What Is Spaced Repetition and How Do You Use It?

Published 11 August 2026

Spaced repetition isn't "repeat the training." It's repeating it on a schedule that gets longer each time, timed to land just before you'd otherwise forget.

Key Findings

A 2008 study by Cepeda, Vul, Rohrer, Wixted, and Pashler, published in Psychological Science and involving over 1,350 participants, found that increasing the gap between study sessions first improves and then reduces final test performance, meaning there's an optimal gap rather than "more spacing is always better."
That same study found the optimal gap between sessions was roughly 10 to 20% of how long the information needs to be retained; for content you need remembered a week later, that's a gap of roughly half a day to a day and a half.
Spaced repetition is different from simply repeating content on a fixed schedule: it specifically increases the interval between reviews as the learner demonstrates retention, rather than reviewing everything at the same fixed frequency regardless of performance.
TalentCards (Epignosis) includes a dedicated spaced repetition feature. QuikAuthor does not currently have a spaced repetition scheduling feature.
Spaced repetition's evidence base comes primarily from vocabulary and fact-recall research; its application to complex workplace skills and judgment-based training is less directly studied, though the underlying spacing mechanism is not skill-specific.

What Is Spaced Repetition and How Does It Actually Work?

Spaced repetition is a review technique where the interval between each review of the same material increases over time, based on how well the material has been retained so far. The first review might happen a day after initial learning, the next a few days later, the next a week or two after that, and so on. The interval expands specifically because each successful recall makes the memory more durable, meaning it can tolerate a longer gap before the next review is needed.

This is different from simply repeating training on a calendar schedule. A monthly refresher webinar repeated every month regardless of performance is repetition. Spaced repetition adjusts the gap based on what's actually being retained, extending it for material the learner clearly knows and shortening it for material they're shaky on.

How Is Spaced Repetition Different From Just Repeating Training Content?

Fixed repetition reviews everything on the same schedule (every month, every quarter) regardless of how well any individual piece of content has been retained.
Spaced repetition varies the interval per item, extending it as retention improves and shortening it where it hasn't.
Fixed repetition is easier to schedule and administer. Spaced repetition requires tracking performance per item, which is why it's usually implemented as a software feature rather than a manual training calendar.
Fixed repetition risks reviewing material the learner already knows cold just as often as material they're struggling with, which wastes time on the former and under-serves the latter.

What's the Ideal Interval Between Spaced Repetition Sessions?

There's no single fixed number; the optimal gap depends on how long the information needs to be retained. The clearest research on this comes from Cepeda et al.'s 2008 study, which tested gaps ranging from a few minutes to several months and measured recall up to a year later. The finding: for information that needs to be retained about a week, the optimal gap between the first and second study session was roughly 10 to 20% of that retention period, meaning a gap of half a day to a day and a half. For information that needs to be retained a year, the optimal gap, as a proportion of that longer retention period, was smaller: roughly 5 to 10%.

The practical takeaway is that the gap should scale with how long you need the material remembered, not stay fixed regardless of the training's purpose.

A Practical Spaced Repetition Schedule

Time since first learning	What happens	Why
Same day	Initial learning and immediate check	Establishes baseline; not yet spacing
1–2 days later	First spaced review	Falls within the research-backed optimal gap for short-term retention
1 week later	Second review, extended interval	Interval increases because the first review demonstrated some retention
2–4 weeks later	Third review, further extended	Continues extending for material recalled successfully each time
Item missed at any review	Interval resets to a shorter gap	Material not yet retained needs closer-spaced review, not a longer gap

How Do You Build a Spaced Repetition Schedule Without Special Software?

Identify the specific facts or decisions that need long-term retention, not the entire course content
Set a first review one to two days after initial training, not a week or more
Track, even in a simple spreadsheet, which items each learner got right or wrong at each review
Extend the interval for items answered correctly; shorten it for items answered incorrectly
Accept that this becomes difficult to manage manually past a handful of learners or items, which is why most spaced repetition implementations end up software-based despite starting as a manual process

Does Spaced Repetition Work for Corporate Training or Just Language Learning?

The mechanism isn't language-specific. Language learning apps popularised spaced repetition because vocabulary recall is easy to measure (right or wrong, per word), which makes the scheduling logic simple to automate. Corporate training content, like compliance facts or product knowledge, is often similarly discrete and checkable, so the same mechanism applies reasonably well. Where it gets harder is judgment-based or skill-based training, where "correct" isn't a single checkable answer, and the research base specifically testing spaced repetition against that kind of content is thinner than the vocabulary and fact-recall research it's best known for.

FAQ

What is spaced repetition and how does it actually work?

It's a review method where the gap between each repeat review of the same material grows over time, based on whether the learner correctly recalled it last time. Material recalled correctly gets a longer gap before its next review; material recalled incorrectly gets a shorter one.

What's the ideal spaced repetition schedule for onboarding content?

There's no universal schedule, but starting the first review one to two days after initial training, then extending to roughly a week, then two to four weeks, follows the general pattern the spacing-effect research supports for content that needs to be retained over weeks to months.

Does spaced repetition improve compliance training pass rates?

The underlying spacing mechanism has strong general research support for improving long-term recall of discrete, checkable facts, which describes most compliance content. There isn't a large body of research measuring "spaced repetition" specifically against compliance pass rates as an outcome.

Can you use spaced repetition without special software?

Yes, in principle, by manually tracking per-item performance and adjusting review intervals. In practice this becomes difficult to sustain past a small number of learners or content items, which is why it's usually implemented as a platform feature.

What's the difference between spaced repetition and microlearning?

Microlearning describes the format: short, standalone content units. Spaced repetition describes the scheduling logic: reviewing the same material at increasing intervals based on retention. Microlearning's short units make spaced repetition easier to implement, but the two aren't the same thing, and you can have either without the other.

Where We're Honest About Our Own Gap

QuikAuthor doesn't currently have a dedicated spaced repetition scheduling feature. TalentCards (Epignosis) does, and if a scheduled, adaptive review engine is the specific feature you need, that's a real point in its favour. What QuikAuthor's short-format course structure does support is manually sequencing content into separate, revisitable modules, which gives you the building blocks for a spacing schedule even without automated interval adjustment.

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