# Questions tagged [interaction]

A situation where the effect of an explanatory variable may depend on the value of another explanatory variable.

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### SPSS MACRO MODEL 14 INTERPRETATION

I don't understand how to interpret spss macro model 14. Can someone help me for that? I put all the data down below. But I don't understand how to look at significant values in this matrix. And I don'...
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### Contribution in a regression with interaction terms

I have a simple regression model y ~ intc + a + b + a * b, let's say I can estimate this model accurately. (a, b) are two positive variables. I want to know what ...
• 263
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### Moderation analysis with ratio variables

Currently I am writing my master thesis and got stuck with my data analysis. I want to investigate whether family firms exhibit a lower degree of internationalization in comparison to non-family firms....
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### can i compute an interaction variable by multiplying a standardized variable and a mean centered variable?

I need to do a multiple hierarchical regression analysis for my master thesis. my continues independent variable is: online exposure to cannabis use. I used five items/questions/variables to compute a ...
16 views

### Are these effects missing from my glm output because of a possible dummy trap?

I have a few generalized linear mixed model questions. I have an experiment that asked "is there a differential response between asexuals and sexuals by population density?". I am ...
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### ANOVA interaction effect

https://i.stack.imgur.com/wdXwB.jpg If I'm performing ANOVA using the formula in R: aov(Ileibacterium ~ diet*cage, data) Context - there are 3 cages per diet with ...
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### Adding independent variables to mixed effects model and controlling for interaction [duplicate]

I have formed 2 separate mixed effects models to see how these variables affect "chance" (this is risk taking behavior): ...
1 vote
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### Is multilevel modeling necessary: only 1 member of each group at individual level with group-level moderator

I have data where I am examining the moderating effect of a group-level variable (performance) on the relationship between two individual-level variables, X (2 experimental conditions) and Y (attitude ...
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1 vote
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### Interpreting interaction effect with ln(time) in Cox regression

I am fitting a Cox proportional hazards model with the interaction effect dummy:ln(time). How would you interpret the result? Is it a simple exp(x)-1)*100 to receive the percentage increase in y? Edit:...
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### Assessing importance of interactions between categorical features

The issues with using feature_importance of models such as XGBoost, or even using packages like SHAP or ELI5, is that the results are displayed in a way that doesn'...
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### How is the feature interaction different in XGBoost vs. a fully connected neural network

When you know your features could interact with each other, will you choose XGBoost or NN-based models? My friend is training with an XGBoost, and he manually adds interacted features (X1 * X2) as new ...
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### Anova interaction is non significant but post-hoc is

I run an ANOVA which indicates that room:time is non significant, but post-hoc test shows that time has an effect in room 2 but not in room 1. Is this a consistent result ? What does exactly the ...
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### Interpreting interaction effects for categorical reference group in regression

I am running a regression model in R including the following variables: Intent = continuous DV Attitude = continuous IV Story = categorical IV in 4 levels: Consumer, Heritage, Vision and Product ...
1 vote
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### Anova shows a main effect but not the t-test

I run an ANOVA which indicates that a variable is significant, but running a t-test on the same variable shows no significance. Is this a consistent result ? Here are more details of what I did: My ...
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### Centering predictors in linear mixed effects and explaining three-way interactions with continuous variables [duplicate]

I am working on a Linear Mixed Effects model. All four predictors are continuous variables. Full model: ...
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### Test for interaction effect when contrasting specific timepoints in mixed-model

I'm having a mixed model (lmer in R) with 5 repeated measurements (time is categorical), and 6 groups, and several covariates. I'm mainly interested in seeing whether there is a significant difference ...
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### Multiple regression - moderation

Best, For my thesis I have to do a multiple regression analysis for a moderation. My results show that model 1 (without interaction term) is significant, but model 2 (with interaction term) is not ...
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### Interpreting the results of an interaction plot

I have data on 3 species of fish that we fed 2 different types of food and we measure the eggs they lay (number of eggs are a coefficient, but that's not important for this question). The fish species ...
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### interaction between (possible) correlated variables

Suppose I have a set of variables a,b,c,d,f,g,h,i, and I created a composite score by summing these eight variables into a composite score e=(a+b+c+d+f+g+h+i). Now I want to explore the interaction on ...
1 vote