lihan Chen1, Milica Miočević1, Carl F Falk1
1Department of Psychology, McGill University, Montreal, Qubec, Canada.
The British journal of mathematical and statistical psychology
|December 24, 2025
まとめ
情報プライアは、小標本における潜在変数モデルのベイズ分析を改善する。マハラノビス重み(MW)プライアは収束を改善したが、非交換性下では弱情報プライアとは異なり、性能が悪かった。
科学分野:
- 統計学
- 心理測定学
- 生物統計学
背景:
- 潜在変数モデルは、信頼性の高い結果を得るためにしばしば大規模な標本サイズを必要とする。
- 小標本におけるベイズ分析は、特に過去のデータを使用したパワープライアは、情報プライアから利益を得る。
- 既存のパワープライア法は、潜在変数モデルに常に適しているわけではない。
研究 の 目的:
- 2つの適応パワープライア法を潜在変数モデルに適用することを目的とする:マハラノビス重み(MW)と単変量プライア。
- 小標本シナリオにおける拡散プライアと弱情報プライアに対する性能を比較することを目的とする。
- 間接効果推定における収束性、バイアス、効率、および信頼区間カバレッジを評価することを目的とする。
主な方法:
- MWおよび単変量パワープライアを、拡散プライアおよび弱情報プライアと共に適用した。
- 潜在変数媒介モデルを使用した。
- 様々な標本サイズと非交換性の程度をシミュレートした。
主要な成果:
- 拡散プライアと単変量プライアは収束不良をもたらした。
- 弱情報プライアとMWプライアは収束を改善し、妥当な推定値を提供した。
- MWプライアは、特定の非交換性条件下で最適以下の性能を示した。
結論:
- 弱情報プライアは、小標本における潜在変数モデルに対して信頼性の高いアプローチを提供する。
- MWプライアは有望であるが、非交換性データに対してはさらなる改良が必要である。
- 今後の研究では、潜在変数分析における現在のパワープライア法の限界に対処する必要がある。
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