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  • 1.  Linear Mixed Models - Redundancy

    Posted Thu June 01, 2023 07:02 PM

    Hello, I am running some linear mixed models with categorial variables. The last line of each one is always set to redundant. For example:

    Intercept

    94.458

    14.626

    144.296

    6.458

    <.001

    65.549

    123.367

    Treatment 1

    36.177

    9.928

    338.236

    3.644

    <.001

    16.649

    55.704

    Treatment 2

    9.553

    9.919

    338.079

    .963

    .336

    -9.959

    29.064

    Treatment 3

    12.878

    9.680

    337.363

    1.330

    .184

    -6.162

    31.918

    Treatment 4

    		 0b 0

    .

    .

    My question is, how can I obtain the values for the last variable?



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    Stacy Adams
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  • 2.  RE: Linear Mixed Models - Redundancy

    IBM Champion
    Posted Thu June 01, 2023 07:54 PM
    The contrasts are comparisons against Treatment 4.  If there were no other variables, that would leave the intercept value (assuming that you are using treatment contrasts, which is the default).

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    Original Message


  • 3.  RE: Linear Mixed Models - Redundancy

    Posted Thu June 01, 2023 07:59 PM

    Hi Jon, I understand. Does this mean I would still need to compare all of the others against one another?

    Do I report the table just like this? I just want to make sure I am not missing reporting information that is needed.



    ------------------------------
    Stacy Adams
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    Original Message


  • 4.  RE: Linear Mixed Models - Redundancy

    IBM Champion
    Posted Thu June 01, 2023 09:26 PM
    If the factors have more than two categories and are of interest in themselves  such as reflecting a treament, you would want to be sure to connect them with the hypotheses being tested.  You can request the LMATRIX but the Parameters table pretty much tells the story.


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    Original Message