From Birthday Cheers to Privacy Fears: Unravelling the Paradox of Social Media Celebrations in Nigeria

Supplementary appendix for the PST 2025 conference paper “From Birthday Cheers to Privacy Fears: Unravelling the Paradox of Social Media Celebrations in Nigeria.” The file (PDF, 3 pages) contains: • complete measurement scales used in the PLS-SEM model (Social Gratification, Social Media Usage, Disclosure, Knowledge) • item loadings, Cronbach’s α, composite reliability, AVE • HTMT ratios and measurement-invariance (compositional, mean, variance) permutation tests • mapping of adapted gratification items to original source items These materials support the results reported in Sections 3–5 of the main paper.PST 2025会议论文《从生日祝福到隐私焦虑：剖析尼日利亚社交媒体庆祝活动的悖论》补充附录。 本文件（PDF格式，共3页）包含以下内容： • 偏最小二乘结构方程模型（PLS-SEM, Partial Least Squares Structural Equation Modeling）所使用的完整测量量表，涵盖社会满足感（Social Gratification）、社交媒体使用（Social Media Usage）、信息披露（Disclosure）及知识（Knowledge）四个维度 • 题项载荷、克朗巴哈α系数（Cronbach’s α）、组合信度与平均变异抽取量（AVE, Average Variance Extracted） • HTMT比率（HTMT, Heterotrait-Monotrait Ratio）以及测量不变性（包括成分不变性、均值不变性与方差不变性）的置换检验 • 经过改编的满足感题项与原始来源题项的对应映射表 本补充材料用于支撑主论文第3至第5节中报告的研究结果。