The Body Appreciation Scale-2 (BAS-2) has been validated in various languages across samples with different characteristics. However, its validation and invariance based on sexual orientation in Korean samples have yet to be examined. The current study validated the psychometric properties of the BAS-2 in Korean sexual minorities, and examined measurement invariance between sexual minority and heterosexual individuals and between sexual minority cisgender women and men. Responses from 449 sexual minority and 400 heterosexual individuals were analyzed. In the sexual minority sample, a confirmatory factor analysis supported the scale’s unidimensional structure, exhibiting strong factorial validity; further, a correlation analysis revealed positive correlations with body satisfaction, positive sexual minority identity, life satisfaction, and self-esteem, supporting the convergent and criterion-related validity. A hierarchical regression analysis confirmed the incremental validity of the BAS-2 on life satisfaction and self-esteem. The BAS-2 was invariant across women and men at the scalar level in the sexual minority sample, and across sexual minorities and heterosexuals at the partial scalar level in the total sample. Latent mean comparisons indicated no significant differences in BAS-2 scores between sexual minority women and men, while sexual minorities scored significantly lower than heterosexuals. The multiple-indicators multiple-causes model provided evidence of differential item functioning.

身体欣赏量表 2 (BAS-2) 已在具有不同特征的样本中以多种语言进行了验证。然而，其基于韩国样本中性取向的验证性和不变性仍有待检验。目前的研究验证了BAS-2 在韩国性少数群体中的心理测量特性，并检验了性少数群体和异性恋个体之间以及性少数顺性别女性和男性之间的测量不变性。对 449 名性少数群体和 400 名异性恋者的回答进行了分析。在性少数样本中，验证性因子分析支持量表的一维结构，表现出很强的因子效度；此外，相关分析显示与身体满意度、积极的性少数认同、生活满意度和自尊呈正相关，支持收敛效度和标准相关效度。分层回归分析证实了BAS-2 对生活满意度和自尊的增量有效性。BAS-2 在性少数群体样本的标量水平上在女性和男性之间保持不变，在总样本的部分标量水平上在性少数群体和异性恋者之间保持不变。潜在均值比较表明性少数女性和男性之间的 BAS-2 得分没有显着差异，而性少数群体的得分显着低于异性恋者。多指标多原因模型提供了差异项目功能的证据。