Hi, I'm doing my master dissertation. My research aims to investigate how individual factors (intrinsic motivation, paradox mindset, task significance, resource available, proactive personality) in total five independent variables impact employee creativity mediated by unlearning(the process employees abandon old outdated knowledge and skills to learn new ones).
Could I say the mediation effect works on the whole box of 5 independent variables?
Hello Jun,
The classical demonstration of mediation is to show that the direct effect of a variable, X, on some outcome variable, Y, is small or negligible compared to the indirect effect via a mediating variable, M (e.g., that the standardized path coefficient from X-M multiplied by the coefficient from M-Y is noteworthy in magnitude compared to the direct path coefficient of X-Y).
Here is a link to a web page that David Kenny has, which outlines the classical approach very nicely: http://davidakenny.net/cm/mediate.htm
Your hierarchical regression approach doesn't demonstrate that pattern, and is a very limited way of trying to demonstrate the mediation phenomenon. I'd suggest a path model (simple case of structural equation modeling, as there does not appear to be a measurement model and/or latent variable involved).
However, if you're wedded to using regular regression programs for your analysis, here's an explanation of how to check for presence/absence of mediation via OLS regression: http://web.pdx.edu/~newsomj/semclass/ho_mediation.pdf
Are you communicating with your advisor (and committee) as to how to proceed on this project?
Good luck with your work!
I recommend what was mentioned by David, in your analysis I don't think you should place the variables age, years, gender, since they are categorical variables, so your result is biased by a direct effect greater than the total effect. I recommend you use jamovi or jasp that tbn are easy to use programs that have mediation analysis.
If you want to see your results in SPSS, I recommend the book "Multiple Regression and Beyond" by Timothy Keith.
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