How do I perform a mediation analysis in analysis of covariance (ANCOVA)?

More Mehdi Azizmohammad Looha's questions See All

Multi effect distillation modeling in EES?

Dear colleagues If anyone has a model of multi-effect distillation in EES or MATLAB software, please send it to me.

24 February 2021 7,282 1 View

Can we recognize signs of the "volatility clustering" property of a time series in its time domain plot?

My purpose is to recognize the volatility clustering property without statistical tests such as The Lagrange Multiplier (LM) test.

24 February 2021 4,150 3 View

How to define a new PDE in COMSOL?

(Note: Problem Solved) I am trying to define the phase field equation in the picture, using Coefficient form (or maybe convection-diffusion) PDE in COMSOL. However, I have a problem defining the...

06 January 2021 3,790 9 View

I need suggestions about my submitted manuscript which is taking abnormally long time?

Dear all I hope you are doing great and healthy. My question is about the abnormally long time being taken by the peer-review process of my submitted manuscript. I submitted my article in July...

21 December 2020 1,432 4 View

Why the number of secondary depressions on existing chromosomes varies?

15 November 2020 9,614 3 View

What should I interpret from the following TGA curves?

I have coated my adsorbent with SiO2 layer using Stober's method. I have performed the TGA for both the samples and as you can see from the images attached, they are completely different. From...

31 October 2020 9,390 9 View

How can I couple x-coordinates with y-z coordinates in COMSOL?

Hi, I want to couple x-coordinates with y-z coordinates so that the shape of the whole plate looks same movement. For example, if cross-section of the plate i.e. y-z axis shows deflection then...

25 September 2020 5,941 3 View

What is the best method for commercial production of Astaxanthin from Haematococcus pluvialis?

Dear Friends, I'm looking for a reference that has extensively explained the best method to increase the biomass of Haematococcus pluvialis algae as well as the extraction of Astaxanthin from it....

30 August 2020 2,920 3 View

Which parameters to look in the Baseline report to determine the worst Cytometer for an harmonization?

I would like to harmonize different cytometers because I have a lot samples to analyze. To perform this harmonization I need to know which device is the least efficient? Could someone tell me...

09 August 2020 5,529 4 View

Which journal do you suggest for publishing a crystal structure report?

Which journal do you suggest for publishing a crystal structure report?(it is better that the journal bee in JCR and free of charge)

27 July 2020 312 18 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

How to manually calculate p value in ANOVA? what is the equation or formula for it?

03 March 2021 4,928 5 View

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

Do we need to write protocol for a second study of a systematic review that has been registered and published?

I have conducted and published a systematic review and meta-analysis research with the topic related to public health and health pomotion (protocol was registed in PROSPERO). Now we want to...

03 March 2021 8,920 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

Do I need to do linear regression before running mediation analysis using PROCESS MACRO by Hayes ?

I just wanted to check if I need to run a linear regression separately if I am using PROCESS MACRO to run mediation analysis. Thank you.

02 March 2021 4,359 3 View

Sample dilution for quantitative analysis using ELISA?

If the detection range is in ng/ml but the reference range is in ug/ml for a molecule or protein in serum or plasma .how to dilute and what is the initial volume to be taken for quantitative analysis

02 March 2021 7,670 3 View

Is There Any Feasible Method To Test Fluorescent Compounds Other Than Fluorescence Spectrometers ??

Is There Any Feasible Method To Test The Efficiency Of Fluorescent Compounds Other Than UV Spectrometers ? Suggestions Would Be Appreciated !

02 March 2021 5,785 3 View

David Eugene Booth

Same way as always. Just add the covariate as an IV to your regression model. Google mediation moderation research virginia R covariate for examples. Best, David Booth

Sorry. Forgot to add pre-post is the best DV.

Daniel Wright

You need to decide whether to have post-pre as the DV, or have post as the DV and pre as a covariate. There is lots on this. Google Lord's paradox. For example: Article Allocation to groups: Examples of Lord's paradox

. This paper notes that one of the things that will inform your choice is how variables influence your two Z variables.