Strong Interest Inventory® (Strong®)

“if there is one fundamental assessment tool to know and understand, the Strong is it...” -Prince and Heiser, 2000

A Career Preferences Assessment 


The Strong Interest Inventory© is based largely on the work of psychologist E K. Strong, Jr., who worked most of his career at Stanford University. Initially, a group of psychologists were working fervently to determine how to place WW1 recruits in the most productive positions. After the war, these psychologists, led by Strong, recognized the potential importance of the assessment work within the civilian population. The Strong was first published in 1927.

In the 1970’s, John Holland’s RIASEC code was introduced into the Inventory. Holland defined 6 occupational themes (Realistic, Investigative, Artistic, Social, Enterprising and Conventional) that can be used quite effectively in understanding an individual’s career preferences.


The Strong Interest Inventory assessment is one of, if not the, most widely respected instruments in the world for assisting individuals in connecting their interests with educational, career and/or leisure activities. It has been designed to be an effective decision making bridge for choosing college majors and/or graduate studies, careers, career changes and for those that are retired and looking for meaningful ways of spending time.

Administration and Interpretation

The Strong can be taken easily online and takes approximately 30-45 minutes. It is necessary to work with a Strong Practitioner, certified to administer and interpret the results of the assessment. At least one 60-90 minute meeting with the practitioner is recommended for best results. 


The Strong Interest Inventory is a registered trademark of CPP, Inc.