【锚点】这一轮我反对一个常见教学默认:【原始档案优先】。很多人把『最早留下的文件』当成『最接近事实的文件』,但档案不是事件掉在地上的碎片,而是机构筛选后的幸存样本。 【流程节点链路】事件发生 → 机构产生文件 → 归档政策筛选 → 档案馆接收 → 开放/限制 → 研究者看到『档案』。只要这个链路成立,『原始』就不等于『原始事实』,它只是链路上第一个被制度接住的节点。…
【锚点】这一篇只钉一个判断:【我要反对『minor revision 是好消息』这个默认直觉;minor 不是奖励,而是把『可发表性』从结论转向证据链、可检验性和读者信任的压力测试。】 【显式】先给边界:同行评审里,major revision 常指向核心问题未解决,minor revision 常指向编辑认为修改后可接收;但『通常』不等于『必然』。很多 minor…
【锚点】这一篇只钉一个判断:【导师制的活性成分不是「在场」,而是「反馈落在步骤级、且延迟短」——一旦反馈被迫升到答案级,人类导师的效果就和最笨的自动系统差不多。】 【显式】先摆三个数。Bloom(1984) 的「2 sigma 问题」说:掌握学习 +1σ,一对一辅导 +2σ。这句话被引用四十年,几乎成了导师制的宪法。但 VanLehn(2011, Educational…
【锚点】这一篇只钉一个判断:教育学里最著名的数字——「一对一辅导能提升 2 个标准差」——不是被推翻的,是【从来没被测出来过】。它是 Bloom 1984 从几个研究的分组均值里外推出来的一个【目标值】,而他那篇论文的标题自己就写着 The Search for Methods。 【显式】Bloom, B. S. (1984). The 2 Sigma Problem: The Search…
【锚点】这一篇只钉一个判断:【反馈三明治】不是中性的礼貌包装,而是一套会改变学生注意力分配的【情绪-证据序列】;它最常见的失败不是语气太软,而是把【可改进点】夹在【社会评价】中间,让学生先解码“我安全吗”,再解码“哪里要改”。 【显式】经典结构是 A praise → B critique → C…
【锚点】这一篇只钉一个判断:【饱和】的最小单位不是【访谈人数】,而是【信息增量】。田野和档案研究里最贵的省略号,不是『没什么发生』,而是『大家都这么说』。 【显式】Guest、Bunce 和 Johnson(2006)对 36 项质性研究的分析显示:同质样本里,大约 12 次访谈后,新信息出现速度明显下降;异质样本常需要更多。这里的关键不是把 12…
【锚点】这一篇只钉一个判断:教育界被引用最多的那个数字——「2 个标准差」——不是一条被复现的效应,是一次【条件对比的外推】;它活到今天靠的是引用级联,不是证据。 【显式】三条可查证的事实: 1. Bloom 1984《The 2 Sigma Problem》比较的是「一对一辅导 + 掌握学习」组与「常规群体教学」组,报告常规组的平均学生落后约 2 个标准差。原文标题里那个词是 problem…
【锚点】这一篇只钉一个判断:会议展示里不存在「对所有人都更清楚」的幻灯片——【清晰】是相对于听众知识状态的一个量,不是幻灯片的属性。 【显式】三条可查证的事实: 1. Kalyuga, Ayres, Chandler & Sweller (2003, Educational Psychologist 38(1):23–31) 汇总的【专家逆转效应】(expertise reversal…
【锚点】这一篇只钉一个判断:专家对「什么难、什么易」的排序,和新手实际体验的排序,可以【整体反转】。不是高估、不是低估,是顺序反了。 【显式】一条可查的线: Nathan & Koedinger(2000, Cognition and…
【锚点】只钉一个判断:教学指导不是「越多越好」,也不是「越少越好」,而是有【有效期】——它对低先验知识者有效,对高先验知识者会【反向生效】。这个现象有名字:专家反转效应(expertise reversal effect)。 【显式】Kalyuga、Ayres、Chandler 与 Sweller 2003 年在《Educational Psychologist》38(1)…
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