mixed with robust build

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mixed with robust build

Kornbrot, Diana
am trying the robust build in mix, as my data are definitely not normal even when transformed to logit
spss is very generously giving me more df2 than I have subjects
happening on several different data files
can that be right?
___
*Generalized Linear Mixed Models.
GENLINMIXED
  /DATA_STRUCTURE SUBJECTS=pno REPEATED_MEASURES=within1 COVARIANCE_TYPE=UNSTRUCTURED
  /FIELDS TARGET=freq TRIALS=FIELD(Nmax)  OFFSET=NONE
  /TARGET_OPTIONS DISTRIBUTION=BINOMIAL LINK=LOGIT
  /FIXED  EFFECTS=within1 USE_INTERCEPT=TRUE
  /BUILD_OPTIONS TARGET_CATEGORY_ORDER=ASCENDING INPUTS_CATEGORY_ORDER=ASCENDING MAX_ITERATIONS=100 CONFIDENCE_LEVEL=95 DF_METHOD=SATTERTHWAITE COVB=ROBUST PCONVERGE=0.000001(ABSOLUTE) SCORING=0 SINGULAR=0.000000000001
  /EMMEANS TABLES=within1 CONTRAST=NONE
  /EMMEANS_OPTIONS SCALE=ORIGINAL PADJUST=LSD
….

Fixed Effectsa
Source
F
df1
df2
Sig.
Corrected Model
20.745
2
243
.000
within1
20.745
2
243
.000
Probability distribution: Binomial
Link function: Logit
a. Target: freq/Nmax

There were 242 subjects
    
please help
Diana

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