This research includes minimal risks to human subjects.There are 6 categories of exempt research that involve firsthand data collection

This research is also low-risk, but it requires annual review if the project extends beyond one year. If your participants can’t be anonymous, your project may be reviewed at the expedited level. There are 9 categories of expedited research.

Research that involves more than minimal risk to human subjects may require a more thorough and lengthy review by DU’s IRB. If your research doesn’t fit into the exempt or expedited categories; if it includes minors and/or specially protected populations; if it puts your participants under physical or mental stress, fear, or discomfort; if you collect biomedical samples from your human subjects, your project will need to go through a full IRB review.