XCALIBRE (tm) for Windows -- Version 1.00 Page 1 Copyright (c) 1995 by Assessment Systems Corporation, All Rights Reserved Marginal Maximum-Likelihood IRT Parameter Estimation Program XCALIBRE Analysis from Data File: C:\WINDOWS\ESCRIT~1\XCALWIN\APERTMEN.TXT Date:  Time: 13,11 ******************** ANALYSIS SUMMARY INFORMATION ******************** Data (Input) File: C:\WINDOWS\ESCRIT~1\XCALWIN\APERTMEN.TXT Analysis Output File: C:\WINDOWS\ESCRIT~1\XCALWIN\APERTMEN.OUT Score Output File: NONE Item Name File: NONE Statistics Output File: NONE ***** CONFIGURATION INFORMATION ***** Item Parameter Priors: COMMON Allow Priors to Float: YES IRT Model Used: 2-parameter Maximum Number of Loops: 12 Starting Prior Distribution Moments: Mean SD a 0.7500 0.1200 b 0.0000 1.0000 c 0.0000 0.0000 NOTE: *** will be printed when the c standard error value > 0.10 XCALIBRE (tm) for Windows -- Version 1.00 Page 2 Copyright (c) 1995 by Assessment Systems Corporation, All Rights Reserved Marginal Maximum-Likelihood IRT Parameter Estimation Program XCALIBRE Analysis from Data File: C:\WINDOWS\ESCRIT~1\XCALWIN\APERTMEN.TXT Date: ë Time: 13,11 The input was from file: C:\WINDOWS\ESCRIT~1\XCALWIN\APERTMEN.TXT The number of items was: 5 There was no item linkage The key was: 22222 The numbers of alternatives were: 22222 The inclusion specifications were: YYYYY The maximum parameter change on loop 1 was 1.412 The maximum parameter change on loop 2 was 0.168 The maximum parameter change on loop 3 was 0.158 The maximum parameter change on loop 4 was 0.097 The maximum parameter change on loop 5 was 0.079 The maximum parameter change on loop 6 was 0.042 Mean Number-Correct Score = 3.634 Number-Correct Standard Deviation = 1.192 K-R 21 Reliability = 0.451 The number of examinees was 3631 Final Parameter Summary Information: Mean SD Theta 0.00 1.00 a 0.58 0.17 b -1.44 0.89 c 0.00 0.00 XCALIBRE (tm) for Windows -- Version 1.00 Page 3 Copyright (c) 1995 by Assessment Systems Corporation, All Rights Reserved Marginal Maximum-Likelihood IRT Parameter Estimation Program XCALIBRE Analysis from Data File: C:\WINDOWS\ESCRIT~1\XCALWIN\APERTMEN.TXT Date: & €Ð€Ð~ Time: 13,12 FINAL ITEM PARAMETER ESTIMATES Item Lnk Flg a b c Resid PC PBs PBt N Item name ---- --- --- ----- ----- ----- ----- ----- ----- ----- ------ --------- 1 0.79 -1.75 0.00 0.59 0.82 0.58 0.66 3631 2 0.77 -1.69 0.00 0.71 0.81 0.59 0.66 3631 3 0.51 -0.64 0.00 1.16 0.60 0.61 0.59 3631 4 0.37 -0.31 0.00 1.31 0.54 0.56 0.45 3631 5 0.45 -2.81 0.00 0.52 0.86 0.47 0.42 3631 XCALIBRE (tm) for Windows -- Version 1.00 Page 4 Copyright (c) 1995 by Assessment Systems Corporation, All Rights Reserved Marginal Maximum-Likelihood IRT Parameter Estimation Program XCALIBRE Analysis from Data File: C:\WINDOWS\ESCRIT~1\XCALWIN\APERTMEN.TXT Date: & 13,12 Time: 13,12 ITEM PARAMETER ESTIMATES W/STANDARD ERRORS a b c Item Lnk Flg a error b error c error Resid Item name ---- --- --- ----- ----- ----- ----- ----- ----- ----- --------- 1 0.79 0.030 -1.75 0.040 0.00 N/A 0.59 2 0.77 0.029 -1.69 0.040 0.00 N/A 0.71 3 0.51 0.040 -0.64 0.043 0.00 N/A 1.16 4 0.37 0.056 -0.31 0.055 0.00 N/A 1.31 5 0.45 0.027 -2.81 0.068 0.00 N/A 0.52 XCALIBRE (tm) for Windows -- Version 1.00 Page 5 Copyright (c) 1995 by Assessment Systems Corporation, All Rights Reserved Marginal Maximum-Likelihood IRT Parameter Estimation Program XCALIBRE Analysis from Data File: C:\WINDOWS\ESCRIT~1\XCALWIN\APERTMEN.TXT Date: & 13,12 Time: 13,12 ITEM ANALYSIS Endorsement Rate Item-Theta Corr. Item 1 2 Oth 1 2 Oth ---- --- --- --- --- --- --- 1 17 82~ -65 66~ -5 2 19 81~ -65 66~ -7 3 39 60~ 1 -59 59~ -5 4 46 54~ -45 45~ -3 5 14 86~ -42 42~ -2 XCALIBRE (tm) for Windows -- Version 1.00 Page 6 Copyright (c) 1995 by Assessment Systems Corporation, All Rights Reserved Marginal Maximum-Likelihood IRT Parameter Estimation Program XCALIBRE Analysis from Data File: C:\WINDOWS\ESCRIT~1\XCALWIN\APERTMEN.TXT Date: IT~1\XCALWIN\APERTMEN.OUT Time: 13,12 Test characteristics: K-R 21 Expected Average Reliability Information Information 0.451 0.666 0.637 Test Information Curve 4.0 I I I I I I I I I I 3.0 I I I I I I n I f I o I r I m I a 2.0 I t I i I o I n I I I I I ********** I ** ** 1.0 I ** ** I ** ** I ** *** I * ** I ** I *** I **** I ***** I ******** I ********* I--------------------------------------------------------------- -3.0 -2.0 -1.0 0.0 1.0 2.0 3.0 ability XCALIBRE (tm) for Windows -- Version 1.00 Page 7 Copyright (c) 1995 by Assessment Systems Corporation, All Rights Reserved Marginal Maximum-Likelihood IRT Parameter Estimation Program XCALIBRE Analysis from Data File: C:\WINDOWS\ESCRIT~1\XCALWIN\APERTMEN.TXT Date: ,12 Time: 13,12 Test Characteristic Curve 1.00 I I ** I ******** I ***** I **** E I **** s I ** t I *** i I ** m I ** a 0.75 I * t I ** e I ** d I * I * P I * r I ** o I * p I * o I * r 0.50 I * t I * i I * o I ** n I * I * C I * o I * r I ** r I * e 0.25 I ** c I * t I * I I I I I I I I--------------------------------------------------------------- -3.0 -2.0 -1.0 0.0 1.0 2.0 3.0 ability Elapsed Time: 30 seconds