Resources for congruence coefficient estimates
The basic program to calculate congruence coefficients is
here. Note
that Matlab with the Statistical toolbox is needed to run the program.
To modify the program for your data:
- enter number of subjects (N)
- enter number of questions per factor (kys); must be even
- set "minusOne" equal to -1 if there are inverted items, and 1 if there
are no inverted items
- set fStr equal to "sqrt(s2n)", where s2n is the signal-to-noise ratio of the data;
this data can also be set individually for each factor
- on line 44, replace 20 by the number of runs.
Note:
- only five factors are supported
- congruence is pooled over factors
- the output is [s2n, var.expl., median, 95%-point, 99%-point]
Author's homepage.