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MDJLABS / SCIENTIFIC PROOF

What the
science says

SOURCED FACTSNOT MARKETING

FIG. 04 — FORGETTING CURVE · RETENTION (%) / TIME

1885FOUNDING ACT · MEASURED BY HAND

WITH SPACED REPETITIONWITHOUT RECALL — EBBINGHAUS

HERMANN EBBINGHAUSHe measured forgetting first — on himself. The curve takes shape before him.

Ebbinghaus, 1885 — model replicated by Murre & Dros, PLOS ONE, 2015. Spaced repetition brings each notion back just before it fades.

CH. 02 · THE NUMBERS4 BEATS · THE LOSS, THEN THE REBOUND

01 · 1 HR LATER~50 %

is lost within the hourthat follows a training session, if it isn’t recalled.

Ebbinghaus · replication Murre & Dros, 2015 · 1 HR
02 · AFTER 2 YRS55–75 %

attrition of unpracticed knowledge after 2 years.

Studies on professional knowledge retention · 2 YRS
03 · IN THE FIELD< 34 %

of theoretical training is actually applied in the field.

Research on training transfer (Saks et al.) · IN THE FIELD
04 · THE REBOUND> 90 %

retention when learning is coupled with immediate execution.

Cognitive psychology of active learning · RECOVERY
PROOF 01 / 03

CH. 03 · THE TRAPPROOF 01 / 03 · 4 BEATS

The illusion
of competence

2005WHAT WE THINK WE KNOW VS WHAT WE KNOW

KORIAT, A.&BJORK, R.A.

Journal of Experimental Psychology: LMC, 31(2), 187–194

WHAT WE THINK WE RETAINWHAT WE ACTUALLY RETAIN

We mistake recognizing
for being able to recall.

Re-reading feels like learning without producing learning. The reader mistakes familiarity for mastery — and the decision-maker reading this page is no exception.

PROOF 02 / 03

CH. 04 · THE MECHANISMPROOF 02 / 03 · 4 BEATS

The testing effect

2006RETENTION MEASURED AT ONE WEEK

ROEDIGER, H.L.&KARPICKE, J.D.

The Power of Testing Memory — Perspectives on Psychological Science, 1(3), 181–210

61 %BY TESTING · ACTIVE RECALL
+21 pts
40 %BY RE-READING

Testing beats re-reading. This is ProLearn’s exact mechanism — demonstrated, not asserted.

PROOF 03 / 03

CH. 05 · THE WEIGHT OF EVIDENCEPROOF 03 / 03 · 5 BEATS

The meta-analysis

2006QUANTITATIVE SYNTHESIS · DISTRIBUTED PRACTICE

CEPEDA, N.J.·PASHLER, H.·VUL, E.·WIXTED, J.T.·ROHRER, D.

Distributed practice in verbal recall tasks: a review and quantitative synthesis — Psychological Bulletin, 132(3), 354–380

184ARTICLES
317EXPERIMENTS
839EVALUATIONS

This isn’t a study that can be dismissed.
It’s the synthesis of 184 articles — by five researchers.

CH. 03 · REINFORCED PROOF

2024ACADEMIC MEDICINE · REAL COHORT

26 258

practicing physicians

Randomized study — spaced repetition vs no recall, measured on real practitioners. The largest cohort, the strongest result.

Learning+14.8 pts
NONE43.20 %
SPACED58.03 %
Knowledge transfer+5.9 pts
NONE52.39 %
SPACED58.33 %

“Effect of Spaced Repetition on Learning and Knowledge Transfer in a Large Cohort of Practicing Physicians,” Academic Medicine, 2024.

SCIENCE BECOMES PRODUCT

ProLearn plants its scheduled recalls into the curve — each recall at the optimal moment lifts retention back above the mastery threshold.

The principle demonstrated above, executed: knowledge atoms, spaced recalls, execution in the field. The real product, not a diagram.

And cognitive load? Reducing friction — field-first ergonomics, logistics stress removed — frees mental bandwidth. In industrial settings, that bandwidth is safety.

ProLearn · StudioProLearn Studio interface: storyboard of a training atom, timeline and training plan.
Stats · real-time
ProLearn learner app: module resume, 58% progress, scheduled recall.

DEMONSTRATED — NOT ASSERTED

The science is laid out.
Here’s what we do with it.

Discover the method →SPACED REPETITION, APPLIED