Before the exam, most people do the same thing: open the question list and read from top to bottom. Familiar answers feel obvious — so you think you're ready. Then the consul asks one of those 'obvious' questions — and your mind goes blank.
The problem isn't that you didn't study. The problem is that forgetting is predictable: fast at first, slow over time. If you review on a schedule that accounts for this curve, the material stays in memory with far less effort.
This pattern was documented back in 1885 by psychologist Hermann Ebbinghaus: 20 minutes after learning, we remember about 60% of the material; after a day, just 33%; after a week, around 25%. But each review at the «right moment» raises the curve and locks the memory in for longer. That's exactly what SM-2 implements.
How the algorithm works
PLTest uses the SM-2 algorithm — the same one that powers Anki and other serious memorisation systems. Each card has two parameters:
- Interval — how many days until you see it again
- Ease factor — a difficulty coefficient personal to you (starts at 2.5)
Answer correctly — the interval multiplies by the ease factor and grows. Answer wrong — the card comes back tomorrow and the ease factor drops: the algorithm now knows this question is harder for you and will show it more often.
What happens if you miss a day?
Nothing critical. PLTest shows all 'overdue' cards the next time you open it — ease factors and intervals are preserved. But the longer the gap, the more questions pile up in the queue. So it's better to practice 10 minutes daily than skip a week and try to catch up in one session.
What is Error Deck and how do you use it?
Error Deck is a dedicated mode for questions you got wrong. You choose how many times in a row you want to answer correctly (1, 2 or 3), then work through those cards until every one graduates.
A card leaves Error Deck only when you answer it correctly the required number of times in a row — without a single mistake.
The exit threshold — 1, 2 or 3 correct answers in a row — is your call. For fact-based questions (dates, numbers) we recommend 2–3: one correct answer doesn't mean the material has stuck. For questions with longer descriptions, a threshold of 1 can be enough when you're first working through the deck.
The official oral exam format for Karta Polaka and Stały pobyt requires answers in Polish with no hints — which is exactly why memory training matters more than simple reading.
Why this beats PDFs and Telegram groups
A PDF doesn't know you've confused the date of Poland's Constitution seven times in a row. PLTest remembers every mistake and builds a personal review schedule around it.
After 2–3 weeks of daily practice, cards you know well disappear for weeks at a time. What remains is exactly what still needs work — nothing more.
How to get started with Error Deck
Open PLTest and work through the first 10–15 questions in flashcard mode. The ones you get wrong are automatically flagged — they'll appear in Error Deck. No manual setup needed: the algorithm maintains and updates the list after every session.
Recommended approach: every day, open Error Deck first — before your regular practice. Work through all current cards to the end, then move on to new questions. This way weak questions never pile up and you maintain a steady preparation pace.
When Error Deck is empty — what's next?
An empty Error Deck is a good sign, but not the finish line. It means questions you previously struggled with have consolidated enough for their current ease factor. SM-2 will keep returning them at growing intervals — 2 weeks, a month, three months. Answer correctly and the interval grows again. Make a mistake and the card goes back into Error Deck automatically.
The next step after an empty Error Deck is Mock Exam — a simulation of the real interview: 20 questions in 10 minutes, with a passing threshold of 15/20. Mock Exam doesn't test individual cards; it tests your ability to answer quickly and fluently under pressure — exactly what the consul will expect.