# Pre-registered experiment

Source: https://onco.cc/terms/pre-registered-experiment/  
OnCo record `pre-registered-experiment` (Term). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

Pre-registration means writing down the hypothesis, the analysis and the success criterion before running the experiment, so the result cannot be quietly redefined afterwards.

## Summary

Preregistration is the practice of registering the hypotheses, methods or analyses of a study before it is conducted; clinical trial registration is the medical form and registered reports add peer review before data collection (Wikipedia). For a modelling experiment it means committing the split, the metric and the threshold that counts as success in advance, the same discipline trials apply to primary endpoints.

## Fields

- Kind: Term
- Last checked: 2026-09-24
- Also known as: pre-registered experiment; pre-registration; preregistration; preregistered; pre-specified success criterion; registered report
- Tags: cansim-terms

## Notes

- Listed in the CanSim terms map 1.0.0 (docs/onco/terms.json, generated 2026-09-24), CC BY 4.0, attribution: CanSim project, an open, public-data-first cancer foundation-model programme; CanSim page path /terms/pre-registered-experiment.

## Sources

- Wikipedia: https://en.wikipedia.org/wiki/Preregistration_(science)
- Wikipedia: https://en.wikipedia.org/wiki/Preregistration_(science)

## Connected records

- terms: [Cancer AI vocabulary (CanSim terms map)](https://onco.cc/terms/cancer-ai-vocabulary/), [Reproducibility and negative results](https://onco.cc/terms/reproducibility/), [Train, validation and test split discipline](https://onco.cc/terms/train-test-discipline/), [Trial protocol and statistical analysis plan](https://onco.cc/terms/trial-protocol/)

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JSON: https://onco.cc/api/v1/entities/pre-registered-experiment.json