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Sites: The social psychology network has a page for posting online social psychology studies. There are a range of requirements. In particular, it needs to be closely related to social or personality psychology. SampleSize Subreddit is a community dedicated to completing surveys. They like it when results will be provided at study completion. It has close ...


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After I had finished writing my master's thesis in 2015, I decided to (try to) tackle the problem of small sample sizes with a new approach. The goal was to develop a website that allows everyone to post their empirical study (online survey or experiment) and to find additional participants based on the principle of voluntary and fair mutual support. The ...


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Determining sample size for an animal experiment is no different than in research with human subjects. What you need to know is the effect size, the significance level and the power (which is the probability that the test detects a significant effect assuming that there is one). The tricky part is getting the effect size (for an interesting discussion have a ...


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It is partly as you already guessed, because the phenomena that are studied don't vary as much between individuals. This doesn't necessarily mean that individual differences in perception are smaller, it means that individual differences in those aspects of perception that are studied in psychophysics are smaller. Another reason is that it is customary in ...


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A relatively new site for subject recruitment online is Prolific Academic. It is a Mechanical Turk competitor targeted at the academic market. It offers some features that mturk doesn't that may be useful for researchers, such as more in depth pre-screening and demographics information. A potential negative of the site is that they currently require a ...


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In my opinion, Psychforums.com is by far the best place to post online studies, but your school/university needs to establish a partnership with them first. Best is to speak with your professor or someone responsible for your Psychology department in order to have that partnership in place, which is in fact really easy (see the post before). Once done, all ...


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Psych Forums has a section for posting studies to a section of their forum. However, they do require some form of payment for posting. In fact it's not exact. As explained here : http://www.psychforums.com/surveys-studies/topic44450.html if you are a "professor/researcher/student in a university/college/institute/faculty of psychology" it's entirely free ...


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This depends heavily on what sort of study you are trying to do, but I know of a number of cognitive science and computational linguistics studies in the past several years that have used Amazon's Mechanical Turk to run subjects online. As an example from behavioral economics, see Paolacci, Chandler, and Ipeirotis, "Running experiments on Mechanical Turk", ...


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Short practical answer for a signal to be properly sampled, it has to be done [at] the Nyquist sampling rate Up front: sampling at the Nyquist frequency is the bare minimum rate to reproduce the frequency of the input signal. Dependent on your demands, I would advise to go at least 2 times that, if not more, to reproduce amplitude and shape of the signal....


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Here is the 10 KHz signal (the maximum frequency of the signal is 10 KHz): Now, if we sample the signal at 5 KHz and 10 KHz, the signal will look like as shown below (the brown points): It is clear that we can't get any useful information from the sampled signal. Now, to get some information about the signal, Nyquist said that we must sample the signal ...


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TurkPrime.com offers many features for using MTurk through a web interface. You can exclude and include workers, email them, restart survey and more. You can also create an account with SurveyComet.com if you do not reside in the US to find workers for surveys that you want to run. You can limit the workers by demographic which I have found to be extremely ...


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I found Cognilab. At time of posting they are in beta. It appears to be specifically marketed at academic social and behavioural scientists. They appear to aim to handle participant recruitment: Crowdsource your research experiment using Amazon Mechanical Turk: Cognilab uses an online crowdsourcing marketplace to recruit from over 500,000 participants....


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