Should we use sample weights when using Instrumental Variables?

I was testing the relevance of an IV and the F value changed importantly when including sample weights (about 5 when the model is weighted and about 12 when it is not). However, considering that...

02 March 2019 6,446 2 View

Does anyone have an experience applying paper & pencil Implicit Association Test?

I am working on a P&P survey about attitudes toward science and I would like to include some gender's stereotypes measurement. However, the straightforward tests are usually assisted by...

05 June 2018 5,380 1 View

What are the differences between Conjoint Analysis and Factorial Survey?

10 November 2015 2,769 1 View

Some questionnaire to measure intrafamiliar violence and drug consumption in the family?

To develop a survey for youth population we have to include question about violence and drug consumption in the family. I want get some good examples to design the questions to the latin american...

03 April 2015 8,250 0 View

Is the cognitive bias a risk when you include a cognitive test in a large scale survey?

I am working in the design of a survey to a national representative sample. The time in the pilot application is around 50 minutes. In the final of the questionnaire we are including the Raven's...

02 March 2015 9,052 3 View

What scales exist to measure the attitude to the competence in youth or students?

I am designing a questionnaire to youth and we have to include a scale to measure competitiveness. Only we found a Scale of Anxiety in sport, but it is no applicable in this case.

01 February 2015 6,982 3 View

Does anyone ice-breaking question to be included in surveys?

01 February 2015 6,239 6 View

Can anyone recommend a measurement of reserve salary?

01 February 2015 3,202 3 View

What books or articles would you recommend to create a survey about idle youth?

11 December 2014 7,141 4 View

How to disagree with a reviewer?

Dear all, I have had a couple of experiences answering R&Rs. In general, it has gone smoothly and the reviews have been always reasonable. They always have helped to improve the first draft...

01 January 1970 5,494 12 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 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

Guidelines for survey (question type) analysis?

Hi. Please tell me what guidelines should i need to follow for questionaries' type research work in India. It is not hospital based work, we are conduction basic institutional based qualitative...

03 March 2021 2,037 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 is your perception on using visual analysis or quantitative approaches to evaluate data from single-case research designs (n of 1 trials)?

Results of single-case research designs (i.e., n-of-1 trials) are often evaluated by visually inspecting the time-series graph and computing quantitative indices. A question our research team is...

03 March 2021 687 1 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