Chambers D W, Eng W R
School of Dentistry, University of the Pacific, USA.
W V Dent J. 1995 Apr;69(2):17-23.
This paper combines data from two surveys, one in 1986 and one in 1992, which used the same instrument. Practice problems, and responses to the problems, were found to differ according to the number of years in practice, validating a stage explanation of professional growth.
