> ## 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.

# Parallel assignment

A study design where different groups of participants receive different treatments at the same time. For example, one group receives drug A while another group receives drug B throughout the trial.

## Related terms

<CardGroup cols={3}>
  <Card title="Study record" href="study_record" />

  <Card title="Quality control (QC) review" href="quality_control_qc_review" />

  <Card title="Study results" href="study_results" />
</CardGroup>

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