[R-meta] Negative values of df in test of moderators using robust()

[Röhl, Sebastian]

Dear all,

I have a question regarding robust(): I'm using robust with clubSandwich-option for testing moderator effects.
In the test of moderators, a negative df2-value appears:
Test of Moderators (coefficients 1:8):�
F(df1 = 8, df2 = -2.68) = 0.0000, p-val = NA

In the standard output (without CRVE):

Test of Moderators (coefficients 1:8):

QM(df = 8) = 10.0880, p-val = 0.2589

How could I interpret this phenomen? Could this happen due to small numbers of ES for some of the moderators?

Thank you for your help!
Best,
Sebastian


****************************
Dr. Sebastian R�hl
Eberhard Karls Universit�t T�bingen
Institute for Educational Science
T�bingen School of Education (T�SE)
Wilhelmstra�e 31 / Room 302
D-72074 T�bingen
Germany

Phone: +49 7071 29-75527
Fax: +49 7071 29-35309
Email: sebastian.roehl using uni-tuebingen.de<mailto:sebastian.roehl using uni-tuebingen.de>
Twitter: @sebastian_roehl  @ResTeacherEdu



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