# Research with Quantified Cognition

Your everyday studying can contribute to research on how learning varies.
Quantified Cognition turns Anki review history into daily estimates of memory
formation and recall. Sharing those measurements can help us investigate how
learning relates to sleep, activity and study patterns, and improve the methods
used to measure it.

Updated **4 November 2026**. Research enrollment and uploads are currently closed.

## What your contribution helps us learn

Later Anki reviews provide information about how effectively you learned on an
earlier day. Combined with sleep and activity measurements, they let us explore
relationships with total sleep, deep and REM sleep, naps and everyday activity.
The programme also examines how reliable these learning measures are and can
develop new questions and methods within this research area.

We aim to share findings through scientific publications, reports and public
summaries. The research uses observations from everyday life; associations alone
do not establish cause and effect. Missing measurements, device errors and
changes in study habits can affect the findings.

## Taking part

When enrollment opens, adults aged 18 or over can contribute their own data.
You can share existing history and contribute again when you have more data.
There are no extra tests, scheduled visits or required changes to your routine.
Participation is voluntary and unpaid. Your personal results and insights
remain available whether you participate or not.

Each submission is a package of available daily Anki scores, review counts,
uncertainty, follow-up information, sleep stages, nap and step summaries, and
calculation and sharing metadata. You can contribute Anki data alone. The
[privacy policy](PRIVACY.md) describes the included fields in detail.

Card content, individual reviews and review pairs, exact sleep or review times,
provider account IDs, credentials, your name and email are excluded from the
package. You review each package and explicitly send it. Uploads are never
automatic, and saying Yes in the initial sharing prompt sends nothing. We
record the timing of sharing choices to understand whether seeing results
affects participation.

## How your contribution is used

JollyJoyJourney researchers use the data for this research programme. Approved
academic, nonprofit or commercial collaborators may also receive controlled
access under agreements governing use and protection of the data, subject to
provider permission. Collaborators and their roles are identified before
access. Public findings contain anonymous summaries or synthetic examples;
individual daily histories are not published.

Measurements are linked using a random participant ID. Access is restricted, although
unauthorized access or identification from patterns in daily histories remains
a privacy risk.

Submitted measurements support ongoing research, method validation and checking
findings. We regularly review the continuing need and delete or, where
permitted, irreversibly anonymize records that are no longer needed. You can
request deletion, and applicable legal or provider limits take precedence. The
privacy policy explains how recovery copies and consent records are handled.

## Your choice

You can decline, join later or withdraw without losing personal use. Once we
receive a withdrawal, we stop research use of the affected records and arrange
deletion, including controlled collaborator copies. Already published anonymous
findings remain available. Use the add-on's deletion controls or contact us if
you can no longer access them.

Before joining, you can read and save this information and the policy. The
add-on checks eligibility, then asks you to confirm the consent statement and
select **Agree and join research**. Your consent is linked to your existing
participant ID. Consent records are kept separately from daily measurements,
and you can save a copy. The consent statement is:

> I confirm that I am at least 18 and am contributing my own data. I have read
> the research information and privacy policy. I explicitly consent to
> JollyJoyJourney processing my submitted daily learning, recall, sleep and
> activity measurements, including health-related data, for this research
> programme, with controlled access by approved research collaborators as
> described. I understand the retention criteria, that each upload requires my
> confirmation, and that I can withdraw without losing personal use.

The programme is operated by JollyJoyJourney, with Christian Kleineidam
responsible for the research. For questions, contact
[contact@jollyjoyjourney.com](mailto:contact@jollyjoyjourney.com).