D3. IRT Models questions
MULTILOG7 questions
Q1. Can you provide a sample MULTILOG7 syntax?
A1: MULTILOG7 syntax may look like this:
CALIBRATION OF AGREEABLENESS GRADED RESPONSE MODEL
>COMMENT
>PROBLEM RANDOM, INDIVIDUAL, NITEMS=10, NGROUPS=1, NEAMINEES=1500, NCHAR=4, DATA='AGR1_CAL.DAT';
>TEST ALL, GRADED, NC=(5,5,5,5,5,5,5,5,5,5);
>ESTIMATE NCYCLES=50;
>SAVE;
>END;
5
12345
1111111111
2222222222
3333333333
4444444444
5555555555
(4A1,10A1)
Q2. I am getting confused about Fortran format statement. Can you provide an example?
A2: The first chapter of IRT from SSI provided several examples of Fortran format statement. Here are some important format codes:
–"A" stands for alphanumeric, "F" stands for floating point, "I" stands for integer, "X" stands for skip one or more columns, "T" stands for the column position to tab to, "/" stands for go to the next line. Thus, (4A1) stands for 4 columns of alphanumeric characters of length one.