mediation

  1. Y

    Which method?

    Hello friends of statistic, first of all - sorry for my bad english, it's not my mother language :( ... Here is my problem. I have to make a study about helping behavior and I'm not sure which method I have to use. Scenario: A man with (low/high) status is helping (public/private shown). My...
  2. 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...
  3. 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...
  4. L

    Between Subjects Experimental Design- How to analyse

    I have conducted an experiment with 2 conditions, 50 people in each condition. Each person completed a booklet of tasks and self-report measures (the same booklet in each condition). I have conducted a simple T-test and have found significant differences between the two conditions on the...
  5. S

    Multilevel Mediation

    Hi, I have 130 participants and have multilevel data (5 days nested in each participant). I need to do a cross-level mediation (2-1-1) & am having trouble with the best way to do this using MLM in SPSS. I think the best way would be to use latent growth modelling or multilevel SEM but I don't...
  6. C

    Mplus code for testing mediation, moderation, and moderated mediation type hypotheses

    79 different model configurations gradually being added here, with diagrams, equations/algebra for calculating effects, and Mplus code for testing conditional indirect and direct effects http://offbeat.group.shef.ac.uk/FIO/mplusmedmod.htm Enjoy!
  7. B

    Multiple Mediation Model using INDIRECT Macro Vs. Amos - different results!

    Hi, I have a multiple mediation model with 1 IV, 6 mediators, and 1 DV (all are continuous variables). I also have one covariate to control for. I ran a mediation analysis using those variables (plus the covariate) using INDIRECT macro by Preacher & Hayes. Two of my partial mediations were...
  8. R

    How to do Mediation across pre-post timepoints?

    Hi all, I am looking into analyzing potential mediation and not sure how to approach it with two timepoints. For some context, participants are measured at two timepoints: pretreatment (T1) and posttreatment (T2). All participants receive the same treatment. At pre and post, they complete...
  9. Z

    Mediation analysis after multiple imputation

    Hi, after multiple imputation how do i do a mediation analysis? Do i simply obtain the product term using the pooled coefficient for X--> M (a) and M--> Y (b) and its std. error from the separate linear regression analysis to calculate using the MacKinnon (2002) method? I was not able to find...
  10. L

    Mediation, Bootstrapping and Sample Size

    I'm new to statistics overall, and even newer to mediation but I'm attempting to analyze data using Process for SPSS. Before anything else, do I need a specific minimum sample size and how do I determine this? Does bootstrapping take care of this, and then, how many bootstrapping samples do I...
  11. P

    Multiple regression then Sobel for mediation

    Hi, I am doing a mediation analysis. I first ran a multiple regression for IV (2 variables) to mediator. I want to do a Sobel test and use the unstandardized coefficient of the 2 IVs combined. However, I'm not sure where do find that number. Is it the "constant" Is it the R? Is it...
  12. L

    Do i need to correct for family wise error when doing moderation and mediation?

    Hi, I've been analyzing data for moderating and mediating relationships and am wondering how necessary it is to correct for family wise error in moderation and mediation analysis. I have read arguments for and against correction for family wise error in the literature. My moderation/mediation...
  13. P

    Interpreting Mediation results

    Hello, I have a few questions regarding interpretation of my results for Mediation using Hayes' Process macro. The key point for finding significance is to see that the Class Interval does not include zero. However, in my mediation model, although the indirect effect CI doesn't include zero...
  14. K

    Sobel test categorical IV (3 categories)

    Hi, I've come across similar threats but none have been answered unfortunately. For my bachelor thesis I have performed a regression analysis having coded my categorical IV into two dummies. Mediator and DV are both continuous. Only one of my IV conditions relates significantly to my mediator...
  15. A

    Mediation with Regression Analysis Need Help some basic Question (Using SPSS)

    I have 3 variables (2 are independent and 1 is dependent). All three variables are measured with questionnaires consisting of multiple questions recorded on 5 point scale. I want to perform regression analysis to check for mediation. How do I go about doing that? Do I have to transform or recode...
  16. I

    Is it appropriate to include intermediate outcomes in a predictive model?

    It is quite clear that one should not control for post-treatment variables / intermediate outcomes when the goal is causal inference, but I wasn't sure if the same advice should hold when one's goal is to build a model for prediction. Context for my question: I'm trying to build a model that...
  17. A

    a method for calculating the proportional mediating effect

    Dear All Hi I am Amir from Iran where we have no a well know psychologist especially in quantitative.I am not good in mediation. I used Preacher And Hayes (2008) SPSS Macro For Multiple Mediation of variable (FSFI). I found that there is a mediation role in my results. However, it is very...
  18. R

    How to conduct mediation analysis with ordinal (probit) regressions

    Hello everyone, I need to conduct a mediation analysis in which all the variables (i.e., the predictor, mediator, and outcome) are single items measured on 4-point Likert type scales (i.e., strongly disagree, disagree, agree, strongly agree). I have conducted ordinal (probit) regression...
  19. B

    ANOVA and mediation- could someone CHECK over this with me? Help gratefully received

    Hi, I really hope someone could help me out. I'm having a crisis of confidence. I have a PhD in psychology but it's been a while since I did "proper" stats analysis. I would be super grateful if someone could have a look over a completed ANOVA and mediation analysis (simple mediation -...
  20. A

    multiple mediators and multiple dvs - different results AMOS and MEDIATE (Hayes)

    I have a path model (longitudinal data): 1 independent variable (iv), 4 potential mediators (ms), 4 dependent variables (dvs); I compared models (chi square difference test) with and without direct effects of the iv on the dvs and the models did not differ, i.e. I chose the more parsimonious...