The Development of a Computerized System for the Estimation of Reliability for Measurement Systems Employing Interval or Ratio Data.
D. Thomas Porter · 1977
Critical to precise quantitative,.research is reliability estimation. Researchers have:limited tools, however, to assess the reliability of evolving.instruments. Consequently, cursory asSessment is typical and in-depth evaluation is rare. 'This paper presents a rationale for_and_idescription of PIAS4._a_c.omputerized instrument analysis system. PIAS 'makes two major contributions to measurement theory and practice: (1) PIAS.is a collection of most of the routines necessary for such analyses.in one user-oriented package, and (2) PIAS provides unique output allowing the user to identify the most efficient combination of.items; the smallest number of items with the highest reliability. A utilization agreement and order form.for-PIAS-is-included. (Author/RC) *********************************************************************** * Documents acquired by ERIC include many informal unpublished * * materials not available from other sources. ERIC makes every effort * * to obtain the best copy available. Nevertheless, items'of marginal * * reproducibility are often encountered and this affects the quality * * of-the-microfiche and hardcopy-reproductions ERIC makes available * * via the ERIC Document Reproduction Service-(EDR4. EDRS is not * * responsible for the quality of the original document. Reproductions * * supplied by IDES are the:best that can be made from the original. * ***********************************************************************