Spaced Repetition for the Spanish Driving Theory Test

Spaced repetition is a study technique that spreads reviews out over time: you see each item again just when you are about to forget it, and every time you remember it well, the next review moves a little further away.

It rests on two classic findings from memory research. The first is the forgetting curve, described by Hermann Ebbinghaus in 1885: what we learn fades quickly at first and more slowly afterwards. The second is the spacing effect: a meta-analysis published in Psychological Bulletin in 2006 concluded that spreading study across separate sessions improves long-term recall compared with massing it into one.

This is especially useful for the theory test for the permiso B (standard car licence). You need to remember hundreds of rules, signs and exceptions on exam day, not just on the evening you studied them.

Retaking a test straight after you finish it gives a false sense of mastery. The second time, you remember the answer from a few minutes ago, not necessarily the rule behind it, and that does not mean you will still remember it in two weeks.

On top of that, every question in the theory test has three options. If you answer at random you are right one time in three, so a single correct answer does not prove you know it. What does prove it is getting it right again days later, after you have had time to forget.

That is why it pays to measure progress with questions you have not seen recently and to review your mistakes at intervals, instead of repeating the same test back to back.

There is no official schedule, but the pattern is always the same: review a mistake soon, and let each correct answer push the next review further out. This is the schedule DriveIQ 3.0 applies to a question you keep answering correctly:

These intervals are a guide: the algorithm adjusts them to each question and to your history, and if you miss a question again, its schedule restarts with short reviews. The key idea is frequent reviews at first, then wider and wider gaps once the answer has settled.

DriveIQ 3.0 schedules reviews with FSRS (Free Spaced Repetition Scheduler), an open-source algorithm from the Open Spaced Repetition project that the flashcard app Anki also offers as an option. For each question and each learner it estimates two things: how long the memory will last and how hard that question is for you. From that it works out when the chance of remembering it drops to 90% and schedules the review for that moment.

We adjusted the model using our own learners' answers. FSRS's default values, designed for flashcards, overestimated how much our learners remembered, so DriveIQ brings reviews forward.

Each practice session is built in this order:

1. Questions you got wrong at least 10 minutes ago, so you fix them while the explanation is fresh.
2. Pending reviews, starting with the ones you are closest to forgetting. They take up at most half the session, so you keep moving through the syllabus.
3. New questions from every topic, in proportion to each topic's weight in the question bank, with a little extra from your weak topics and a difficulty close to your level.

If you add your exam date, reviews get more weight in the final week and the recall target goes up, so you arrive with everything reviewed.

Making the most of spaced repetition is not about studying more hours but about spreading them better:

• Study a little every day instead of cramming at the weekend. Several short sessions use the spacing effect better than one long one.
• Do your pending reviews first, then the new questions.
• Read the explanation for every mistake and remember the rule, not the wording of the answer.
• Once you have seen questions from every topic, add full mock exams of 30 questions in 30 minutes.
• If you know your exam date, add it so that the final week goes mostly on reviews.

There is no fixed number of days to be ready: it depends on where you start and how consistent you are. A good sign is passing several mock exams in a row with 3 errors or fewer.

These are the most common mistakes when preparing the theory test, and how to avoid them:

• Memorising the wording of the answer. Exam questions are not necessarily phrased like practice questions; if all you remember is "it was B", you will miss the variant.
• Only reviewing what you already know. Getting easy questions right is motivating, but it does not bring you closer to a pass as much as working on your weak topics.
• Leaving reviews until the end. If you cram all your reviewing into the last few days, you will forget part of what you studied at the start before the exam.
• Trusting a single correct answer. With three options, one correct answer can be luck; wait until you get it right at the next review too.

Spaced repetition does not replace understanding the rules, but it makes sure what you study is still there on exam day. Review mistakes soon, let correct answers spread out and measure your level with full mock exams. You can practise with this method at www.driveiq.es. Always check the current exam conditions on the DGT's online portal (sede electrónica).