10.34934/DVN/7SZGXQ The Social Study, TSS Social Sciences and Digital Humanities Archive – SODHA 2026 The Social Study (TSS) administers a yearly Core Study Questionnaire (CSQ) that captures essential socio-demographic, behavioral, and attitudinal information of panelists. These data are made freely available to the scientific community following an open science policy. Containing over 150 questions, the CSQ 2025 was administered in three consecutive waves in the first half of 2025. CSQ 2025 repeats items from CSQ 2024 that require annual updates and introduced new questions on panelists' extended family, sports and transports. The Social Study, TSSThe Social Study