Single-Facet Designs

  • Robert L. Brennan
Chapter
Part of the Statistics for Social Sciences and Public Policy book series (SSBS)

Abstract

Throughout this chapter it is assumed that the universe of admissible observations and the universe of generalization involve conditions from the same single facet, usually referred to as an item facet. Also, it is usually assumed that the population consists of persons. For a single-faceted universe, there are two designs that might be employed in a G study: the p × i or the i:p design, where the letter p is used to index persons (or examinees), i indexes items, “×” is read “crossed with,” and “:” is read “nested within.” For the p × i design, each person is administered the same random sample of items. For the i:p design, each person is administered a different random sample of items. Similarly, there are two possible D study designs: p × I and I:p, where uppercase I is used to emphasize that D study considerations involve mean scores over sets of items.

Keywords

Variance Component Error Variance Synthetic Data Venn Diagram Parallel Form 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • Robert L. Brennan
    • 1
  1. 1.Iowa Testing ProgramsUniversity of IowaIowa CityUSA

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