Model specification for moderation in multilevel model with R?

I've got longitudinal data from a psychological experiment and try to model the data using R package lme4. My dependent variable y is continuous and is measured at eleven occassions. Each...

13 April 2020 6,619 4 View

How to connect hypothesis to your discussion?

Hello, The question was answered. Thank you! Kind regards

12 January 2020 1,834 2 View

Convert units of pre-exponential factor in Arrhenius equation for reaction rate?

I found several pre-exponential factors for the reaction rate of calcium carbonate crystallization. They are usually given in m^4 kg^-1 s^-1. Is there any change I can convert them to m^4 mol^-1...

08 October 2019 3,770 1 View

Is it true that light produced in the core of the sun needs a million years to reach the surface?

Atoms in the sun core are very fast moving. I read, that for this reason the light produced as a by-product of hydrogen fusion cannot pass directly to the sun surface (which would be a matter of...

19 January 2019 3,495 3 View

If we look from Earth into deep space with our telescopes beyond our galaxy, is the universe uniformly dense in all directions?

26 January 2018 2,314 5 View

Best way to clean CTFE equipment in order to avoid DNA contamination?

Dear colleagues, I received different pieces of lab equipment (mainly pestils and alike) out of CTFE and would like to reuse the same pestils without autoclaving them every time. I do not have any...

29 August 2017 4,356 2 View

What shall I do, when I conducted an exploratory factor analysis and it doesn't identify two of my constructs as separated constructs?

I conducted an explanatory factor analysis (I used different rotations and used principal component). The explanatory factor analysis wasn't able to identify two of my model's constructs as...

25 July 2017 8,445 2 View

Has anyone observed that MIN6 progressively express less GLP1R with increasing passage number?

19 October 2016 3,228 1 View

(Spatial) Working memory task in headfixed mice ?

I am investigating (spatial) working memory in mice. Due to the nature of the project the mice are head-fixed and therefore are not able to move around freely, eliminating most common tests for...

04 July 2016 2,997 2 View

What are best practices and relevant tools of sustainable financial investments (& insurance meachnisms) in rural activities and/or landscapes?

In many rural areas of "developing countries" small scale agriculturalists (farmers/fishers/herders/...) see the necessity for (financial) investments, they have the capacities (social & human...

25 June 2015 5,367 5 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

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

Chlorinated organic formation in odor control scrubbers using hypochlorite?

I'm involved in a study of odor control technologies for municipal wastewater treatment plant. One of the control options involves a chemical 2-stage (acid/alkaline) packed bed scrubber. The...

03 March 2021 3,661 2 View

What solvent can I used for Paal Knorr reaction between 6-amino hexanoic acid and 2.5 hexanedione?

I am try to make the Paal Knorr reaction between 2.5 hexnedione and 6-amino hexanoic acid, my problem is type of solvent to use, because 6-hexaminohexanoic acid is soluble in water but I am not...

02 March 2021 4,443 2 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