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Computing power (1-beta) for GLMM in SPSS

In your situation, power depends on the link function, the distribution family, the model forms of both the fixed and the random effects, the distribution of predictors, the relationship between the ...
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Multiple Linear Regression - Can independent variables with a very weak relationship to the DV be used in a model?

Yes. Selecting DVs for your model depends on what question you are trying to answer and what behavior you expect from the variables based on subject matter knowledge. For example, you might be ...
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Odd ratio become different direction after adding other variables in logistic regression model

This looks like a case of Omitted Variable Bias. In the first model, you are including only self-centeredness as the independent variable. This means that you are excluding/omitting some important ...
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