> ## Documentation Index
> Fetch the complete documentation index at: https://glossary.micahealth.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Intervention model

The overall method used to assign different treatments to study participants, including single group, parallel, cross-over, or factorial designs.

## Related terms

<CardGroup cols={3}>
  <Card title="Observational study" href="observational_study" />
</CardGroup>

[*Source*](https://clinicaltrials.gov/study-basics/glossary)