Many-Facet Rasch Measurement

Many-Facet Rasch Measurement

taught by Everett Smith

Aim of Course:

This online course, "Many-Facet Rasch Measurement" will cover the analysis and interpretation of judge-intermediated ratings, like essay grading, Olympic ice-skating, therapist ratings of patient behavior, etc. Specifically, you will learn how to assess whether raters function (as desired) interchangeably, or whether they differ systematically in ways that can impair the overall rating system.

This course may be taken individually (one-off) or as part of a certificate program.
Course Program:

WEEK 1: Software Operation and Basic Concepts

  • Software installation and operation
  • Facets, elements, persons, items, raters
  • Data entry methods, including using Excel
  • Rasch measurement concepts
  • Dichotomous and polytomous models
  • Rasch measures and measurement rulers

WEEK 2: Fit Analysis and Measurement Models

  • A two-facet dichotomous analysis
  • Observations, measures, expectations and residuals
  • Mean-square and standardized fit statistics
  • Outfit and Infit statistics
  • A three-facet polytomous analysis
  • Reliability, separation and inter-rater reliability
  • Rating scale structures

WEEK 3: Estimation and Interactions

  • A four-facet polytomous analysis
  • Missing data
  • Bias/interaction analysis
  • Graphing interactions with Excel
  • Recoding the data
  • Interactions with dummy facets

WEEK 4: Anchoring

  • Subset detection and remedies
  • Anchoring, linking and equating
  • Judging plan and Generalizability Theory
  • Prettifying output for communication


Homework in this course consists of short answer questions to test concepts.

In addition to assigned readings, this course also has supplemental readings available online and an end of course data modeling project.

Many-Facet Rasch Measurement

Who Should Take This Course:
Researchers and analysts in education, psychology, medicine and other fields who deal with data that include ratings from human judges.

Ability to manipulate an Excel spreadsheet is advantageous.

Organization of the Course:
Options for Credit and Recognition:
Course Text:
Instructional material will be provided online by the instructor. A reference work is Many-Facet Rasch Measurement (MESA Press, 1994) from
The course will use a time-limited version of Winsteps software available when the course starts. Microsoft Excel is used extensively. NOTE: Winsteps does not run on native Macintosh OS; you will need to be running Windows.


August 09, 2019 to September 06, 2019 August 07, 2020 to September 04, 2020

Many-Facet Rasch Measurement


August 09, 2019 to September 06, 2019 August 07, 2020 to September 04, 2020

Course Fee: $589

Do you meet course prerequisites? What about book & software? (Click here to learn more)

We have flexible policies to transfer to another course, or withdraw if necessary (modest fee applies)

Group rates: Click here to get information on group rates. 

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The Institute for Statistics Education is certified to operate by the State Council of Higher Education in Virginia (SCHEV).

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