386 BILOG 3.07 MAXIMUM LIKELIHOOD ITEM ANALYSIS AND TEST SCORING: LOGISTIC MODEL DISTRIBUTED BY SCIENTIFIC SOFTWARE, INC. 1525 E. 53RD STREET CHICAGO, ILINOIS 60615 (800) 247-6113, (312) 684-4979 PROGRAM COPYRIGHT HELD BY SCIENTIFIC SOFTWARE, INC. 1985-93 ALL RIGHTS RESERVED. 1 *** LOGISTIC MODEL ITEM ANALYSER *** *** PHASE 1 *** CONSCIENTIOUSNESS CALIBRATION FOR IRT TUTORIAL. >COMMENT >GLOBAL DFN='CON2_CAL.DAT', NIDW=4, NPARM=3, OFNAME='OMIT.KEY', SAVE; GLOBAL PARAMETERS ================= NUMBER OF SUBTESTS 1 CASE WEIGHTING NONE EMPLOYED ITEM RESPONSE MODEL 3 PARAMETER LOGISTIC NORMAL METRIC (I.E., D = 1.7) >SAVE SCO = 'CON2_CAL.SCO', PARM = 'CON2_CAL.PAR'; >LENGTH NITEMS=(10); SUBTEST LENGTHS: 10 >INPUT SAMPLE=99999; DATA INPUT SPECIFICATIONS ========================= NUMBER OF FORMAT CARDS 1 NUMBER OF ITEMS IN INPUT STREAM 10 NUMBER OF RESPONSE ALTERNATIVES 5 NUMBER OF SUBJECT ID CHARACTERS 4 SUBJECT DATA INPUT OPTION SINGLE-SUBJECT DATA, NO CASE WEIGHTS MAXIMUM SAMPLE SIZE FOR ITEM CALIBRATION 99999 ALL SUBJECTS INCLUDED IN RUN FORMAT CARD FOR INPUT IS (4A1,10A1) FILE ASSIGNMENT AND DISPOSITION =============================== [INPUT FILES] SUBJECT DATA INPUT FILE CON2_CAL.DAT SINGLE-SUBJECT DATA, NO CASE WEIGHTS OMITTED-RESPONSE KEY FILE OMIT.KEY [OUTPUT FILES] ITEM PARAMETERS FILE CON2_CAL.PAR SUBJECT SCALE-SCORE FILE CON2_CAL.SCO [SCRATCH FILES] BILOG SYSTEM BINARY DATA FILE con2_cal.MFL CALIBRATION BINARY DATA FILE con2_cal.CFL ESTIMATED COVARIANCE FILE con2_cal.VFL TEMPORARY FILE con2_cal.T02 TEMPORARY FILE con2_cal.T03 TEMPORARY FILE con2_cal.T14 TEMPORARY FILE con2_cal.T99 >TEST TNAME=CON; OMIT KEY: 1 CON OBSERVATION 1 WEIGHT: 1.0000 ID : 1001 SUBTEST 1 CON TRIED RIGHT 10.000 3.000 ITEM 1 2 3 4 5 6 7 8 9 10 TRIED 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 RIGHT 0.0 0.0 0.0 0.0 1.0 1.0 0.0 1.0 0.0 0.0 OBSERVATION 2 WEIGHT: 1.0000 ID : 1003 SUBTEST 1 CON TRIED RIGHT 10.000 5.000 ITEM 1 2 3 4 5 6 7 8 9 10 TRIED 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 RIGHT 1.0 1.0 0.0 0.0 0.0 0.0 0.0 1.0 1.0 1.0 1500 OBSERVATIONS READ FROM FILE: CON2_CAL.DAT 1500 OBSERVATIONS WRITTEN TO FILE: con2_cal.MFL 1 CLASSICAL ITEM STATISTICS FOR SUBTEST CON NUMBER NUMBER ITEM*TEST CORRELATION ITEM NAME TRIED RIGHT PERCENT LOGIT/1.7 PEARSON BISERIAL --------------------------------------------------------------------- 1 0001 1500.0 756.0 0.504 0.01 0.480 0.602 2 0002 1500.0 1014.0 0.676 0.43 0.521 0.679 3 0003 1500.0 957.0 0.638 0.33 0.407 0.522 4 0004 1500.0 942.0 0.628 0.31 0.404 0.517 5 0005 1500.0 653.0 0.435 -0.15 0.452 0.569 6 0006 1500.0 732.0 0.488 -0.03 0.410 0.514 7 0007 1500.0 628.0 0.419 -0.19 0.465 0.588 8 0008 1500.0 957.0 0.638 0.33 0.390 0.499 9 0009 1500.0 688.0 0.459 -0.10 0.575 0.722 10 0010 1500.0 887.0 0.591 0.22 0.464 0.587 --------------------------------------------------------------------- 1644 BYTES OF NUMERIAL WORKSPACE USED OUT OF 3600000 IN PHASE-1 960 BYTES OF CHARACTER WORKSPACE USED OUT OF 80000 IN PHASE-1