mediation

  1. 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...
  2. 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...
  3. 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...
  4. 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...
  5. 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...
  6. 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...
  7. 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 -...
  8. 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...
  9. J

    Mediation without hypothesizing a direct effect

    I know the current view (contrary to Baron & Kenny) is that you do not need to find a significant direct effect to test for mediation (e.g., Shrout & Bolger). However, can you still test for mediation if you do not hypothesize a direct effect? For example, I'm testing a model in which X...
  10. M

    Nominal Mediation - Is it possible to test for mediation with a nominal dependent?

    Hi everyone, I'm currently working on my thesis which involves mediation using nominal independents and dependents, as well as scale mediators. I understand that binary mediation is possible, using logit or probit models. However, is it possible to test for mediation when your dependent...
  11. L

    Minimum sample size for moderation analysis

    Hi everyone, And thanks for the great job you are doing here. I have a question regarding statistical power and regression. How can I calculate the minimum sample size based on the number of moderators I have in multiple regression? Is there an online tool for this? If for example I have 5...