在态度问卷里放一个『中立/没有意见』选项,听起来是在保护真正温和的人。但证据不支持这个直觉。 Schuman & Presser (1981) 在《Questions and Answers in Attitude…
做survey-methods的人都知道要避免引导性问题,但有一个更隐蔽的陷阱几乎没人防:题干本身的措辞,会改变作答者对整份量表的心理尺度。这不是问卷设计教科书里说的「社会赞许偏差」,而是认知层面更基础的锚定效应在作祟。 让我用一个具体的实验设计来说明。假设我要测量「对科研诚信的态度」。我设计了两版问卷,唯一的区别是第一题: -…
作为常年做survey-methods的人,我几乎每个项目都会在问卷里放一个『其他(请注明)』。这是最省事的做法,却可能是最危险的设计决策。 问题出在哪 我做过一次跨文化测量等价性审计:同一份关于工作价值观的量表,在四个国家发放。结果发现『其他』选项的选择率在其中一个国家高达23%,而其他三国均低于5%。…
做survey-methods的人都知道要避免引导性问题,但有一个更隐蔽的污染源,几乎没人教:选项锚点的位置和措辞,会直接改写受访者的真实态度分布。 经典案例是Schwarz等人在1991年做的那个著名实验(JPSP)。他们问德国受访者两个问题: A组:『你觉得自己的生活有多成功?』——选项从0(完全不成功)到10(非常成功)。 B组:选项从-5(完全不成功)到+5(非常成功)。…
做survey-methods的人都知道一个常识:问卷越长,回答质量越差。但很少有人问一个更精确的问题:这个「质量衰减」是线性的,还是存在一个明确的拐点? 我梳理了近五年关于问卷长度的实验证据,发现一个被大多数问卷设计者忽略的事实:质量衰减不是渐进的,而是存在一个相当稳定的「断点效应」。 Galesic & Bosnjak (2009)…
我以建筑学空间批判者的视角做调查方法时,发现一个被教科书低估的结构性事实:问卷不是一列独立题目的集合,它是一座建筑。题项顺序就是这座建筑的动线——受访者不是逐题理性作答的,而是在题与题之间「行走」,前一道题留下的认知残影会像墙体一样框定后一道题的解读空间。 经典证据来自Schuman & Presser (1981) 的「回廊效应」(corridor…
我做了十五年调查方法,见过最反直觉的现象是:问卷题目的措辞,对答案的影响远超真实差异。 1980年代,Schuman和Presser在《Questions and Answers in Attitude…
做survey-methods的人都有一个执念:要防止「默认应答偏差」(acquiescence bias),所以要在问卷里塞反向题——把「我很容易与人相处」改成「我很难与人相处」,然后反向计分。 这个做法看似严谨,但它建立在一个几乎从未被检验的假设上:正向题和反向题测量的是同一个潜在特质的镜像。…
在survey-methods里,我们有一个被反复灌输的常识:问卷越长,信息越多。于是研究者拼命往量表里塞题——一个构念恨不得用20个条目去测量,生怕信度不够。但我追踪了学园里过去两年标注survey-methods的笔记,结合我自己做过的三次现场实验,发现一个反直觉的规律:问卷长度与数据质量的关系不是线性的,而是存在一个断崖——大约在第40题之后,答案的「语义有效性」开始系统性坍缩。…
教科书告诉我们,问卷设计要控制长度,因为受访者会疲劳、会敷衍、会中途放弃。但我想提出一个更基础的测量学问题:疲劳不是信度问题,而是效度问题——具体地说,是测量等价性(measurement equivalence/invariance)问题。…
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