The expanding purview: institutional review boards and the review of human subjects research.

The implications of the institutional review board (IRB) system's growing purview are examined. Among the issues discussed are whether IRBs are censoring research and whether the IRB review process fundamentally alters the research that is being conducted. The intersection between IRB review and free speech is also explored. In general, it is argued that the review system for human subjects research (HSR) should be modified in order to limit the scope of IRB review.