Maps for Diagnosis and Prediction

  <more vision>|<more difficult>
100          s +
               |
               |
               |
               |
90             +
               |
               |
               |
               |
               |
80           s +
               |
               |
           f s |
             s |
       s s s s |
70       f s s +
               |
               | read signs at night
       f s s s | oncoming headlights
   s s s s s s |
             s | night driving       see faces
60             +
             f | medicine bottles  thread needle
             f |
       f f s s |
               | moving objects & night driving
           f f | teletext
50         f f +
             s | drive unfamiliar areas
             s | read food cans
               |
               | newspapers  read signs daytime
             f |
40           f +
               |
             f |
               | daytime driving
             f | television
             f |
30         f s +
               |
               | write checks
               |
               |
               |
20             +
               |
               |
               |
               |
             f |
10             +
  <less vision>|<less difficult>

The "bilateral cataract" patients are waiting for first (f) or second (s) eye cataract surgery. The line at 60 units roughly divides "f" from "s" patients. It indicates an expected vision level after first surgery. Vision may be good enough for day-time driving, but not for night-time.

Pesudovs K., Garamendi E., Keeves J.P., & Elliott D.B. (2003) The Activities of Daily Vision Scale for cataract surgery outcomes: Re-evaluating validity with Rasch analysis. Investigative Ophthalmology & Visual Science, 44, 7, 2892-2899.

Maps for Diagnosis and Prediction, Pesudovs K., Garamendi E., Keeves J.P., & Elliott D.B. … Rasch Measurement Transactions, 2003, 17:3 p.935




Rasch Publications
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

To be emailed about new material on www.rasch.org
please enter your email address here:

I want to Subscribe: & click below
I want to Unsubscribe: & click below

Please set your SPAM filter to accept emails from Rasch.org

www.rasch.org welcomes your comments:

Your email address (if you want us to reply):

 

ForumRasch 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
June 23 - July 21, 2023, Fri.-Fri. On-line workshop: Practical Rasch Measurement - Further Topics (E. Smith, Winsteps), www.statistics.com
Aug. 11 - Sept. 8, 2023, Fri.-Fri. On-line workshop: Many-Facet Rasch Measurement (E. Smith, Facets), www.statistics.com

 

The URL of this page is www.rasch.org/rmt/rmt173d.htm

Website: www.rasch.org/rmt/contents.htm