Can a moderator consist of more than two groups?

More Tahir A. Wani's questions See All

Anyone interesting in writing a paper on Technology Adoption?

Anyone interesting in writing a paper on Technology Adoption? Please get in touch :)

11 December 2015 8,583 7 View

How could I test moderation with a multi-group factor like occupation?

How to test moderation with a multi-group factor like occupation, education or age. Is there any addon available. For two group group factor like gender or a yes/no question its easy but I cant...

04 May 2015 4,680 4 View

After doing EFA the cumulative% of variance is 49%. Is anything below 60% unacceptable?

After doing EFA the cumulative% of variance is 49%. Is anything below 60% unacceptable or can we use lesser values as well. If yes what is the minimum threshold level?

04 May 2015 4,383 3 View

If factors are showing very low cronbach alpha value ?

If factors are showing very low cronbach alpha value (Standardized questionnaire used) but in CFA the model fit is quite good, what as a researcher shall I do? Shall I proceed to SEM?

04 May 2015 724 5 View

What sampling technique shall I use for my study?

I am trying to study the technology adoption and customer satisfaction with respect to mobile phone users in India. So it makes the total population for my study as 400 Million mobile phone users...

03 April 2015 9,718 3 View

What test should i use in comparing the correlation between categorical and continuous variables?

Dear all, I have the variable (Surgery duration) represented by values in minutes and the variable (preoperative neuropraxia cases) represented as (Yes/No) values. I want to compare these two...

03 March 2021 5,427 5 View

How to compare 2 samples recruited with different sampling methods?

If I want to compare characteristics of 2 groups of patients, one group is recruited from a random sample of the general public while another group is from a sample with a fixed gender (male to...

26 February 2021 3,526 3 View

Must a control group to be in the same semester that a experimental group for a study in education?

Hi everyone, I'm researching about mobile learning in higher education. Due to the small number of the students in the semesters, I cannot have a experimental and control group together. I'm...

22 February 2021 3,653 11 View

Can I arbitrarily take a cycle number of 40 for the gene that was not expressed at all in qPCR results calculation?

I ran RT-qPCR for a control and a treated group and it appears that my gene of interest was not expressed at all in any of the subjects in the control group. So I was wondering if I could...

20 February 2021 6,243 10 View

How to perform EEG classification of Alzheimer and control groups?

I am doing a project on classification of EEG signals of Alzheimer's disease and control groups. Previously, I extracted the alpha power of the EEG signals and found out the strengths. I want a...

18 February 2021 8,502 2 View

Which statistical test is best to seperate out treatment effects meta-analysis?

I am doing a meta-analysis and am looking for some guidance on which statistical test will help me do the following. I want to understand the effect size a treatment has on a population. There...

16 February 2021 8,033 3 View

Which regression is best fit when moderator is categorical and dependent variable is latent in nature?

I am using categorical variables as a moderator variable, and my dependent, mediator and IV variables are latent in nature. Which regression test I can apply. As logistic regression is for binary...

11 February 2021 1,584 3 View

Examples of GAMS syntax for a permutation flowshop scheduling problem?

Hi everyone, I am new to the field of industrial engineering. I need to formulate a gams model for a permutation flowshop scheduling problem. I will appreciate if someone can send me a code...

09 February 2021 891 2 View

ETA-squared statistics used to correlate observed versus measured variables?

Can the eta coefficient be used when the categorical and the quantitative variable is dependent? E.g. in the field, I made a prediction into a category (e.g. high, low or medium) of what I think a...

08 February 2021 3,756 3 View

With or without a Control Group?

Hello, I will do a research with K-12 students (my own students), and it includes a treatment which will last around 3 months. We will see how and whether it will affect their motivation. That's...

08 February 2021 632 4 View

Karin Schermelleh-Engel

Tahir, yes, you can do that. Of you have 3 groups, just include 2 dummy variables in your regression equation tohether with threir products with the predictor variable. Using structural equation modeling, you could use multi-group analysis.

Regards, Karin

s. Béatrice Marianne Ewalds-Kvist

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