Loneliness and Attitudes toward Aloneness in Belgian Adolescents: Measurement Invariance across Language,Age, and Gender Groups

In this study, the factor structure and psychometric properties of a French adaptation of the well-established Loneliness and Aloneness Scale for Children and Adolescents (LACA) was investigated in a French-speaking sample of Belgian adolescents (N?=?641; Mage?=?14.35, SD?=?2.03; 53.4% girls). In addition, measurement invariance analyses across the two main language groups in Belgium (i.e., Dutch-speaking and French-speaking) and across age and gender were conducted on a combined sample of French-speaking and Dutch-speaking Belgian adolescents (N?=?1282; Mage?=?14.36 years, SD?=?2.03; 53.6% female). Subsequently, group mean differences across language, age, and gender groups were investigated. Convincing support was found for the expected four-factor structure of the French adaptation of the LACA and the measure showed good reliability. Results further indicated that Belgian adolescents from the two principal language groups and from different age and gender groups interpreted the items of the LACA similarly. Therefore, analyses of group mean differences could be compared. Given the small effect sizes that accompanied the obtained effects, replication research is needed to further investigate these group mean differences.