A principal investigator (PI) is the lead scientist or engineer for a particular well-defined science (or other research) project, such as a laboratory study or clinical trial. It is often used as a synonym for "head of the laboratory" or "research group leader ", not just for a particular study.
In the context of USA federal funding from agencies such as the NIH or the NSF, the PI is the person who takes direct responsibility for completion of a funded project, directing the research and reporting directly to the funding agency. For small projects (which might involve 1-5 people) the PI is typically the person who conceived of the investigation, but for larger projects the PI may be selected by a team to obtain the best strategic advantage for the project.
In the context of a clinical trial a PI may be an academic working with grants from NIH or other funding agencies, or may be effectively a contractor for a pharmaceutical company working on testing the safety and efficacy of new medicines.
Read more about Principal Investigator: Certification For Principal Investigator
Famous quotes containing the words principal and/or investigator:
“The principal difference between love and hate is that love is a irradiation, and hate is a concentration. Love makes everything lovely; hate concentrates itself on the object of its hatred.”
—Sydney J. Harris (b. 1917)
““O human creature, ... you are the investigator without knowledge, the magistrate without jurisdiction, and all in all, the fool of the farce.””
—Michel de Montaigne (1533–1592)