interaction

  1. R

    Compare differences between exp. and contr. of two groups

    Hi! I already used lots of search engines without finding an answer to my problem. I am testing two methods for manipulating religious belief. For each of the methods there exists an experimental and a control group. So there are in total four groups (between-subject design). My hypothesis...
  2. 1

    Interpreting the interaction effect in a well known paper

    Attached you will find a well known research paper. If you go to page 438 (page 9 of the pdf file) you will find a model where: change in tax rate = b1xMiss + b2x Miss Amount +b3(Miss x Miss Amount) + controls according to the model , firms play with their accounts in order to pay less...
  3. L

    Interaction term with no biological significance

    Hello friends, I've used a negative binomial GLM to look at how invertebrate abundance (over dispersed) is affected by seagrass density. There is a negative interaction between seagrass density and epiphyte biomass (the little plants growing on seagrass blades that invertebrates eat)...
  4. J

    Testing Simple Effects for Generalized Linear Regression

    Hello, I have found significant interaction effects when analyzing a negative binomial generalized linear regression model. However, I am not sure how to further explore the interaction. I am currently using SPSS. How can I conduct follow-up simple effects to examine the interactions? Can I...
  5. N

    interaction continuous*dummy:possible to treat continuous variable as the moderator?

    Hey everyone. This is my first post here so please be kind to me :) . For my thesis my aim is to run a moderation analysis between organizational commitment and training. My dependent variable is job satisfaction. Org.commitment comes from 4 5-point likert-items, therefore I calculated the...
  6. M

    post-hoc interaction following lme with both categorical and continuous factors.

    Hello, I'm relatively new to R and have run into some problems. Hoping someone can help! I'm using lme on a model with several, both within/between, categorical/continuous and fixed/random effects. I have 1 x fixed 2-level categorical between-subjects variable "group" (dose vs. placebo), 1...
  7. N

    Main effect and interaction? Need help interpreting the graph.

    We performed a multiple linear regression with valence (negative, positive and neutral) as independent variable, social curiosity as controll variable and recognition performance as our dependent variable. No we got this graph (see attachments). Do we have a main effect and interaction...
  8. L

    Non Significant ANOVA results - need to explain why.

    I was given data to work on for a lab report. I did a 2 x 2 between subjects ANOVA (if it matters n=187). Main effect of IV1 was not significant. Main effect of IV2 was not significant. Interaction was not significant (although was .62 which I'm supposed to report as "marginally...
  9. T

    Mediaton Analysis

    Hey people, I am trying to find an appropriate mediation analysis method. I want to investigate how an INTERACTION of two variables mediates the association of two different variables. I have read about mediation analysis with one or multiple mediators, but nothing about an interaction as the...
  10. T

    Mediation analysis for two correlated mediators

    Hey people, I am trying to find an appropriate mediation analysis method. I want to investigate how an INTERACTION of two variables mediates the association of two different variables. I have read about mediation analysis with one or multiple mediators, but nothing about an interaction as the...
  11. L

    Types of interactions

    Hi, I am stuggling to find the right words for the statistical terms I would like to look up. Hope, you can help :-) I am looking at a higher order construct (organizational climate), which manifests in eight dimensions. I am interested in elaborating how these dimensions interact and what...
  12. N

    Interaction between a time-varying and a time invariant variable? (Panel regression)

    Hi everyone, I have got a question regarding the specification of interaction effects in panel regressions (fixed effects within estimators). I would like to know: Can I create an interaction-term between a time-varying and a time-invariant variable? Some background: My data is from...
  13. B

    Interaction significant but simple slopes not significant?

    I have run a forum search and an internet search, and tried posting this question on other forums, but have been unable to find an answer to my specific problem. My question concerns interpretation of simple slopes generated from moderation analysis. I have conducted a moderation analysis as...
  14. J

    Is here a moderation (when b coefficients are nonsignificant)?

    I am trying to check if the relationship between X and Y is a moderated by M. Model is: Y = X + XX + M + XM + XXM X - independable, M - moderator, Y - dependable. Variables are continuous and normal. First I multiply, then center the variables (I hope it is right). Then run reggresion...
  15. A

    Transitioning from HLM (program) to R for Multilevel Modeling - Help!

    Hello! Thank you for reading and a big thank you if you can help. My goal is to successfully run this type of model in R. I know how to set up the dataset and interpret the results using HLM (the program) but I am completely lost when trying to get it into R. Screenshot of the model is...
  16. A

    interactions not allowed

    i am using a fixed effects model with log of wage as the dependent variable when i try xi: xtreg logwage i.d08##c.yrschool exp2 married, i(id) fe where i.d08##c.yrschool is an interaction term with d08 being a dummy for the year 2008 and yrschool being a continuous variable for years of...
  17. J

    Centering Variables in Interaction with Lagged Dependent Variable

    I have to run this regression: Y (t) = a + b1 X (t-1) + b2 Y (t-1) + b3 X (t-1)*Y (t-1) Y at time "t" is regressed using as IVs X at time t-1, Y at time t-1 (lagged dependent variable) and the Interaction of X at t-1 and Y at t-1. Both X and Y are continuous variables. I need to center...
  18. O

    Mixed ANOVA withinXbetween interaction not significant, interpret simple effects?

    Hi Experts, I have conducted a 2 (time: before, after) x 3 (condition 1 2 3) mixed ANOVA. The within X between interaction is only marginally significant .06. However, simple effects indicate significant change in conditions 1 and 2. The interaction indicates if change over time is a...
  19. Eaners

    Choosing an appropriate test: MANOVA? ANCOVA? Something else?

    I am performing a "dry run" statistical analysis on my dissertation data pretest, and I'm looking for a little guidance regarding the specific analyses I need to perform. I have three primary variables: Environment. Categorical, 1 of 3 conditions. Independent, assigned by experimenter...
  20. Lukan27

    Doing correct backwards elimination with interaction terms?

    I'm wondering about this, and I can't find an answer anywhere. My textbook (Agresti and Finlay 2009) clearly says how to do backwards elimination on a linear model, but I'm sitting in a situation my textbook doesn't explain. Neither was I able to find anything on Google or this forum, about this...