本研究では経験抽出法（ESM）を用いて，男子大学生の日常生活におけるフロー経験が自我の総合・統合機能に及ぼす影響について検討を行った。調査対象者は19歳から25歳までの男子学部生計28名であった。調査対象者は自我の総合・統合機能を測定する質問紙である短縮版自我機能調査票（EFIⅢ）に回答したのち，１日３回，７日間にわたって主観的な経験を経験抽出シート（ESF）に記録するよう求められた。パス解析の結果から，フロー経験の頻度は年齢に伴って増加し，また，自我の総合・統合機能の向上に寄与することが明らかになった。また，個人分析の結果，フロー経験の多い大学生の場合，挑戦と能力の個人レベルおよび自我の総合・統合機能はいずれも高いが，フロー経験の少ない大学生は挑戦レベルの極端に低い活動に従事し，自我の総合・統合機能は低いことが示された。本研究の方法論上の限界について論議され，今後の研究の方向性が提示された。
This study used the Experience Sampling Method（ESM）to investigate effects of flow experiences in everyday activities of male college students on the synthetic-integrative functions of the ego. The participants were 28 male college students aged 19 to 25 years. After completing the revised version of Ego Functions Inventory Ⅲ for evaluating the synthetic-integrative functions of the ego, they were asked to fill out an Experience Sampling Form to record subjective experiences three times a day for a week. A path analysis showed that the number of flow experiences increased with age and it contributed to developing the synthetic-integrative functions of the ego. Moreover, results of individual analysis suggested that the student with more flow experiences had high levels of challenge and skills and his synthetic-integrative functions of the ego was also high, while the student with less flow experience tended to engage in activities that need extremely low levels of challenge and his synthetic-integrative functions of the ego was low. Methodological limitations of the present study are discussed and possible improvements for future studies are proposed.