Pedagogy Reading Research And Zombie Ideas

---
name: pedagogy-reading-research-and-zombie-ideas
description: "Use when judging an education claim, a study or a piece of training: how to read education research critically including effect sizes, meta-analysis limits and why headline rankings mislead, the zombie ideas that keep returning — learning styles, the learning pyramid, digital natives, brain-based learning — and what teacher expertise actually consists of and how it develops."
---

# Pedagogy and Learning Science: Reading Education Research, Zombie Ideas, and Teacher Expertise

> **Part 4 of 5** of the *Pedagogy and the Study of Learning and Teaching* reference (plugin `pedagogy-and-the-study-of-learning`), covering §22–§24. Sibling skills: `pedagogy-reliability-memory-cognitive-load-and-robust-effects` (§0–§7), `pedagogy-explicit-instruction-worked-examples-and-feedback` (§8–§13), `pedagogy-subject-instruction-curriculum-and-classroom-practice` (§14–§21), `pedagogy-reference` (§25–§30). Section numbers are shared across the set; a reference written as §N → `skill` points into that sibling skill.
>
> **Currency:** The cognitive science is stable and well-replicated. Two areas moved. See §25 → `pedagogy-reference` for AI in education, and post-pandemic achievement data.

> **⚠️ This field has an unusually wide gap between what is well-established and what is
> widely believed and practised.** ⚠️ **Some findings here are among the most robust in
> all of psychology; others in the same textbooks failed replication entirely; and a third
> group were never research findings at all — they were marketed.**
>
> **Complements a psychology reference (§1's replication context) and a family/community
> reference (behaviour genetics, which constrains how much any intervention can do).**
>
> **⚠️ GOTCHA** boxes mark widely-taught ideas that the evidence contradicts.
>
> **⚠️ A disclosure about the political layer:** ⚠️ **education research is unusually
> ideologically loaded, because it touches how children are raised and how resources are
> allocated.** **⚠️ Where a genuine scholarly dispute exists (§8 → `pedagogy-explicit-instruction-worked-examples-and-feedback`, §14 → `pedagogy-subject-instruction-curriculum-and-classroom-practice`) I set out both
> positions; where the evidence is one-sided I say so and show the evidence.**
>
> **The three ideas that organize this document:**
> 1. **⚠️ Learning is a change in LONG-TERM MEMORY; performance during a lesson is not
>    learning** (§2 → `pedagogy-reliability-memory-cognitive-load-and-robust-effects`, §7 → `pedagogy-reliability-memory-cognitive-load-and-robust-effects`). **The two come apart routinely, and confusing them is the single
>    most consequential error in teaching.**
> 2. **⚠️ Working memory is tiny and prior knowledge is the great multiplier** (§2 → `pedagogy-reliability-memory-cognitive-load-and-robust-effects`, §3 → `pedagogy-reliability-memory-cognitive-load-and-robust-effects`).
>    **Almost every instructional design principle that works is managing that limit.**
> 3. **⚠️ Things that FEEL like good learning usually aren't** (§4 → `pedagogy-reliability-memory-cognitive-load-and-robust-effects`, §7 → `pedagogy-reliability-memory-cognitive-load-and-robust-effects`). **Fluency,
>    familiarity and ease are systematically misleading — for students AND teachers.**

---

## §22. ⚠️ Reading Education Research

> **⚠️ The skill that protects you from most of §23.**
```
⚠️ EFFECT SIZES  ⚠️ Cohen's benchmarks (0.2/0.5/0.8) were never meant
   for education. ⚠️ In education, ~0.1 is meaningful, 0.4 is large
   for a well-run trial, ⚠️ and anything above 1.0 in a real school
   trial should provoke suspicion, not excitement
⚠️ WHAT INFLATES EFFECT SIZES
   ⚠️ Researcher-made outcome measures aligned to the intervention
   ⚠️ Short duration and immediate post-tests
   ⚠️ Small samples · ⚠️ narrow-range populations
   ⚠️ Developer-delivered implementation
   ⚠️ Publication bias
⚠️ THE HATTIE CAUTION  ⚠️ Visible Learning's league table of effect
   sizes is enormously influential and has been substantively
   criticized — for averaging incommensurable meta-analyses
   ("meta-meta-analysis"), for statistical errors identified by
   several reviewers, and for the CLE metric. ⚠️ Use it to generate
   hypotheses, NOT to rank interventions
⚠️ QUESTIONS TO ASK
   Compared to WHAT? · Measured HOW? · For WHOM? · For HOW LONG? ·
   ⚠️ WHO delivered it? · ⚠️ WHO funded it? · ⚠️ Has an INDEPENDENT
   team replicated it at scale?
```
**⚠️ Better sources than a single study**: ⚠️ **the EEF Toolkit, the What Works
Clearinghouse, Campbell and Cochrane reviews** — **and note that even these disagree,
partly because they apply different inclusion standards.**

---

## §23. ⚠️ Zombie Ideas

```
⚠️ LEARNING STYLES  ⚠️ The meshing hypothesis — that matching
   instruction to a preferred style improves learning — has been
   tested repeatedly and FAILS. ⚠️ People have preferences; matching
   them does not help. ⚠️ Still believed by large majorities of
   teachers in survey after survey
⚠️ THE LEARNING PYRAMID / "cone of experience" percentages
   ⚠️ Fabricated. The numbers have no traceable empirical source
⚠️ "WE ONLY USE 10% OF OUR BRAINS"  ⚠️ False
⚠️ LEFT-BRAIN / RIGHT-BRAIN learners  ⚠️ Not how lateralization works
⚠️ MULTIPLE INTELLIGENCES  ⚠️ Gardner's theory is not an empirically
   validated model of ability, and ⚠️ Gardner himself has objected to
   its conflation with learning styles
⚠️ BRAIN GYM  ⚠️ No credible basis
⚠️ DIGITAL NATIVES  ⚠️ Young people are not innately skilled with
   technology; the research does not support a generational cognitive shift
⚠️ "TEACH SKILLS, NOT CONTENT" / content-free critical thinking
   ⚠️ Contradicted by §5 — critical thinking is largely domain-specific
⚠️ 70-20-10  ⚠️ No empirical origin (§20)
⚠️ "GOOGLE IT — memorization is obsolete"  ⚠️ Contradicted by §2 and
   §5: you cannot think with information you must look up
```
**⚠️ The diagnostic that catches most of them**: ⚠️ **does the claim have a citable primary
study, or only a diagram and a percentage?** **⚠️ And does it flatter the listener?**

---

## §24. Teacher Expertise

**⚠️ Teacher quality varies substantially and matters** — ⚠️ **but observable credentials
predict it poorly, which is why the policy problem is hard.**
**⚠️ PCK (pedagogical content knowledge)**: ⚠️ **knowing the content is necessary and not
sufficient; the distinctive expertise is knowing how learners typically misunderstand THIS
topic and what representations work** (§10 → `pedagogy-explicit-instruction-worked-examples-and-feedback`).
**⚠️ Development**: ⚠️ **one-off professional development has poor evidence; sustained,
content-specific, coached programmes with follow-up do better.** **⚠️ Instructional
coaching has among the better evidence bases in teacher development, and its constraint —
like tutoring (§18 → `pedagogy-subject-instruction-curriculum-and-classroom-practice`) — is cost.**
**⚠️ The expert blind spot** (§10 → `pedagogy-explicit-instruction-worked-examples-and-feedback`) ⚠️ **means experienced teachers can lose access to what
novices find hard**, **which is why student misconception data is so valuable.**