Innehållsförteckning
Vad är en modererande variabel?
Variabel som kommer mellan den oberoende variabeln och den beroende variabeln i den tänkta orsakskedjan. Ska inte kontrolleras för om man vill utesluta spuriositet. Variabel som styr vilken effekt den oberoende variabeln har. Kallas ibland för modererande variabel.
Vad är en medierande variabel?
Innebörd i statistik: En variabel som inverkar på (modererar) hur starkt sambandet mellan två variabler blir beroende på moderatorns inverkan. Exempel inom psykoterapi: Omständigheter som påverkar viss typ av psykisk ohälsa kallas moderatorsvariabler.
How do you calculate moderation in a regression?
Steps for moderation analysis 1 Compute the interaction term XZ=X*Z. 2 Fit a multiple regression model with X, Z, and XZ as predictors. 3 Test whether the regression coefficient for XZ is significant or not. 4 Interpret the moderation effect. 5 Display the moderation effect graphically.
What is a moderator variable in research?
To summarize, a moderator Z Z is a variable that alters the direction and/or strength of the relation between a predictor X X and an outcome Y Y. Questions involving moderators address “ when ” or “ for whom ” a variable most strongly predicts or causes an outcome variable.
How to conduct Moderation analysis?
How to conduct moderation analysis? Moderation analysis can be conducted by adding one or multiple interaction terms in a regression analysis. For example, if Z Z is a moderator for the relation between X X and Y Y, we can fit a regression model Y = β0 + β1 ∗ X + β2 ∗ Z + β3 ∗ X ∗ Z + ϵ = β0 + β2 ∗ Z + (β1 + β3 ∗ Z) ∗ X + ϵ.
How do you add a moderator to a model?
1) Generate a new variable (if you can justify this by the literature or by observed confounding) which represents the product of the potential moderator and the respective independent variable 2) Include the new variable into the model – next to all the direct effects