|
|
A new extension command, STATS_EXRASCH,
has been posted to the SPSS Community site (www.ibm.com/developerworks/spssdevcentral)
in the Extension Commands Collection. It estimates standard dichotomous
Rasch, linear logistic test, rating scale, linear rating scale, partial
credit, and linear partial credit models. The output includes extensive
tables, plots, and test statistics. It requires the R Essentials,
which are also available from the Community site. The procedure has
been tested mainly with Statistics 21, but it is expected to work with
versions back to 18.
I would like to thank Ryan Black for
his generous advice and review of the preliminary version of this procedure,
which has resulted in a substantial increase in its quality. He is,
of course, not responsible for any defects that might remain.
Note: Since the recent IBM developerWorks
upgrade we have received some reports of malfunctioning links. The
dW team has traced this to a bug in Internet Explorer 8 which results in
misinterpretation of some URLs used on the site. If you encounter
this problem, switching to Firefox or another browser should solve it.
The team is working on a solution.
Jon Peck (no "h") aka Kim
Senior Software Engineer, IBM
[hidden email]
phone: 720-342-5621
|
Locked
