All Questions
10 questions
13
votes
1
answer
53k
views
The main effect will be non-significant if the interaction is significant? [duplicate]
I am using linear mixed models to identify important factors, and it turns out that:
A: significant
B: not significant
...
- 1,345
7
votes
1
answer
7k
views
How to interpret the significant interaction of two non-significant main predictors?
I have two non-significant main binary variables in my binary logistic regression model, but their interaction is significant. The variables are centered and no multicollinearity is the case (all VIFs ...
- 1,363
3
votes
3
answers
489
views
Comparing models with main effects and interactions
I have two models:
Model 1: Only contains independent variable $x$, while $x$ is non-significant.
Model 2: Contains $x$, $m$, and $x * m$, and $x * m$ is significant.
How could I illustrate this ...
- 31
4
votes
3
answers
9k
views
Significant interaction but non-significant simple slopes
I conducted a multiple regression analyses that included an interaction term (continuous x continuous). The interaction term was significant, but none of the simple slopes (1 SD above the mean, at the ...
3
votes
1
answer
12k
views
How to test if an interaction is significant: interaction terms or model comparison?
I ask the question based on a current case, but I would really appreciate a general answer, because it has been bugging me for some time:
I'm running regressions with interaction effects.
How do I ...
- 33
6
votes
2
answers
8k
views
How do you get confidence intervals for interactions of variables?
Suppose I am building an OLS model with the following specification:
$$y = \alpha + \beta_0x_0 + \beta_1x_1 + \beta_2x_0x_1 + \epsilon$$
The variable $x_1$ is continuous and $x_0$ is binary. When $x_0$...
- 2,251
5
votes
1
answer
1k
views
Significance in simple regression but not multiple regression
Background: I am trying to show an increase in a number of variables over time, so initially I ran a simple linear regression. However, I subsetted the data so ...
- 427
3
votes
2
answers
525
views
Graphing versus further testing interactions
Following the question here, I have come across different (textbook) recommendations.
Some authors suggest that the effect of the moderating variable is best understood in a graphic form.
Others ...
- 3,345
1
vote
1
answer
384
views
Compare conditional effects (simple slope) from regression model
I have the following regression outputs from a model that includes both quadratic and cubic interaction terms. I calculated the simple slopes using the simle_slope from reghelper.
...
- 347
0
votes
1
answer
589
views
One of the main effects not significant, but interaction term significant
A is significant
B is not significant
A x B is significant
Do I say that
(1) There exists a ...
- 165