Follow the Science - the Testing Effect

What the evidence says about... retrieval practice

Andrew from Rollama

5/21/20252 min read

Chart of learning outcomes of reading vs. testing
Chart of learning outcomes of reading vs. testing

Understanding the Testing Effect: The Science of Remembering

At Rollama, we don't just create fun English learning games – we engineer effective learning experiences based on cognitive science. One of the most powerful learning principles we've incorporated into our platform is the Testing Effect.

What is the Testing Effect?

The Testing Effect (also known as retrieval practice) is a well-established psychological principle demonstrating that actively recalling information through testing creates stronger memory traces than passive review methods like re-reading. When you retrieve information from memory, you're not just measuring what you know – you're actually strengthening the neural pathways that help you remember that information in the future.

In simple terms: being tested on material doesn't just show what you've learned – it actually enhances learning itself.

The Research Behind the Testing Effect

This isn't just educational theory – it's backed by decades of research:

  • In a landmark 2008 study published in Science, researchers Karpicke and Roediger found that students who practiced retrieving information through tests remembered about 80% of the material a week later, while those who merely studied the information repeatedly remembered only about 40%.

  • A 2010 review by Dunlosky and colleagues identified retrieval practice as one of the most effective learning techniques, outperforming highlighting, rereading, and other common study methods.

  • Neuroimaging studies have shown that successful retrieval activates the hippocampus and prefrontal cortex – brain regions critical for forming lasting memories.

How Rollama Implements the Testing Effect

At Rollama.com, we've integrated the Testing Effect throughout our platform:

1. Gamified Retrieval Practice

Every Rollama game challenges you to actively recall vocabulary, grammar patterns, and language concepts. Whether you're racing against the clock or competing against others, you're constantly practicing retrieval – not just reviewing information passively.

2. Spaced Repetition System

We don't just test you once and move on. Our sophisticated algorithm tracks which items you find difficult and automatically schedules those for more frequent testing, optimizing the timing of retrieval practice for maximum learning efficiency.

3. Immediate Feedback

Research shows that the Testing Effect is even stronger when learners receive immediate feedback. That's why every Rollama game provides instant feedback on your answers, helping you quickly correct misconceptions and strengthen accurate memories.

4. Low-Stakes Testing Environment

Traditional tests can create anxiety that interferes with learning. Rollama's gamified approach provides all the cognitive benefits of testing without the stress. Our users practice retrieval in an engaging, low-pressure environment that makes learning enjoyable.

The Results: Faster, More Durable Learning

By harnessing the Testing Effect, Rollama users typically experience:

  • Stronger retention of vocabulary and grammar patterns

  • More efficient learning compared to traditional study methods

  • Better application of language knowledge in real-world situations

  • Increased confidence in their English abilities

The Testing Effect isn't just a scientific curiosity – it's a powerful tool for language acquisition. By building our platform around this proven learning principle, we've created an English learning experience that's not just fun, but scientifically designed for maximum effectiveness.