How Lexorium schedules reviews

Lexorium spaces each vocabulary card over time so you see a word again when you are likely to need the practice — not on a fixed daily list.

This page explains the scheduling model. For the practice buttons and screens, see Start a review.

The idea

Each card has a half-life: roughly how long Lexorium expects your memory of that word to last. After a successful review, the half-life grows and the card’s next due time moves further out. After a miss, the half-life shrinks and the card becomes due again soon.

New cards start with a short half-life (about one day).

What happens when you answer

When you are correct

• The card’s half-life increases (growth is larger when the half-life is still short).
• The next review is scheduled around “now plus the new half-life.”
• Using a Hint, answering slowly, succeeding on a harder skill, or succeeding in a very supportive sentence grows the half-life a bit less.
• Words that have needed many attempts for you grow more slowly; words you lock in quickly move out faster.

When you are incorrect

• The half-life shrinks.
• The card is typically due again in about 10 minutes.

Half-life stays within a practical range (from minutes up to about a year).

Due cards in Practice

Recommended practice prefers cards whose due time is now or past. If nothing is due, it may still sample a small portion of your other cards so you can keep studying.

Scheduling vs mastery

• Schedule (this page) answers when a card should appear again.
• Mastery answers how Recommended practice should test you next — see Understanding mastery.

Reference

Precise user-visible bounds and failure timing: SRS behavior.