Remembering Douglas N Jackson, Ph.D.

A great man was born this day in 1929, Douglas Northrup Jackson III, founder of SIGMA Assessment Systems. Dr. Jackson committed his lifework to research in human assessment. He published prolifically in the areas of personality, personality assessment, and test development methods. His psychological tests and assessments continue to have worldwide presence.

11 years after his passing, we continue to honor his legacy with our ongoing commitment to excellence in test development.