This article examines whether results obtained by using a Herzberg type written questionnaire are significantly different from those obtained when Herzberg's oral interview procedure is employed. Furthermore, many replications of the Herzberg methodology had been made in the aspects of subject utilization, data reduction, data analysis, and interpretation. Moreover, it was possible to obtain statistically similar results using oral and written data collection techniques and therefore deflate somewhat the criticism of method dependence. Finally, though findings continues to be open to speculation, it is possible to replicate the original results by controlling crucial aspects in the experimental process.