# How to remember what you study: recall and spaced review

Canonical: https://romeoapps.app/en/dual-n-back/remember-what-you-study/
Author: Roméo Gambino · Published: 2026-09-08 · Updated: 2026-09-08 · App: Dual N-Back (https://romeoapps.app/en/dual-n-back/)

Use active recall, feedback and spaced review to study a subject. Follow a concrete example and understand how learning a course differs from dual n-back.

## Start with the material you want to remember

To remember a course, practise retrieving the course content itself. Choose a small topic and write questions that require an explanation, not just recognition of a highlighted phrase. For example: what does this concept mean, when does it apply, and how does it differ from a related concept? This guide proposes a study workflow, not a guaranteed grade or IQ increase.


## What is active recall?

Active recall means trying to produce an answer from memory before looking at the source. Read a short passage, close it and explain the idea in your own words. Karpicke and Roediger’s 2008 vocabulary-learning experiment found a benefit of repeated retrieval for delayed recall. That result supports studying through retrieval, but it does not mean rereading is always useless or that every learning task works identically.


## A practical example with feedback

After a lesson on photosynthesis, close your notes and explain the roles of light, water and carbon dioxide. Then reopen a reliable course source and correct omissions or mistakes. Write a new question about the part you misunderstood. This is an illustrative example, not a tested lesson plan. Checking the answer matters: repeating an incorrect explanation without correction does not establish mastery.


## How should you space reviews?

Return to the questions on separate occasions and try answering before checking your notes. Cepeda and colleagues’ 2008 study found that useful spacing depends on how long the information must be retained. There is no single interval that is best for every person, subject and deadline. If you repeatedly cannot retrieve an answer, revisit the explanation and review sooner; adjust the schedule to your results.


## How do you know whether you learned it?

Use new questions, examples or problems that require the same knowledge. Separate correct answers produced without help from answers recognised after opening the notes. Keep a brief record of recurring errors and check again later. Feeling familiar with a page is not the same observation as explaining its content independently. For an exam, include practice in the actual question format.


## Where does dual n-back fit?

Dual n-back practises comparison and updating within a continuing sequence of positions and sounds. It does not teach the facts in your course, and a higher n-back level is not proof of better exam performance. If you enjoy that separate exercise, the Dual N-Back iPhone app offers it. Keep study time focused on your subject and evaluate each activity against its own objective.

[How to increase your IQ: evidence and dual n-back](https://romeoapps.app/en/dual-n-back/how-to-increase-iq/)
[What is working memory? A plain-language explanation](https://romeoapps.app/en/dual-n-back/what-is-working-memory/)

## Further reading

- Karpicke & Roediger (2008), The Critical Importance of Retrieval for Learning — https://doi.org/10.1126/science.1152408
- Cepeda et al. (2008), Spacing effects in learning: a temporal ridgeline of optimal retention — https://pubmed.ncbi.nlm.nih.gov/19076480/
- Soveri et al. (2017), Working memory training revisited — https://link.springer.com/article/10.3758/s13423-016-1217-0