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\ENERGIA.TXT Date:  Time: 12,53 ******************** ANALYSIS SUMMARY INFORMATION ******************** Data (Input) File: C:\WINDOWS\ESCRIT~1\XCALWIN\ENERGIA.TXT Analysis Output File: C:\WINDOWS\ESCRIT~1\XCALWIN\ENERGIA.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\ENERGIA.TXT Date: ë Time: 12,53 The input was from file: C:\WINDOWS\ESCRIT~1\XCALWIN\ENERGIA.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 1.493 The maximum parameter change on loop 2 was 0.234 The maximum parameter change on loop 3 was 0.234 The maximum parameter change on loop 4 was 0.156 The maximum parameter change on loop 5 was 0.095 The maximum parameter change on loop 6 was 0.082 The maximum parameter change on loop 7 was 0.044 Mean Number-Correct Score = 3.717 Number-Correct Standard Deviation = 1.057 K-R 21 Reliability = 0.345 The number of examinees was 3631 Final Parameter Summary Information: Mean SD Theta 0.00 1.00 a 0.56 0.22 b -1.45 1.34 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\ENERGIA.TXT Date: & €Ð€Ð~ Time: 12,53 FINAL ITEM PARAMETER ESTIMATES Item Lnk Flg a b c Resid PC PBs PBt N Item name ---- --- --- ----- ----- ----- ----- ----- ----- ----- ------ --------- 1 0.47 -2.47 0.00 0.49 0.83 0.55 0.50 3631 2 0.84 -2.05 0.00 0.46 0.86 0.56 0.68 3631 3 0.61 -1.27 0.00 0.80 0.71 0.60 0.69 3631 4 0.68 -2.54 0.00 0.40 0.89 0.52 0.57 3631 5 RP 0.20 1.08 0.00 2.48 0.42 0.45 0.16 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\ENERGIA.TXT Date: & 12,53 Time: 12,53 ITEM PARAMETER ESTIMATES W/STANDARD ERRORS a b c Item Lnk Flg a error b error c error Resid Item name ---- --- --- ----- ----- ----- ----- ----- ----- ----- --------- 1 0.47 0.028 -2.47 0.062 0.00 N/A 0.49 2 0.84 0.030 -2.05 0.044 0.00 N/A 0.46 3 0.61 0.031 -1.27 0.041 0.00 N/A 0.80 4 0.68 0.029 -2.54 0.056 0.00 N/A 0.40 5 RP 0.20 0.073 1.08 0.100 0.00 N/A 2.48 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\ENERGIA.TXT Date: & 12,53 Time: 12,53 ITEM ANALYSIS Endorsement Rate Item-Theta Corr. Item 1 2 Oth 1 2 Oth ---- --- --- --- --- --- --- 1 17 83~ -50 50~ -3 2 14 86~ -68 68~ -6 3 28 71~ -69 69~ -4 4 11 89~ -57 57~ -7 5 57 42~ -16 16~ -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\ENERGIA.TXT Date: IT~1\XCALWIN\ENERGIA.OUT Time: 12,53 Test characteristics: K-R 21 Expected Average Reliability Information Information 0.345 0.510 0.561 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\ENERGIA.TXT Date: ,53 Time: 12,53 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: 34 seconds