Bi-polar psychological constructs, such as Jung's introversion- extraversion, can be expressed as measures on a unidimensional variable of "differential amount of". Multi-polar constructs are more of a challenge to report in an easily understood way.
According to Porter's (1973) Relationship Awareness Theory, there are three motivational patterns exhibited by team members. The assertive- directing pattern, symbolized by a lion, is exhibited by individuals who seek gratification through leading others. These individuals organize team resources, and expect to benefit from team success. The analytic-autonomizing pattern, symbolized by a fox, works towards logical order and meaning in action. These individuals focus on data collection and analysis. They expect to be paid for their work. The altruistic-nurturing pattern, symbolized by a St. Bernard dog, helps others with little interest in their own material advancement. When participating in a team, every team member exhibits more or less of all three patterns, but how much?
To investigate Porter's theory, I constructed a 15 item self- administered "team member inventory". Each item has a stem and three options, one for each pattern. For instance, one item is:
If someone were to describe what role you tend to play in a group,
would it be
a) fact-finding analyzer?
b) supportive hard-worker?
c) driven decision-maker?
The respondent chooses one option. The key for this item (unknown to the respondent) is a=(F)ox, b=St. (B)ernard, c=(L)ion. Each item is answered twice: once for a safe and secure team environment, and again for a dangerous, risky environment. The resulting data set consists of 30 data points per respondent, with each response coded L, F or B.
In order to understand what my respondents are telling me about themselves, I decompose the tri-polar theory into three bi-polar constructs. Each pair of patterns (animals) represents opposite ends of a latent variable on which each respondent can be located. Thus, to locate respondents on the Lion-Fox construct, any response coded "L" indicates more lion-ness. Any response coded "F" indicates more fox-ness, i.e., less lion-ness, and any response coded "B" is treated as missing data. Rasch analysis of the three bi-polar constructs yields three measures for each respondent: a Lion/Fox measure, a Fox/St. Bernard measure, and a St. Bernard/Lion measure.
A useful communication device for these three measures is an equilateral triangle. Each bipolar variable is rescaled and centered on one of the sides. In my examples, the vertices are 8 logits apart. The three Figures illustrate three actual profiles. Figure 1 depicts a typical respondent whose moderate behavior is somewhat lion-like. The measures are Fox/St.Bernard, 0.24 logits; Lion/Fox, 0.10; and St.Bernard/Lion, -0.60. To place these measures in the triangular diagram, each measure is located on its side, and a line perpendicular to the side is drawn from that point. The intersection of the lines forms a smaller equilateral triangle. The center of this triangle summarizes the respondent's tri-polar behavior.
Figure 2 shows a conspicuously St. Bernard-like profile. Figure 3 shows someone whose placement, while somewhat indefinite, avoids Lion- like behavior.
There is more information in the responses, but these Figures provide a quick initial summary and classification, informative to the team manager.
Lions, foxes and St. Bernards. Williams, Evelyn. Rasch Measurement Transactions, 1994, 8:2 p.351
Please help with Standard Dataset 4: Andrich Rating Scale Model
|Rasch Measurement Transactions (free, online)||Rasch Measurement research papers (free, online)||Probabilistic Models for Some Intelligence and Attainment Tests, Georg Rasch||Applying the Rasch Model 3rd. Ed., Bond & Fox||Best Test Design, Wright & Stone|
|Rating Scale Analysis, Wright & Masters||Introduction to Rasch Measurement, E. Smith & R. Smith||Introduction to Many-Facet Rasch Measurement, Thomas Eckes||Invariant Measurement: Using Rasch Models in the Social, Behavioral, and Health Sciences, George Engelhard, Jr.||Statistical Analyses for Language Testers, Rita Green|
|Rasch Models: Foundations, Recent Developments, and Applications, Fischer & Molenaar||Journal of Applied Measurement||Rasch models for measurement, David Andrich||Constructing Measures, Mark Wilson||Rasch Analysis in the Human Sciences, Boone, Stave, Yale|
|in Spanish:||Análisis de Rasch para todos, Agustín Tristán||Mediciones, Posicionamientos y Diagnósticos Competitivos, Juan Ramón Oreja Rodríguez|
|Forum||Rasch Measurement Forum to discuss any Rasch-related topic|
Go to Top of Page
Go to index of all Rasch Measurement Transactions
AERA members: Join the Rasch Measurement SIG and receive the printed version of RMT
Some back issues of RMT are available as bound volumes
Subscribe to Journal of Applied Measurement
Go to Institute for Objective Measurement Home Page. The Rasch Measurement SIG (AERA) thanks the Institute for Objective Measurement for inviting the publication of Rasch Measurement Transactions on the Institute's website, www.rasch.org.
|Coming Rasch-related Events|
|July 31 - Aug. 3, 2017, Mon.-Thurs.||Joint IMEKO TC1-TC7-TC13 Symposium 2017: Measurement Science challenges in Natural and Social Sciences, Rio de Janeiro, Brazil, imeko-tc7-rio.org.br|
|Aug. 7-9, 2017, Mon-Wed.||In-person workshop and research coloquium: Effect size of family and school indexes in writing competence using TERCE data (C. Pardo, A. Atorressi, Winsteps), Bariloche Argentina. Carlos Pardo, Universidad Catòlica de Colombia|
|Aug. 7-9, 2017, Mon-Wed.||PROMS 2017: Pacific Rim Objective Measurement Symposium, Sabah, Borneo, Malaysia, proms.promsociety.org/2017/|
|Aug. 10, 2017, Thurs.||In-person Winsteps Training Workshop (M. Linacre, Winsteps), Sydney, Australia. www.winsteps.com/sydneyws.htm|
|Aug. 11 - Sept. 8, 2017, Fri.-Fri.||On-line workshop: Many-Facet Rasch Measurement (E. Smith, Facets), www.statistics.com|
|Aug. 18-21, 2017, Fri.-Mon.||IACAT 2017: International Association for Computerized Adaptive Testing, Niigata, Japan, iacat.org|
|Sept. 15-16, 2017, Fri.-Sat.||IOMC 2017: International Outcome Measurement Conference, Chicago, jampress.org/iomc2017.htm|
|Oct. 13 - Nov. 10, 2017, Fri.-Fri.||On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com|
|Oct. 25-27, 2017, Wed.-Fri.||In-person workshop: Applying the Rasch Model hands-on introductory workshop, Melbourne, Australia (T. Bond, B&FSteps), Announcement|
|Jan. 5 - Feb. 2, 2018, Fri.-Fri.||On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com|
|Jan. 10-16, 2018, Wed.-Tues.||In-person workshop: Advanced Course in Rasch Measurement Theory and the application of RUMM2030, Perth, Australia (D. Andrich), Announcement|
|Jan. 17-19, 2018, Wed.-Fri.||Rasch Conference: Seventh International Conference on Probabilistic Models for Measurement, Matilda Bay Club, Perth, Australia, Website|
|April 13-17, 2018, Fri.-Tues.||AERA, New York, NY, www.aera.net|
|May 25 - June 22, 2018, Fri.-Fri.||On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com|
|June 29 - July 27, 2018, Fri.-Fri.||On-line workshop: Practical Rasch Measurement - Further Topics (E. Smith, Winsteps), www.statistics.com|
|Aug. 10 - Sept. 7, 2018, Fri.-Fri.||On-line workshop: Many-Facet Rasch Measurement (E. Smith, Facets), www.statistics.com|
|Oct. 12 - Nov. 9, 2018, Fri.-Fri.||On-line workshop: Practical Rasch Measurement - Core Topics (E. Smith, Winsteps), www.statistics.com|
|The HTML to add "Coming Rasch-related Events" to your webpage is:|
The URL of this page is www.rasch.org/rmt/rmt82b.htm