> ## 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.

# Factorial assignment

A study design where different groups receive various combinations of treatments and placebos to test multiple interventions simultaneously. For example, some participants might receive both drug A and drug B, while others receive one drug and one placebo, or two placebos.

## Related terms

<CardGroup cols={3}>
  <Card title="Protocol" href="protocol" />

  <Card title="Informed consent form (ICF)" href="informed_consent_form_icf" />
</CardGroup>

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