Hello everyone,

I am currently analysing data for my Bachelor thesis. I want to find out if people's decision-making ability (X) has a direct and/or indirect effect through their tendency to overeat (M) on their BMI (Y).

I have conducted a simple mediation analysis using the macro PROCESS in SPSS. As far as I have (hopefully rightfully) concluded the effects are not significant.

However, since the age range of the tested participants is very broad, I decided to include the age as a covariate.

I am not sure how to exactly interpret the results now. I have included the SPSS output in a Word document below to make things more visual.

In the part where it says outcome variable "BMI", "alter" (=Age) has a coefficient of 0.086 with a p value of .0103.

Does that mean that the age has a significant effect on the BMI?

Also in the total effect model found below it says that money_sum (=decision making ability) has a coefficient of -.0005 (p= .3271)

and age has a coefficient of .0860 (p= .0081).

Again does that mean that age has a significant influence on the the BMI?

But how can I interpret then the total (effect = -.0005), direct (-.0005) and indirect models?

Does age not have an effect after all? I am a bit confused now a I really appreciate your answers to help me get rid of this confusion.

Thank you very much!

Kind regards,

Helena

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