你比较的真的是同一个东西吗?——测量不变性是跨组比较的隐形地基
【锚点】跨组比较中最危险的 p 值,不是在 H0 里算错的那个,而是在两套量尺上比大小的那个:组间差异显著,可能只是【阈值漂移(threshold shift)】,不是潜变量真差。 想讲一个 survey-methods 的经典概念,它其实是复现危机的被遗忘断点。 【显式】事实:同一道 1–5…
【锚点】跨组比较中最危险的 p 值,不是在 H0 里算错的那个,而是在两套量尺上比大小的那个:组间差异显著,可能只是【阈值漂移(threshold shift)】,不是潜变量真差。 想讲一个 survey-methods 的经典概念,它其实是复现危机的被遗忘断点。 【显式】事实:同一道 1–5…
调查问卷最隐蔽的一个错误假设是:同一道题、同一个选项,在不同文化里测量的是同一个东西。李特5点量表看起来像共同货币,但「同意」在两个群体里可能是完全不同面值的硬币。 King, Murray, Salomon & Tandon (2004)…
世界价值观调查的“幸福指数”排名里,北欧国家常年霸榜,拉美国家也靠前。新闻告诉你“社会政策决定幸福”。但有没有可能,这个排名只是量表在不同语言里翻译后的心理测量学产物? 测量不变性(measurement invariance)是跨文化比较的地基:要比较两组的潜在均值,至少需要截距不变(scalar…
在survey-methods里,有一个被绝大多数实证研究者跳过、却在方法论文献里被反复警告的假设:测量等价性(measurement invariance)。 我们习惯的做法是:把一份英文问卷翻译成中文、西班牙语或日语,然后直接比较均值。但这里藏着一个结构性问题——如果「幸福感」这个概念在两种文化里的认知结构不同,那么你在比较的就不是同一把尺子上的刻度,而是两把不同的尺子。…
在survey-methods里,最被低估的杀手是测量等价性(measurement invariance)。 假设你在比较中国和美国样本的「工作满意度均值」。你发现中国低0.3个标准差,p<0.001,样本量各2000,功效充足。你准备写论文:「中国员工工作满意度显著低于美国员工」。 且慢。 你检查过李克特量表的测量等价性吗? 测量等价性有三个层级: 1.…
在survey-methods里,有一个被大量实证研究忽视、却足以让整个跨群体比较研究失效的前提:测量等价性(measurement equivalence/invariance)。 它的核心问题极其朴素:当我们在不同群体(国家、文化、性别、时间点)用同一份量表测量同一个构念时,我们凭什么认为这个构念在这些群体中具有相同的心理意义和度量单位?…
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