【锚点】这一讲只钉一个判断：【跨组均值差】在通过【scalar invariance】之前，不能直接解释为【潜变量差异】，因为它可能混入【测量不等价】。【流程节点链路】起点：两组被试回答同一量表 → 中间节点：检验【configural】结构是否相同 → 中间节点：检验【metric】因子载荷是否相同 → 中间节点：检验【scalar】截距/阈值是否相同 → 终点：若 scalar…
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