No output for mixed model

[Wiltrud Fassbinder]

Hi all,

I have used the ez package for mixed models before, and am not sure what I am doing wrong in the code. For:

OUTscor = ezMixed(

  data = Out1Asumtemp

  , dv = .(RTlnO)

  , random = .(SubjectID, ItemNumber1)

  , fixed = .(LPsem1_PerAccM11)

  , return_models = TRUE

)

print(OUTscor$summary)

print (OUTscor$formulae)

print (OUTscor$models)

I get 

  bits e w effect

------ - - ------

           LPsem1_PerAccM11     NA X - LPsem1_PerAccM11 

Time taken for ezMixed() to complete: 0 seconds

 

> print(OUTscor$summary)

            effect errors warnings bits

1 LPsem1_PerAccM11   TRUE    FALSE   NA

 

> print (OUTscor$formulae)

$LPsem1_PerAccM11

$LPsem1_PerAccM11$restricted

[1] "RTlnO ~ s(SubjectID,bs=\"re\") + s(ItemNumber1,bs=\"re\")"

$LPsem1_PerAccM11$unrestricted

[1] "RTlnO ~ s(SubjectID,bs=\"re\") + s(ItemNumber1,bs=\"re\") + s(LPsem1_PerAccM11,k=21,bs=\"ts\")"

What are those characters (e.g., bs=\"re"), and what am I doing wrong?

Thank you!

Wiltrud 

[Mike Lawrence]

Hm, strange. One thing to check: the default behaviour in ezMixed is to use generlized additive modelling to capture any non-linearities in the effect of continuous predictors. If you instead just want linear effects, you have to set the value of the `fix_gam` argument to `FALSE`. 

--
Mike Lawrence
Graduate Student
Department of Psychology & Neuroscience
Dalhousie University

~ Certainty is (possibly) folly ~

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