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Firmin et al. (2008) tested the validity of a handful of online IQ tests by having college students complete IQ tests at three different websites and also complete a validated lab measure, the Reynolds Intellectual Assessment Scales (RIAS). They found that there were moderate correlations ($r$ values were around 0.4 to 0.5) between some of the online tests ...


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There are a few factors that could contribute to differences between online versus in-lab reaction time measurement. Hardware variation Participants in an online experiment will use their own computers to complete the task, which will result in lots of variation in hardware. Many studies have looked at how hardware variations affect response time ...


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List presented alphabetically Cambridge Brain Sciences (cambridgebrainsciences.com) Several "brain-training" type experiments including span tasks, mental rotation, and paired associate memory. Some tests require free registration on the site to complete. Data from the tests may be used for research purposes. Created by Adam Hampshire and Adrian Owen at ...


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Amazon Mechanical Turk is perfect for something like this. In fact, tagging content is one of their default project types, so you should be able to just load in your images and use their template for tagging. If you haven't seen it before, MTurk is basically a labor marketplace for very small tasks. It works best for paying people a few cents to complete ...


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We cover a discussion on this in an article we've submitted for peer-review. Here is the preprint. I will cite this stackExchange question/answers in the manuscript (post peer review now) as there are some lovely discussions going on, and doubtless, more to follow. Tangentially relevant to this discussion is a simulation we did in the paper exploring how ...


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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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Inquisit is a tool for running online psychological experiments. It has a huge task library. A quick look says that they have: 6 different stroop tasks. E.g., http://www.millisecond.com/download/library/Stroop/FoodStroop/ N-back http://www.millisecond.com/download/library/NBack/ Heaps of IAT examples: ...


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I believe it has to do with two main factors: 1) Emotional response to one of the topics Consider the case where a webpage or paragraph of text contains multiple topics. Each one with different emotional response from the reader: Topic 1: X____| Topic 2: XX___| Topic 3: X____| Topic 4: XXXXXXXXX Topic 5: XX___| Where the number of X's is how strong the ...


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I've been developing stato.de, an online platform to run HTML5/Javascript experiments, recruit participants via email, Facebook, or Twitter, and collect and evaluate results in real time on any web browser. Please see Mental Rotation for a demo that works on phones, tablets, and desktops; it does not require signup.


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Depending on how you collect the data, reaction times collected "online" will likely be different from those collected "on-site". When considering reaction times, it is important to decide if the reaction time is being used as a trigger, as the time to a response, or the difference in the time to response. Consider an experiment which displays a random ...



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