The Science Behind Flashcards, Quizzes, and Spaced Repetition

Ever feel like you study for hours only to forget everything a week later? You are not alone. It is a proven psychological phenomenon.

Back in the late 19th century, psychologist Hermann Ebbinghaus discovered the Forgetting Curve: the idea that humans naturally lose roughly 50% of all new information within a single day, and about 80% within a month if no active attempt is made to retain it.

Fortunately, cognitive science has also given us the antidote. Here is the exact science behind how Ankra's features help you beat the forgetting curve and achieve real mastery.

Flashcards and the Power of Active Recall

Many people study by rereading notes or highlighting textbooks. While this feels productive, cognitive scientists call this passive review. It creates an illusion of competence: you recognize the information when it is in front of you, but you cannot pull it out of your brain on your own.

Flashcards force you to use active recall.

When you look at the front of a card and search for the answer before flipping it, you are actively firing neural pathways. A landmark study published in Psychological Science in the Public Interest evaluated various learning techniques and rated practice testing as having high utility for students of all ages and abilities, far outpacing highlighting and rereading [1].

The takeaway: do not just look at the answers. Force your brain to do the heavy lifting of pulling the memory forward.

Multiple-Choice Quizzes: Recognition and Context

Flashcards are powerful for pure recall. Multiple-choice quizzes serve a different, equally important purpose. They train your brain in recognition and discrimination.

Multiple-choice questions require you to identify the correct answer from similar-looking options based on context. This is especially effective for:

• Learning nuanced differences between similar concepts.
• Simulating real exam environments like board exams or language certifications.
• Bridging the gap when a concept is still too new for cold recall.

Research from Washington University in St. Louis found that taking multiple-choice tests can improve later recall of the same material, a phenomenon known as the testing effect. The act of choosing between options actively reinforces the correct memory trace [2].

Spaced Repetition: Working With Your Brain

If flashcards are the vehicle, spaced repetition is the engine.

Instead of showing you the same cards every day until you burn out, the spaced repetition algorithm in Ankra calculates the exact moment your brain is about to forget a concept and surfaces it for review right then.

Get a card right and the app waits longer before showing it again: one day, then four days, then ten. Get it wrong and the interval shrinks. Research published in the Journal of Experimental Psychology shows that when learning is spaced out over time rather than crammed into a single session, long-term retention increases dramatically [3].

By spacing your reviews, you are not just memorizing. You are transferring information from short-term working memory into long-term storage.

Getting the Most Out of Your Study Sessions

A few quick tips to put this science into practice in Ankra:

• Keep sessions short. You do not need to study for hours. A quick two-minute batch on a coffee break keeps your spaced repetition on track.
• Be honest with your ratings. When Ankra asks how hard a card was, be honest. The algorithm needs accurate input to map your personal forgetting curve.
• Mix it up. Use flashcards when you need to know something by heart, and switch to quizzes when you want to test contextual understanding or prepare for a specific exam.

Sources

1. Dunlosky, J., et al. (2013). Improving Students' Learning With Effective Learning Techniques. Psychological Science in the Public Interest, 14(1), 4-58.
2. Roediger, H. L., & Marsh, E. J. (2005). The positive and negative consequences of multiple-choice testing. Journal of Experimental Psychology: Learning, Memory, and Cognition, 31(5), 1155.
3. Cepeda, N. J., et al. (2006). Distributed practice in verbal recall tasks: A review and quantitative synthesis. Psychological Bulletin, 132(3), 354.