Try contacting Peggy Lowry; she's done some good research on this area.

Julie

Julie B. Cole, CRA
Director, Research and Sponsored Programs
P.O. Box 7528, Reynolda Station
Wake Forest University
Winston-Salem, North Carolina 27109
(910) 759-5888
(910) 759-1959 FAX (note new fax #)
xxxxxx@wfu.edu