Language-Mix Exposure and Youth Well-Being: A Multi-Group Structural Equation Model of Social Comparison and Fear of Missing Out Among Indonesian Adolescents

This dataset contains survey responses from 612 Indonesian youth aged 16–24 across four urban regions (Yogyakarta, Bandung, Denpasar-Badung, and Jakarta), including detailed measures of language-mix exposure on social media, perceived social capital, fear of missing out, and self-reported well-being, alongside sociodemographic and digital media use indicators. The data were collected as part of a multi-site study on how everyday multilingual social media environments relate to youth psychosocial adjustment.