ConQuest Community
Help desk => Questions and Answers => Topic started by: Georg II on June 29, 2012, 03:57:30 PM
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Ray,
What's the reason of convergence failure for cases?
In a within-item multidimensional model ConQuest gives a message that there convergence failure. The person parameters are some unreadable mixture of some large numbers and characters, as shown below.
What should I do to get person ability estimates?
Thanks
Georg II
1.#QNAN -1.#IND0 1.#QNAN -1.#IND0 1.#QNAN -1.#IND0 1.#QNAN -1.#IND0 1.#QNAN -1.#IND0 1.#QNAN -1.#IND0 1.#QNAN -1.#IND0
0.30120 -1.#IND0 1.25060 -1.#IND0 0.30120 -1.#IND0 0.30120 -1.#IND0 1.25060 -1.#IND0 1.25060 -1.#IND0 -5.60935 -1.#IND0
13.10653 47453132.81213 12.83898 47453132.81213 13.10653 47453132.81213 12.83898 47453132.81213 12.83916 47453132.81213 12.83916 47453132.81213 -12.79817 47453132.81213
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This looks like a bug or an identification problem. Please email me your data and control file and I will diagnose the problem.