| Year | Subject | Role |
| 1982 | Independent | |
| 1983 | Library Readers | |
| 1985 | Independent | |
| 1986 | Library Readers | |
| 1987 | Library Readers | |
| 1988 | Library Readers | |
| 1989 | Independent | |
| 1994 | Pricinipal Investigators | |
| 2002 | Summer Investigators | |
| 2003 | Visiting Principal Investigators | |
| 2004 | Whitman Investigators | |
| 2005 | Whitman Investigators | |
| 2006 | Whitman Investigators | |
| 2007 | Whitman Investigators | |
| 2008 | Whitman Investigators | |
| 2009 | Whitman Center Investigators | |
| 2010 | Whitman Center Investigators | |
| 2011 | Whitman Center Investigators | |
| 2012 | Investigator | |
| 2013 | Investigator | |
| 2014 | Principal Investigator | |
| 2015 | Whitman Center Scientist | |
| 2016 | Whitman Scientist | |
| 2017 | Whitman Center Associate |
| Year | Start Date | End Date | Subject | Role |
| 1985 | - | - | Corporation Member | |
| 1986 | - | - | Corporation Member | |
| 1987 | - | - | Corporation Member | |
| 1988 | - | - | Corporation Member | |
| 1989 | - | - | Corporation Member | |
| 1990 | - | - | Corporation Member | |
| 1991 | - | - | Corporation Member | |
| 1992 | - | - | Corporation Member | |
| 1993 | - | - | Corporation Member | |
| 1994 | - | - | Corporation Member | |
| 1995 | - | - | Corporation Member | |
| 1996 | - | - | Corporation Member | |
| 1997 | - | - | Corporation Member | |
| 1998 | - | - | Corporation Member | |
| 1999 | - | - | Corporation Member | |
| 2000 | - | - | Corporation Member |