June 2026
- Jun 22, 2026ConceptsThe Spacing Effect: Why Cramming Fails and Spaced Practice WinsEbbinghaus found in the 1880s that spreading repetitions across days needed fewer total repetitions than massing them, so spacing is not just better, it is cheaper. The 2006 Cepeda and Pashler meta-analysis, pooling 254 studies and more than 14,000 participants, confirmed the advantage is large and gave a practical rule: set the gap between sessions at roughly 10 to 30 percent of how long you need to remember. Covers Bjork's desirable difficulties and the fluency illusion.
- Jun 5, 2026ConceptsLearning Science Evidence Map: What the Research Actually ShowsAn original measurement sits alongside the research ratings: of the usable top search results for learning styles, only 2 of 7 mentioned that the meshing hypothesis has repeatedly failed controlled tests, the lowest disclosure rate measured, while every result checked for highlighting and re-reading noted their low utility. Eight techniques rated on evidence strength and effect type, each tied to a named peer-reviewed source.
April 2026
- Apr 15, 2026IdeasThe Cognitive Costs of Multitasking RevealedWhat the research found and why the feeling of productivity misleads. Ophir, Nass and Wagner expected heavy media multitaskers to have developed switching skills, and found instead that they filtered irrelevant information worse, performed worse on working memory, and were slower and more error-prone at task switching itself. Leroy's attention residue work shows brief interruptions cost far more than the time they occupy.
- Apr 14, 2026ConceptsFeynman Technique: Accelerate Learning with EvidenceWhat the four steps are and why the method works alone. Nestojko and colleagues found in 2014 that undergraduates told they would teach a passage outperformed those told they would be tested on it, on both recall and conceptual questions, although neither group taught anyone. The preparation frame produces the gain, which is why explaining a concept in plain language to no one still exposes the gaps.
March 2026
February 2026
- Feb 28, 2026ConceptsLearning Science Terms Explained ClearlyLoose vocabulary produces bad study habits: "reduce cognitive load" should mean cutting extraneous load, not the germane load that is the learning. This glossary draws the lines that matter, between fluency and real recall, blocked and interleaved practice, near and far transfer, activity and genuine engagement. Karpicke and Blunt (2011) found self-testers outlearned students who built concept maps and rated the maps as better.
- Feb 13, 2026ConceptsHow Learning Actually Works According to ScienceRoediger and Karpicke's 2006 experiment split students between re-reading and self-testing. On a five-minute test the re-readers won, which is why students keep re-reading, but a week later the retrieval group held about 61% against roughly 40% for those who read the passage four times. The article traces why highlighting, cramming and learning-style matching fail, and what Dunlosky's 2013 review rated as high utility.
- Feb 12, 2026ConceptsHow Memory Retention Really WorksRetention depends on three stages, and each has its own failure mode: shallow encoding, interrupted consolidation, or a memory stored but unreachable. Craik and Lockhart's levels-of-processing work explains why meaning-based encoding outlasts surface detail, and Bjork's storage-versus-retrieval-strength account explains why reviewing before you have partly forgotten adds little. Loftus implanted false memories in roughly a quarter to a third of participants.
- Feb 11, 2026ConceptsLearning Myths That Refuse to DieSeven persistent myths taken apart against the research, from learning styles and left brain versus right brain to multitasking, cramming, and brain training games. Howard-Jones's survey synthesis across five countries found belief in learning styles ranging from 93 percent in the UK to 97 percent in Turkey and China, and the rates were no lower among teachers with more science training. What replaces the myths: retrieval practice, spacing, elaboration, and interleaving.
- Feb 3, 2026ConceptsCognitive Principles That Shape DecisionsEight constraints that govern how people actually decide, from Simon's bounded rationality and Cowan's revision of working memory capacity down to roughly four items, through cognitive load, attention scarcity, and dual process theory. Johnson and Goldstein's study in Science shows what follows: opt-out countries reached organ donation rates of 85 to 99 percent while opt-in countries managed 4 to 28 percent, with broadly similar populations and attitudes.
January 2026
- Jan 28, 2026ConceptsHeuristics ExplainedAvailability, representativeness, anchoring, affect and recognition each work well in the environments they fit and fail predictably outside them. The article sets Kahneman and Tversky's biases research against Gigerenzer's ecological rationality case, and reports that Dhami and Ayton found British magistrates deciding bail on roughly two pieces of information matched a logistic regression model using 14 variables.
- Jan 27, 2026ConceptsHow the Mind Actually WorksThe mind is a set of specialized systems rather than one general processor: fast automatic processing, a slow deliberate system that often just endorses the first answer, reconstructive memory, and an attentional bottleneck. Nelson Cowan's 2001 review concluded true working memory capacity is about four chunks, not Miller's seven, once rehearsal and chunking are controlled for.
- Jan 13, 2026TechnologyAI vs. Human Intelligence ComparedGulshan and colleagues reported in JAMA in 2016 that an algorithm trained on 128,175 retinal photographs detected diabetic retinopathy at 97.5 percent sensitivity and 93.4 percent specificity, above the average of eight ophthalmologists. Set against that: ARC, the benchmark built to test flexible rule induction, where adults average about 85 percent and the best 2024 systems scored roughly 34 percent. A capability-by-capability comparison, plus what human-AI teams add.
October 2025
May 2025
April 2025
March 2025
- Mar 27, 2025ConceptsWhat Is Metacognition? Thinking About Your Own ThinkingJohn Flavell named metacognition in 1976 after noticing that ten-year-olds tested themselves before claiming a word list was learned while six-year-olds declared victory at once. The gap between feeling and fact is measurable: Kruger and Dunning found subjects scoring in the bottom quartile placed themselves near the 60th to 70th percentile. Cepeda and colleagues' 2006 synthesis of 317 experiments found consistent advantages for spacing study out rather than massing it.
- Mar 25, 2025ExplainersCognitive Science: Understanding Mind and IntelligenceWithin weeks of each other in September 1956, Newell and Simon demonstrated a program that proved theorems and George Miller argued that working memory holds roughly seven items, plus or minus two. The cognitive revolution had begun. Miller's number has since been revised downward: Cowan's 2001 reanalysis put the core limit near four chunks, the larger figure having conflated chunking with raw capacity. Also inside: the Chinese Room and Marr's three levels.
February 2025
- Feb 3, 2025ConceptsExploring Embodied Cognition: Mind-Body Connection InsightsStrack, Martin and Stepper had participants hold a pen between the teeth, forcing smile muscles, or between the lips, preventing them, while rating Far Side cartoons. The forced-smile group found them significantly funnier, with nobody told why. Williams and Bargh later had people hold hot or iced coffee before rating a stranger: the warm cup produced warmer judgments. James had argued in 1884 we feel afraid because we run. The body is part of the mind, not its vehicle.
- Feb 2, 2025ConceptsDual Process Theory: Understanding Human Judgment SystemsShane Frederick's Cognitive Reflection Test, published in 2005, put the bat-and-ball problem to roughly 3,400 students at elite American universities including Harvard, MIT and Princeton: more than half answered 10 cents instead of 5. In Tversky and Kahneman's Linda problem, 85% of participants ranked a conjunction as more probable than one of its own parts. The article also covers the critiques, including Evans's own admission that System 2 is not clean either.
August 2024
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June 2024
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January 2024
- Jan 28, 2024ConceptsWhat Is Linguistics? Understanding Language ScienceSaffran, Aslin and Newport ran a stream with no pauses or stress cues, and the infants tracked which syllables reliably followed which, extracting word-like units from statistics alone. The page sets that against Chomsky's poverty of the stimulus argument rather than treating either as settled, and reports that Whorf's specific Hopi claim about time did not survive Malotki's detailed analysis of the language.
- Jan 14, 2024ConceptsA Comprehensive Guide to Understanding EmotionsShe failed to recognize fearful faces and kept no normal personal distance, yet still felt fear when inhaling carbon dioxide, which suggests the amygdala handles external threat signals rather than generating the feeling itself. The page sets the main accounts against each other, from James locating emotion in bodily feedback to Barrett building it from interoception plus concepts, and reports that free-response testing lowered cross-cultural agreement.
- Jan 7, 2024ConceptsImproving Memory: Effective Evidence-Based TechniquesSame material, same time, and the group that struggled to recall it did better. That is why the effective methods feel worse than the comfortable ones, and why rereading and highlighting rate low utility in Dunlosky's review despite being the most common strategies. The page also covers the memory palace trial that moved untrained volunteers toward competition-level recall while brain-training controls did not improve.
December 2023
- Dec 24, 2023ConceptsAre Attention Spans Shrinking? Debunking the MythWhat the famous statistic is actually worth. A 2015 Microsoft Canada consumer-insights document, not a peer-reviewed study, reported a fall from twelve seconds in 2000 to eight, and the BBC's Simon Maybin traced it in 2017 and found the twelve-second baseline had no identifiable scientific origin either. The goldfish figure was invented. Something real is changing in task-switching, but not what the number says.
- Dec 17, 2023ConceptsWhy Reading Makes You Smarter: Insights from NeuroscienceMaryanne Wolf had studied how children learn to read for twenty years when she tried to read a Hesse novel straight through and could not. Her attention slid off the page; she reread paragraphs without absorbing them. Years of scanning papers and email had made sustained engagement effortful. Reading is not natural like language: the brain has no reading circuit at birth and builds one through practice.
November 2023
August 2023
December 2022
September 2022
- Sep 23, 2022Work SkillsAttention Residue: Understanding the Cost of Task SwitchingSophie Leroy named it in 2009 and found that completing a task, or planning when you will finish it, reduces the residue, which makes closure the lever rather than willpower. The page also corrects a figure often quoted wrong: the 23 minutes is the average time before returning to the original context, counting every intermediate task, not the time lost to one interruption. Attention on a single screen fell from 2.5 minutes in 2004 to 47 seconds by 2020.
- Sep 2, 2022ConceptsRetroactive Interference and Memory Disruption DefinedMuller and Pilzecker concluded memories need undisturbed time to consolidate, which made theirs the first account of why sleep helps memory and why cramming one set of material straight into another produces worse retention. McGeoch later established the similarity gradient, so Spanish after French interferes far more than chemistry after French, because overlapping associations compete and the most recently strengthened ones win.
August 2022
July 2022
April 2022
September 2021
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