What is Spaced Repetition (SRS)?

How Spaced Repetition Works

• Core Idea: Based on the psychological principle known as the "spacing effect," which shows that spreading out study sessions over time leads to better long-term recall than massed practice (e.g., repeating something 10 times in a row). It also ties into Hermann Ebbinghaus's "forgetting curve," which illustrates how memories fade exponentially unless reinforced.
• Repetition Timing: You review a new word or fact right after learning it, then again after a short delay (e.g., 10 minutes), then longer (e.g., 1 day), and progressively longer intervals (e.g., 3 days, 1 week, 1 month) as you get it right. If you forget, the interval resets or shortens to rebuild strength.
• Optimal Number of Repetitions: There's no fixed "right number" for everyone—it depends on the individual, the material's difficulty, and how well you recall it each time. Algorithms in apps adjust this dynamically, but research suggests 5–10 well-spaced reviews over weeks or months can embed something into long-term memory. The key is quality over quantity: active recall (testing yourself) beats passive rereading.

Why It's Effective for Language Learning

In contexts like vocabulary building, it maximizes efficiency by focusing effort on items you're about to forget, rather than over-reviewing easy ones. Studies (e.g., from cognitive psychology) show it can double or triple retention rates compared to traditional methods.

The Flashmate

Spaced repetition is a learning technique that schedules each review at the exact moment you are about to forget — reinforcing memory right before it fades. Unlike re-reading notes or cramming, spaced repetition uses an algorithm (in TheFlashMate's case, SM-2) to adapt review intervals to your individual performance. Cards you find easy get pushed further into the future; cards you struggle with come back sooner. The result is dramatically better long-term retention with significantly less study time.

• SRS algorithms will handle the scheduling for you—the app prompts reviews at ideal times.
• For example, if you're learning Spanish, you will see "perro" (dog), and this is a new word for you, quiz yourself initially, and the app might remind you about it the next day, then in 4 days, then maybe 1 week and so on.