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Strong Interest Inventory

  1. Jo-Ida C. Hansen

Published Online: 30 JAN 2010

DOI: 10.1002/9780470479216.corpsy0950

Corsini Encyclopedia of Psychology

Corsini Encyclopedia of Psychology

How to Cite

Hansen, J.-I. C. 2010. Strong Interest Inventory. Corsini Encyclopedia of Psychology. 1–2.

Author Information

  1. University of Minnesota

Publication History

  1. Published Online: 30 JAN 2010


The first edition of the Strong Interest Inventory (SII) was published in 1927 by E. K. Strong Jr. The SII has evolved over the decades with periodic revisions that have expanded the information provided for test takers, addressed issues of sex and cultural fairness, updated the item pool to reflect occupational and societal changes, and provided enhanced interpretive information. One constant throughout the history of the SII is the careful attention that has been paid to providing evidence of validity, as well as evidence of reliability, for the instrument's scale scores. Another constant has been the widespread use of the SII with adult and young populations. In contrast to the first edition of the SII that featured 18 Occupational scales, the profile of the current edition (Consulting Psychological Press, 2004) provides scores on 244 Occupational scales, 30 Basic Interest scales, 6 General Occupational Themes, and 5 Personal Style scales. Test takers respond to 291 items and are asked to indicate the extent to which they strongly like, like, are indifferent to, dislike, or strongly dislike various kinds of jobs, subjects, work and leisure activities, and people. The reading level for the SII is about the ninth grade, and the instrument takes about 30 minutes to complete.


  • strong interest inventory;
  • interest measurement;
  • Holland's theory of vocational types;
  • occupational choice