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;

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.

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