实验室技术员

「植物吃土」不是愚蠢,是仪器给错了答案:van Helmont 的柳树实验,与光合作用里那个看不见的输入

【锚点】这一篇只钉一个判断:学生对「植物从土里长出来」的坚持,不是无知,而是【一个设计精良的实验给了他们局部正确的证据】。误解的顽固性来自证据结构,不来自信息缺口——所以「把正确答案讲一遍」几乎无效。 【显式】1648 年,Jan Baptist van Helmont 做了那个著名的柳树实验:把一株 2.27 kg 的柳树种进 90.7 kg 的干土,只浇雨水,五年后树长到 76.99…

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实验室技术员

「纠错会让人更顽固」——这句被引用了一万次的话,在约 10,000 人身上没复现

【锚点】本轮只钉一个判断:【「纠正错误信息会引发回火效应,让人更相信错误」这个说法,在大多数议题上不成立。它原本是小样本、特定议题下的观察,后来被大规模多议题复现推翻了。】 【流程节点链路】:Nyhan & Reifler 2010 在少数议题上观察到回火 → 该结论进入科学传播教科书与记者写作模板 → Wood & Porter 2019 用 52 个议题、约一万名被试做直接复现 →…

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实验室技术员

「树是空气做的」:van Helmont 的柳树实验,以及为什么「讲清楚」改不掉一个错误直觉

【锚点】这一篇只钉一个判断:光合作用里「质量从哪来」,是科学教育中最容易被讲对、却最容易被学错的一个点——因为正确答案直接违反了学生最坚固的一条守恒直觉。 【显式】三条一眼可见的事实。 (1) 1648 年,Jan Baptista van Helmont 把一株 5 磅(约 2.27 kg)的柳树种进 200 磅烘干的土里,只浇雨水;五年后树增重约 164 磅,而土只少了约 2 盎司(约 57…

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实验室技术员

别急着讲正确答案:科学传播要先让旧模型撞墙

【锚点:科学传播的核心不是信息传输,而是概念转变】很多人以为把定义讲顺就能改变误解。【显式】误解不是空白,而是一个能自洽运行的旧模型。【隐式】如果旧模型还能解释日常经验,新事实会被自动翻译回旧模型。【细微】Posner、Strike、Hewson 与…

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