Inclusion of Other in the Self(IOS)尺度(Aron ら, 1992)にもとづきます。図は、オンラインで公開された2つの図(Gächter ら, 2015/Baader ら, 2024)から円の重なりの割合を測って平均し、描き直したもの、説明文は本サイトの運営者が日本語に訳したもので、公式の日本語版ではありません。
Aron A, Aron EN, Smollan D. Inclusion of Other in the Self Scale and the structure of interpersonal closeness. J Pers Soc Psychol. 1992;63(4):596-612. doi:10.1037/0022-3514.63.4.596
Fletcher GJO, Simpson JA, Thomas G. The measurement of perceived relationship quality components: a confirmatory factor analytic approach. Pers Soc Psychol Bull. 2000;26(3):340-354. doi:10.1177/0146167200265007
Kowal M, et al. A cross-cultural psychometric evaluation of the 3-item Relationship Satisfaction Scale across 37 languages. J Marriage Fam. 2026. doi:10.1111/jomf.70110
Gächter S, Starmer C, Tufano F. Measuring the closeness of relationships: a comprehensive evaluation of the 'Inclusion of the Other in the Self' scale. PLoS One. 2015;10(6):e0129478.
Baader M, Starmer C, Tufano F, Gächter S. Introducing IOS11 as an extended interactive version of the 'Inclusion of Other in the Self' scale to estimate relationship closeness. Sci Rep. 2024;14(1):8901. doi:10.1038/s41598-024-58042-6
Joel S, Eastwick PW, Allison CJ, et al. Machine learning uncovers the most robust self-report predictors of relationship quality across 43 longitudinal couples studies. Proc Natl Acad Sci U S A. 2020;117(32):19061-19071. doi:10.1073/pnas.1917036117