Anomalous results with glmer().
On Wed, 28 May 2014, Rolf Turner wrote:
Some months back I sent an inquiry to this list concerning the analysis of some linguistics data with which I am involved. essentially zero. Which is silly. If I fit the same model using lme4 version 1.1-7 (and ignore the warning about failure to converge) I get sensible looking estimates of the variances of the random effects, but an impossibly wrong estimate of at least one of the fixed effect coefficients. (The estimate says that the success probability is larger for phoneme type "Mclus" than it is for the baseline type "Fclus". However a raw tabulation show that the success probability for Mclus is much, much smaller than for Fclus.
FWIW,
MClus
glm -2.6950 (0.10455)
glmer (+Stud) -2.74464 (0.10536)
glmer (+Words) 0.36826 (0.19783)
glmer (+S+W) 0.33574 (0.19981)
glmmML (+Stud) -2.7444 (0.10546)
glmmML (+Words) 0.3683 (0.19816)
It's words that will always get you into trouble...
| David Duffy (MBBS PhD)
| email: David.Duffy at qimrberghofer.edu.au ph: INT+61+7+3362-0217 fax: -0101
| Genetic Epidemiology, QIMR Berghofer Institute of Medical Research
| 300 Herston Rd, Brisbane, Queensland 4006, Australia GPG 4D0B994A