DIVAUTO= automatic changes to ESTMULT= when estimation diverges |
During JMLE estimation, estimates may not converge for anchored or sparse data. Reducing the estimation multiplier, ESTMULT=, makes estimate changes smaller, assisting convergence.
DIVAUTO=No (default) |
Do not allow automatic changes to the estimation multiplier ESTMULT= during JMLE estimation. Changes to ESTMULT= can be made with the Diagnosis menu.This is compatible with Winsteps 5.9 and similar versions. |
DIVAUTO=Yes |
If JMLE estimates are not converging, allow automatic changes to the estimation multiplier ESTMULT= during JMLE estimation. Changes to ESTMULT= can also be made with the Diagnosis menu. This is compatible with Winsteps 4.5 and similar versions. |
Example:
In the control file: DIVAUTO=No ; no divergence control (default)
In the Analysis window:
| JMLE MAX SCORE MAX LOGIT LEAST CONVERGED CATEGORY STRUCTURE| | ITERATION RESIDUAL* CHANGE PERSON ITEM CAT RESIDUAL CHANGE| ..... >============================================================================< | 53 .12 -.0002 11765 70* | >============================================================================< | 54 -.15 .0002 11765 70* | >============================================================================< | 55 .13 -.0002 1617 70* <- diverging | Estimation may have diverged. Press Ctrl-F to stop iterations or Diagnosis menu: Reduce ESTMULT= <- manual divergence control >============================================================================< | 56 -.11 .0001 187 70* | >============================================================================< |
In the control file: DIVAUTO=Yes ; with automatic divergence control
In the Analysis window:
| JMLE MAX SCORE MAX LOGIT LEAST CONVERGED CATEGORY STRUCTURE| | ITERATION RESIDUAL* CHANGE PERSON ITEM CAT RESIDUAL CHANGE| ..... >============================================================================< | 28 -.11 .0001 187 70* | >============================================================================< | 29 .13 -.0002 187 70* | >============================================================================< | 30 -.15 .0002 187 70* <- diverging | Estimation may have diverged. Reducing ESTMULT=.600 <- automatic divergence control >============================================================================< | 31 .13 -.0001 187 70* |
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Help for Winsteps Rasch Measurement and Rasch Analysis Software: www.winsteps.com. Author: John Michael Linacre