Why Most Training Programs Fail to Deliver ROI: The ‘Forgetting Curve’

Let’s talk about a common problem with traditional training—learners forget most of what they’ve learned just six months after training. Yes, even after investing time and resources, the effectiveness can fizzle out. Why?

Ebbinghaus’ ‘Forgetting Curve’ theory from 1870 holds the answer. He showed us that memory fades over time unless the knowledge is revisited. The solution? Repetition and recall. This is where microlearning comes in!

How Much of What’s Learned is Forgotten?

According to Ebbinghaus:

Within minutes, learning retention drops from 100% to 75%.
After 20 minutes, only 58% is remembered.
After 1 hour, it’s down to 44%, and after 1 day, it’s just 33%.
6 days later, just 25% remains. 😱

Clearly, your training effectiveness is at risk! But there’s a way to turbocharge learning through spaced repetition and spaced retrieval.

Turbo-charging Training with Spaced Repetition & Retrieval

These two practices work together to lock in learning:

Spaced repetition: Re-expose learners to content over time. But it’s not just about repeating—timing matters! You need to know when to revisit old content, how to mix it with new learning, and avoid overwhelming learners.
Spaced retrieval: Encourage learners to recall information. The more they recall, the more solid that memory becomes. This can be done through tests, quizzes, or even fun gamified experiences.

How to Implement Spaced Repetition & Retrieval

The big question: how often should you repeat content? Unfortunately, there’s no universal formula. The repetition frequency depends on the difficulty of the material, learner profiles, and your industry.

Here are some pointers:

High-impact content needs frequent repetition.
You can either use a uniform schedule (e.g., repeat content every 2 months) or an expanding schedule (e.g., increase the time gap between repetitions).

How Retrieval Practice Builds Memory

Retrieval practice is key—it’s like jogging your memory to cement the learning. Testing, quizzes, and recall activities are proven to be more effective than just re-studying.

Why These Concepts Work

Together, spaced repetition and retrieval build stronger memory retention, enhance learner performance, and lead to behavior change at work. This makes your workforce more skilled and adaptable, giving your organization a competitive edge.

Let’s look at a real-world example: In a healthcare training experiment, two nurse teams were trained using spaced repetition. But one team also had retrieval-based quizzes every two weeks. The result? The team with retrieval practice showed way more behavioral improvement and applied their training better in real situations!

Final Thoughts

Both spaced repetition and retrieval practice are essential for improving retention and training ROI. Used together, they not only increase knowledge recall but also help employees apply what they’ve learned, becoming masters in their roles.

So, if you want training that actually sticks, it’s time to rethink your learning strategy with microlearning.

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