Strong Interest Inventory

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The Strong Interest Inventory (SII) is an interest inventory used in career assessment. [1] [2] As such, career assessments may be used in career counseling. [2] [3] [4] [5] [6] [7] The goal of this assessment is to give insight into a person's interests, so that they may have less difficulty in deciding on an appropriate career choice for themselves. [2] [7] It is also frequently used for educational guidance [5] [6] as one of the most popular career assessment tools. The test was developed in 1927 by psychologist Edward Kellog Strong, Jr. to help people exiting the military find suitable jobs. [8] It was revised later by Jo-Ida Hansen and David P. Campbell. The modern version of 2004 is based on the Holland Codes typology of psychologist John L. Holland. [8] The Strong is designed for high school students, college students, and adults, and was found to be at about the ninth-grade reading level. [9]

Contents

Background and history

Before he created the inventory, Strong was the head of the Bureau of Educational Research at the Carnegie Institute of Technology. Strong attended a seminar at the Carnegie Institute of Technology where a man by the name of Clarence S. Yoakum introduced the use of questionnaires in differentiating between people of various occupations. This later sparked Strong's interest in developing a better way of measuring people's occupational interests. [8] Starting off as the "Strong Vocational Interest Blank", the name changed when the test was revised in 1974 to the Strong-Campbell Interest Inventory and later to the Strong Interest Inventory. [8] [10] The inventory has been revised six times over the years to reflect continued development in the field. [8]

Strong based his empirical approach on the idea that interests were on a dimension of liking to disliking that could be used to discriminate among various occupational groups. [8] In other words, Strong developed several scales that contrasted groups of people, based on their answers. This method of scaling, developed by Strong, has been very influential and has been used in several different questionnaires, including the Minnesota Multiphasic Personality Inventory (MMPI). [8]

Strong's original Inventory had 10 occupational scales. The original Inventory was created with men in mind, so in 1933 Strong came out with a women's form of the Strong Vocational Blank. In 1974 when the Strong-Campbell Interest Inventory came out, Campbell had combined both the men's and the women's forms into a single form. Other improvements that Campbell made to earlier versions include: the use of 124 occupational scales, the continued use of 23 Basic Interest Scales, and the addition of 2 special scales to measure academic comfort and introversion/extroversion dimensions. [8]

The Strong Interest Inventory is high in both predictive and concurrent validity. [8]

Components

The newly revised inventory consists of 291 items that measure an individual's interest in six areas: [9]

AreaNumber of Questions in Each Area
Occupations
107
Subject Areas
46
Activities
85
Leisure Activities
28
People
16
Your Characteristics
9

The first 282 items are answered by the examinee choosing one of the following options: "strongly like", "like", "indifferent", "dislike", or "strongly dislike" while the remaining 9 items in the "Your Characteristics" section are answered the same way but with different options including: "strongly like me", "like me", "don't know", "unlike me", or "strongly unlike me". [9] It is an assessment of interests, and not to be confused with personality assessments or aptitude test.

Scoring

The newly revised version of this test can typically be taken in 30–45 minutes after which the results must be scored by computer. After scoring, an individual can then view how their personal interests compare with the interests of people in a specific career field. Access to the comparison database and interpretation of the results usually incurs a fee.

Strong Interest Inventory is a registered trademark of The Myers-Briggs Company, or CPP, Inc. of Mountain View, California. [10]

The results include:

Interpretation

When an individual takes and completes the assessment, the resulting data is reflected by scores in each of the six General Occupational Themes (GOTs) or interest areas, including Realistic, Investigative, Artistic, Social, Enterprising, and Conventional (RIASEC). [2] [10] Typically, a Theme Code that reflects the top three RIASEC interest areas is reported. [10] For some individuals, however, only one or two RIASEC interest areas may be reported, this being the case if their scores in the five remaining interest areas are not considered high enough or significant enough to be identified as major interest areas. [10]

The RIASEC GOT interest area results for any particular individual can be correlated or not correlated, differentiated or undifferentiated. [11] [12] As an example, in his 1998 case study of Ms. Flood, Jeffrey R. Prince reported in the Career Development Quarterly, 46, "Environments that are purely Artistic usually reflect values of independence and self-expression through loosely structured activities, whereas Enterprising environments frequently include organizational structures that value status." [2] Ms. Flood's RIASEC results reflected that her main GOT occupational theme code was AE, with S as a possible third theme code, but at a lower intensity. [2] In this case, and according to Holland's RIASEC Hexagon, [10] these theme codes may not be entirely congruent, correlated, or undifferentiated with Ms. Flood's interests. Theme codes that fall closer in proximity to each other on Holland's RIASEC hexagon are those that generally reflect greater congruence, correlation, and undifferentiation. [10] Therefore, Ms. Flood may experience some psychological challenges [12] in trying to integrate her interests related the Artistic and Enterprising theme codes into her work because those interest areas are not considered to be highly correlated. [2] Ms. Flood would benefit from working in careers and occupations that support her main GOTs of Artistic and Enterprising, with some Social component. [2]

Reception

Jan Case from Louisiana State University Health Sciences Center and Terry L. Blackwell from Montana State University-Billings did a study in 2008, published in Rehabilitation Counseling Bulletin, 51. It came to favorable conclusions about the inventory: [9]

The Strong Interest Inventory's qualitative features (including the design of the test booklets, quality and clarity of its contents, durability, appropriateness for the test-takers, and supportive interpretation materials) and its psychometric characteristics continue to distinguish this instrument as a standard of excellence...the Strong continues to set the standard for vocational interest inventories. It has proven reliability and validity properties. Furthermore, the developers have continued to strive for improvements and innovations in this inventory. Career counselors, psychologists, and others using the Strong will find they have an instrument that is methodologically sophisticated and that will provide clients with much information to ponder along with the resources with which make reasoned career decisions.

Many of the jobs that the Strong Interest Inventory predicted did not exist prior to the latest version. Because of this fact, the test is constantly being updated as new jobs are created and technology advances.

See also

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References

  1. ↑ Staggs, G.D. (2004). Meta-analyses of interest-personality convergence using the Strong Interest Inventory and the Multidimensional Personality Questionnaire. (Order No. 3145683, Iowa State University). ProQuest Dissertations and Theses, pp. 1-24.
  2. 1 2 3 4 5 6 7 8 9 Prince, J.R. (June 1998). "Interpreting the Strong Interest Inventory: A case study". The Career Development Quarterly. 46 (4): 339–346. doi:10.1002/j.2161-0045.1998.tb00708.x.
  3. ↑ Harmon, L.W., Hansen, J.C., Borgen, F.H., & Hammer, A.L. (1994) Strong Interest Inventory applications and technical guide. Palo Alto, CA: Consulting Psychologists Press.
  4. ↑ Prince, J.P. (1995). Strong Interest Inventory resource: Strategies for group and individual interpretations in college settings. Palo Alto, CA: Consulting Psychologists Press.
  5. 1 2 Day, M.A., & Luzzo, D.A. (1997). Effects of Strong Interest Inventory feedback on career beliefs, pp. 1-13. Paper presented at the Annual Meeting of the American Psychological Association, Chicago, Illinois.
  6. 1 2 Effects of Strong Interest Inventory feedback on career beliefs, ERIC.ED.gov, 1997, Day, M.A., & Luzzo, D.A., Retrieved 17 June 2014.
  7. 1 2 Katz, L.; Joyner, J.W.; Seaman, N. (July 1999). "Effects of joint interpretation of the Strong Interest Inventory and the Myers-Briggs Type Indicator in career choice". Journal of Career Assessment. 7 (3): 281–298. doi:10.1177/106907279900700306. S2CID   143992276.
  8. 1 2 3 4 5 6 7 8 9 Donnay, D.A.C. (September 1997). "E.K. Strong's legacy and beyond: 70 years of the Strong Interest Inventory". The Career Development Quarterly. 46 (1): 2–22. doi:10.1002/j.2161-0045.1997.tb00688.x.
  9. 1 2 3 4 Blackwell, T.; Case, J. (January 2008). "Test Review - Strong Interest Inventory, Revised Edition". Rehabilitation Counseling Bulletin. 51 (2): 122–126. doi:10.1177/0034355207311350.
  10. 1 2 3 4 5 6 7 8 Strong Interest Inventory, CPP.com, Menlo Park, CA: CPP, Inc., 2014, Retrieved 16 June 2014.
  11. ↑ Einarsdottir, S. (2001). Structural equivalence of vocational interests across culture and gender: Differential item functioning in the Strong Interest Inventory. (Order No. 3023048, University of Illinois at Urbana-Champaign). ProQuest Dissertations and Theses, pp. 1-201.
  12. 1 2 Lowder, M.A. (2005). The impact of psychological distress on career decision-making: Examining the relationship between the Strong Interest Inventory and psychological distress. (Order No. 3200331, University of Kentucky). ProQuest Dissertations and Theses, pp. 1-133.
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