SigmaCards – Flashcard Tool

🃏 SigmaCards

Practice every term from the MethodsLab and Bayes Thinking Lab (BTL) glossary here as digital flashcards — filtered by topic, in random or progress-driven order. The name plays on σ (sigma): the unsystematic noise, the error term left over in every dataset. At the start, this noise in your own knowledge is usually still large — with every card you commit to memory, it should shrink a little.

Every term is shown at least twice: mark it "✓ Know it" the first time, and it becomes "Learning" — not yet consolidated as "Known". Only once you get it right a second time does it count as "Known". The counters below show your progress, which is saved automatically in this browser.

New: 0 · Learning: 0 · Known: 0 Card 0/0

✓ Know it moves a card one stage forward (New → Learning → Known) · ✗ Again sends it back to New

Click or press Space to flip

📖 How do the flashcards work?

The flashcards draw live on the terms from the MethodsLab and BTL glossary — each card shows the term name on the front, and the definition plus formula on the back.

Flip – Click the card or press Space.

Category – Pick one or more areas to practice only those terms.

🔀 Shuffle – Puts the current selection into a new random order.

How does "New → Learning → Known" work?

Every card has one of three progress stages, stored only in this browser (no account, no server). Your category selection and current position in the deck are also saved locally — close the browser and come back later, and you'll pick up exactly where you left off.

New – Starting state. Never confirmed with "✓ Know it" yet (or just fell back, see below).

Learning – You clicked "✓ Know it" exactly once. Knowing it once doesn't yet count as securely learned.

Known – You clicked "✓ Know it" twice in a row (confirmed once more from "Learning").

Important: A single "✗ Again" immediately sends a card back to "New" — whether it was previously "Learning" or "Known". Only your latest self-assessment counts, not an accumulated score.

The benefit: on the next round (after "🔀 Shuffle" or a category change), cards from "New" and "Learning" are shown first; "Known" ones less often — so you spend your time on what's still shaky.

Shortcuts: Space/Enter = flip, ← / → = previous/next card, once flipped: 1 = Again, 2 = Know it.

SigmaCards Flashcard Tool

📖 How do the flashcards work?

How does "New → Learning → Known" work?