SCALO - SCALOGRAM ANALYSIS, Ver. 3.1
                                By Andrew Gilpin
                             Modified By Ron D. Hays

            Distributed by the National Collegiate Software Clearinghouse

                 Number of Stimuli  =     9

                 Number of Subjects =  2829

                    Data from FILE 'gutt.DAT'
 
                  SUMMARY

          Items in Original order:

          Item #      #Passing      Difficulty
          ======       =======      ==========

            1           998           0.35
            2          1548           0.55
            3          1377           0.49
            4          2038           0.72
            5          2382           0.84
            6          2131           0.75
            7          2023           0.72
            8          2384           0.84
            9          2581           0.91

          Items arranged by difficulty:

          Item #      #Passing      Difficulty
          ======       =======      ==========

            9          2581           0.91
            8          2384           0.84
            5          2382           0.84
            6          2131           0.75
            4          2038           0.72
            7          2023           0.72
            2          1548           0.55
            3          1377           0.49
            1           998           0.35

                    Summary Reliability Statistics:

                    Split-Half (Odd-Even) Reliability:

                    Original:            R = 0.858

                    Estimated(SP-BRN)    R = 0.924

                    Guttman Reliability  R = 0.922

                    Kuder-Richardson 20  R = 0.893
 
----------------------------------------------------------------
        Coefficient of Reproducibility     = 0.929

        Minimum Marginal Reproducibility   = 0.721

        Percent Improvement                = 0.208

        Coefficient of Scalability         = 0.747

Proportion with Perfect Guttman Pattern    = 0.719