The Science
Passively reading a word list creates a false sense of knowing. You recognize the word when you see it, but can't retrieve it when you need it. Active recall forces your brain to pull the answer from memory under time pressure — strengthening the neural pathway every single time.
Karpicke & Roediger (2008), "The Critical Importance of Retrieval for Learning", Science 319(5865)
The SM-2 algorithm, originally developed by Piotr Wozniak in 1987, calculates the optimal moment to review each word — right before you would forget it. Words you know well appear less frequently. Words you struggle with come back sooner.
Pimsleur (1967), "A Memory Schedule"; Wozniak & Gorzelanczyk (1994), "Optimization of Repetition Spacing"
In the game, the "loot" you're collecting is a real skill.
Key finding: Game-based learning environments produce significantly higher engagement, motivation, and knowledge retention compared to traditional instruction methods.
Landers (2014), "Developing a Theory of Gamified Learning", Computers & Education 71
Research shows that the most frequent 1,000 words in many languages cover a large share of everyday spoken communication. Our curated list of the 1073 most common Swedish words gives beginners the fastest path to comprehension.
Nation (2001), 'Learning Vocabulary in Another Language', Cambridge University Press
Learning that feels easy often doesn't last. Controlled difficulty creates stronger, more durable memories.
Bjork & Bjork (2011), 'Making Things Hard on Yourself, But in a Good Way'
Mixing different categories of words (food, transport, greetings) in random order produces better learning than studying one category at a time.
Rohrer & Taylor (2007), Journal of Educational Psychology
Taking a test on material produces better retention than additional study time — even without feedback. Our game tests you on every single word.
Roediger & Karpicke (2006), Psychological Science
Browse the Swedish word list or learn why we built LearnSwedishFast.
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