Research-backed, actionable articles on AI at work, endurance training and how people learn. Every claim has a source.
Three meta-analyses and a 231-student experiment on video playback speed. Comprehension holds to 1.5x, transfer degrades most, and the saved time only pays if you spend it.
Read the article →Short recall tests placed between lecture segments cut mind wandering from 39% to 19% and rescued the final stretch. Six studies and a protocol for trainers.
Read the article →Prompted self-explanation averages g = 0.55 across 64 reports and g = 0.46 in digital settings, and zero on plain facts. The distinction, and a protocol.
Read the article →Nine practice problems scored no better than three after 4 weeks, while the same reps split across two sessions doubled retention. A stopping rule with numbers.
Read the article →A 10% faster step rate cuts peak patellofemoral force by 14% in the lab. The nine studies that bound the effect, the cost in speed, and a 6-week plan.
Read the article →Two preregistered replications flattened the famous pen-versus-keyboard effect. A 2024 meta-analysis of 24 studies found a smaller one that hinges on review.
Read the article →Creatine kinase rose 340% after a first downhill run and 63% after the second. Eight studies on eccentric preconditioning, the dose, and the timing.
Read the article →Preparing to teach lifts recall on its own. The gain survives a week only when the explanation comes from memory. Four experiments, two meta-analyses, one protocol.
Read the article →Crossover trials, from 121 adults to 426 anatomy students, find no gain from matching instruction to a learner's style. The evidence, and the protocol I run instead.
Read the article →Across 607 effect sizes, more than a third of feedback interventions lowered the performance they targeted. Nine studies, and the routine I use at the table.
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