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Questions tagged [sampling]

For questions regarding the proper selection of subjects for a scientific experiment or survey, accounting for both demographics and population size

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How to determine the sample size for a Confirmatory Factor Analysis CFA

I'm in the process of developing a scale. Overall, my question is how do I determine how many participants to include in my sample for the first Confirmatory Factor Analysis procedure? More ...
stephan_phd's user avatar
2 votes
3 answers

What is the name of the tendency to portray oneself in the positive light?

I know it exists and it has a name... But my google-fu skills are lacking, due to a pretty niche concept that uses a lot of generic keywords. There is a fallacy / mental model / a tendency for people ...
Mars Robertson's user avatar
1 vote
0 answers

What to consider when subsampling

I have a dataset of 364 people in a control group population and about 450 in one comparison group sample and 150 in another comparison group population. We're doing a full analysis of these data. We'...
Amy's user avatar
  • 11
1 vote
0 answers

Where can I find Data set for Machine Learning purposes?

I am currently doing a research in the attempt to detect onset sign of mental disorders through facial recognition. In order to do that, I would need training dataset which contains 1. Pictures 2. ...
Vidiskiu Fortino K's user avatar
1 vote
0 answers

How can I argue the year range for a sample?

I’m writing a thesis about alexythimic levels based on emo-stroop test results. What could be a good age rate sample? What would be the reason to say I will exclude subjects younger and older than X? ...
Zumo de Vidrio's user avatar
4 votes
2 answers

What happens at sampling rates lower or higher that the Nyquist rate?

I do understand that for a signal to be properly sampled, it has to be done on the Nyquist sampling rate. What I do not understand is, what happens at sampling rates lower rate than the Nyquist rate, ...
wokoro douye samuel's user avatar
5 votes
1 answer

Why so few subjects in psychophysics?

Why is it that most psychophysics experiments only use a handful of subjects (typically around five, but sometimes even four, three or two), whereas the "norm" for experimental psychology (assuming a ...
z8080's user avatar
  • 919
2 votes
0 answers

Where to recruit paid participants for online Inquisit experiments?

My team and I are trying to use Inquisit for a reaction-time based experiment looking at attentional bias. However, with the no download policy on Mturk and CrowdFlower, we don't know a good site to ...
Michael's user avatar
  • 29
11 votes
3 answers

Are there third party providers of Mechanical Turk psychology experiment services?

For various reasons it can be difficult to run a Mechanical Turk experiment (i.e., you don't have the technical expertise, you don't reside in the United States, etc.) Have any third-party providers ...
Jeromy Anglim's user avatar
16 votes
7 answers

Where to post online psychology studies for participant recruitment?

A common challenge when running psychological studies is getting enough participants. Of course, there are many general strategies for recruiting participants, but I was specifically interested in ...
Jeromy Anglim's user avatar
5 votes
1 answer

How is sample size determined in animal research?

In human research, we define our universe and estimate the effect size we expect to observe, then we can draw the a sample of a given size. How is sample size determined for experiments in the animal ...
Henrique Gomide's user avatar
2 votes
1 answer

How to design research participant recruitment flyer to maximise participant response?

I often supervise student research projects. Often these projects involve recruiting participants by placing one page flyers in strategic locations. The most common scenario is that the flyer is ...
Jeromy Anglim's user avatar