Reported is a validation study of the Dubin technical updating model, one which identifies variables that may be combined with expectancy theory to predict whether or not engineers will need technical updating. The basic hypothesis is that the likelihood of engaging in updating activities is a function of individual motivation and characteristics of the work environment. To obtain information about work environments, researchers developed the Work Description Questionnaire for Engineers (WDQE). A factor analysis of data provided by over 400 practicing engineers and supervisors led to the development of a final version of the WDQE, which was then administered to an additional 500 engineers. Results generally validated the Dubin model and indicated that valence-instrumentality-expectancy theory can be a useful framework for understanding individual motivation and its impact upon technical updating. It is suggested that the WDQE can provide an organization with information that can facilitate technical updating by its employees. (Author/WB)