Historians Welcome Contemplated Changes in Human-Research Guidelines

For Bernadette McCauley, a historian, one of the most-trying experiences of her academic career began with an attempt to talk to four elderly nuns.

In late 2004, Ms. McCauley, who teaches American history at the City University of New York's Hunter College, sought to connect several of her students doing research on the city's Washington Heights neighborhood with a group of nuns who had grown up in the area, with plans for an informal conversation. But before she could set up a