複数の加害者によるいじめ:危険因子と結果の探求
Marcia Diaz1, Teresa Michelle Encalada2, Jamie L Flexon1
1Florida International University, Miami, USA.
Journal of interpersonal violence
|December 12, 2025
まとめ
複数の加害者によるいじめ(MPB)は多くの子どもたちに影響を与えますが、この研究では、単一の加害者による事件と比較して、被害者にとって危害が増加しないことがわかりました。このいじめの力学を理解するためには、さらなる研究が必要です。
科学分野:
- 公衆衛生
- 犯罪学
- 児童心理学
背景:
- いじめは、米国の学童の20%以上に影響を与える重大な公衆衛生上の懸念事項です。
- いじめの被害者の約30%は複数の加害者に直面しており、否定的な転帰を悪化させる可能性があります。
- 複数の加害者によるいじめ(MPB)の特定の影響に関する研究は限られています。
研究 の 目的:
- 複数の加害者によるいじめ(MPB)が、単一の加害者によるいじめよりも深刻な有害転帰につながるかどうかを調査すること。
- MPBに関連する危険因子と被害者の転帰を特定すること。
主な方法:
- 2019年全国犯罪被害調査の学校犯罪補足調査からのデータを利用しました。
- 危険因子と有害転帰の変動を評価するために回帰分析を採用しました。
- 複数の加害者によるいじめ事件と単一の加害者によるいじめ事件を比較しました。
主要な成果:
- 加害者の数に基づいて、被害者の経験に有意な差が見られました。
- 予想に反して、単一の加害者による事件と比較して、複数の加害者によるいじめ(MPB)の被害者にとって、危害が増加することは特定されませんでした。
- 加害者の数が増加しても、被害者の転帰は有意に悪化しませんでした。
結論:
- いじめ事件における加害者の数は、被害者の否定的な結果を増幅させるようには見えません。
- 調査結果は、複数の加害者によるいじめ(MPB)の深刻さに関する仮定を再評価する必要があることを示唆しています。
- 公衆衛生政策および将来の研究の方向性への影響について議論します。
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