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What is the reason why there is a discrepancy between p values of Jasp and SPSS for Wilcoxon test?

I run a Wilcoxon test for the folowing data: pretest: 63 75 75 74 65 63 and post test: 70 48 65 60 68 57 I obtained a W of 17 for a p level of 0.219. I used SPSS for the same data, I have a p...

06 May 2020 2,784 3 View

What is the best way to explain and learn Principal Component Analysis (preferably for VR)?

For my master thesis I am trying to make PCA more understandable by explaining it with the means of virtual or mixed reality. In order to do this, I want to find out what goes wrong when people...

07 November 2018 2,349 4 View

Does anyone know reliable, low-cost and user-friendly technique in order to test polymer adsorption on colloidal rodlike nanoparticles?

I am currently working with cellulose nanoparticles. I would like to test if the polymer I am using are adsorbing or not onto their surface. There are different techniques such as Isothermal...

19 July 2016 954 3 View

Giant black hole at the center of spiral galaxies

Giant black holes are suspected be located at the center of spiral galaxies. In our galaxy, it was observed that stars located near the center have elliptical trajectories that correspond to the...

30 November 2015 8,722 29 View

Does anyone know if measures were performed on the Doppler shifts of the probe that reached Pluto (type Pioneer effect)?

There has never been a satisfactory answer to this effect. Finally, due to lack of good explanation, it has been considered as an 'experimental' error or material problem (but observed at least on...

05 November 2015 2,607 4 View

Does anybody know of a good anti-human HVEM antibody for western blot?

hello I'ma looking for a good anti-human HVEM antibody cheap and efficient for western blot. Preferably goat or mouse. Thanks

05 November 2015 1,530 3 View

How can solubilize plant pigments after they've been dried ?

We found an efficient method to extract pigments from plants. Just after the filtration, when the pigments were still wet, we use them and paint with a brush. But after are dried and milled, its...

18 December 2013 4,308 2 View

How to isolate miRNAs physically bound to a target gene?

Usually, algorithms predict miRNA targets with less than 50% accuracy. This is not science. I would like to isolate all the miRNAs based on their physical association with my mRNA of interest. I...

17 November 2013 5,498 2 View

What is the best way to keep an anaerobic chamber anoxic in the absence of hydrogen?

I'm a graduate student who works with an anaerobe, so I often work in an anaerobic chamber. I've been working on an assay that involves the steady-state of the quinone/ quinol pool. Anoxic...

03 March 2021 2,971 1 View

Good sites to recruit survey participants on a grad school student budget?

Any good recommendations for participant recruitment for online surveys on a grad school student budget?

02 March 2021 4,293 4 View

Is there a recitation score bank system for fair evaluation and assessment of student recitation?

In actual and virtual class, even if there is rubric for recitation, students may still fail to receive fair grades or scores. Others are active in recitation and others are not or others may fail...

26 February 2021 8,387 3 View

Do you think there is cognitive oversaturation in the current pandemic? What impact can this have? And other manifestations?

Dear colleagues, Do you think there is cognitive oversaturation in the current pandemic? What impact can this have? And other manifestations? The question is mainly aimed at adolescents (pupils,...

23 February 2021 7,796 4 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

Latent profile analysis based on two variables/sources of data?

Hello, for my master project, I would like to conduct a latent profile analysis about self-regulated learning skills. I would like to take two different measures into account when creating the...

21 February 2021 2,326 3 View

Online surveys for social sciences researchs: what are your opinions about this tool and how can we improve the research design to incorporate online?

Good morning everyone, Due to the pandemic, I conducted several online surveys. It is quite agile, not at all expensive, but there are several problems: the sample's representativeness and its...

21 February 2021 7,457 3 View

Where can I find raw quantitative datasets on ecosystem services?

I'm an Undergraduate student on the search for a research topic which has to involve any ecosystem service(s) and a response to environmental change. I'm looking for raw quantitative data sets (I...

19 February 2021 5,911 2 View

Person-Codes for questionnaires in longitudinal studies: Is there an easy solution for better matching-rates?

Hi, I have a problem regarding matching of longitudinal data in my field of research (university students). We have a Person-Code for matching data measured in different time points, but 30%+ of...

17 February 2021 3,075 4 View

Level 1 pre-post multilevel regression: Panel data or ANOVA approach?

Dear colleagues, I am currently teaching myself in multilevel analysis using educational data. I found few to zero literature on basic analysis methods. In my context we frequently use level-1...

17 February 2021 9,378 5 View