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\XCALIBRE\XCALWIN\AHORASI.TXT Date:  Time: 11,36 ******************** ANALYSIS SUMMARY INFORMATION ******************** Data (Input) File: C:\WINDOWS\ESCRIT~1\XCALIBRE\XCALWIN\AHORASI.TXT Analysis Output File: C:\WINDOWS\ESCRIT~1\XCALIBRE\XCALWIN\AHORASI.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\XCALIBRE\XCALWIN\AHORASI.TXT Date: tk dpT Time: 11,36 The input was from file: C:\WINDOWS\ESCRIT~1\XCALIBRE\XCALWIN\AHORASI.TXT The number of items was: 6 There was no item linkage The key was: 222222 The numbers of alternatives were: 222222 The inclusion specifications were: YYYYYY The maximum parameter change on loop 1 was 1.363 The maximum parameter change on loop 2 was 0.124 The maximum parameter change on loop 3 was 0.115 The maximum parameter change on loop 4 was 0.094 The maximum parameter change on loop 5 was 0.044 Mean Number-Correct Score = 4.789 Number-Correct Standard Deviation = 1.468 K-R 21 Reliability = 0.680 The number of examinees was 3631 Final Parameter Summary Information: Mean SD Theta 0.00 1.00 a 0.98 0.30 b -1.47 0.40 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\XCALIBRE\XCALWIN\AHORASI.TXT Date: &Ѐ~ Time: 11,37 FINAL ITEM PARAMETER ESTIMATES Item Lnk Flg a b c Resid PC PBs PBt N Item name ---- --- --- ----- ----- ----- ----- ----- ----- ----- ------ --------- 1 0.97 -2.14 0.00 0.54 0.90 0.55 0.52 3631 2 1.35 -1.31 0.00 0.55 0.81 0.70 0.73 3631 3 1.09 -1.35 0.00 0.95 0.80 0.67 0.67 3631 4 1.29 -1.37 0.00 0.49 0.82 0.69 0.71 3631 5 0.62 -1.80 0.00 0.87 0.81 0.55 0.49 3631 6 0.57 -0.86 0.00 1.28 0.65 0.58 0.53 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\XCALIBRE\XCALWIN\AHORASI.TXT Date: &11,37 Time: 11,37 ITEM PARAMETER ESTIMATES W/STANDARD ERRORS a b c Item Lnk Flg a error b error c error Resid Item name ---- --- --- ----- ----- ----- ----- ----- ----- ----- --------- 1 0.97 0.033 -2.14 0.043 0.00 N/A 0.54 2 1.35 0.034 -1.31 0.027 0.00 N/A 0.55 3 1.09 0.032 -1.35 0.031 0.00 N/A 0.95 4 1.29 0.034 -1.37 0.028 0.00 N/A 0.49 5 0.62 0.029 -1.80 0.046 0.00 N/A 0.87 6 0.57 0.034 -0.86 0.040 0.00 N/A 1.28 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\XCALIBRE\XCALWIN\AHORASI.TXT Date: &11,37 Time: 11,37 ITEM ANALYSIS Endorsement Rate Item-Theta Corr. Item 1 2 Oth 1 2 Oth ---- --- --- --- --- --- --- 1 10 90~ -51 52~ -3 2 19 81~ -73 73~ -4 3 19 80~ 1 -67 67~ -6 4 18 82~ -71 71~ -5 5 19 81~ -49 49~ -2 6 35 65~ -53 53~ -3 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\XCALIBRE\XCALWIN\AHORASI.TXT Date: IT~1\XCALIBRE\XCALWIN\AHORASI.OUT Time: 11,37 Test characteristics: K-R 21 Expected Average Reliability Information Information 0.680 1.587 1.505 Test Information Curve 8.0 I I I I I I I I I I 6.0 I I I I I I n I f I o I r I * m I ** ** a 4.0 I * * t I * * i I * o I * n I * * I * I * * I * I * I * * 2.0 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\XCALIBRE\XCALWIN\AHORASI.TXT Date: ,37 Time: 11,37 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: 32 seconds