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I cannot tell you why they chose four cards, but I do know that it is perfectly fine to use three, (e.g. Niv and colleagues, 2015). To give you more info on why the WCST is used in the study by Niv. The study wanted to see how you could best model learning (and relearning) multidimensional information, to be able to better understand how people make sense ...


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The Gf/Gc Quickie Test Battery (Stankov, 1997) is a one-on-one administered intelligence test. It is designed for teaching purposes, but has been used in research. The Gf/Gc Quickie Test Battery is a collection of tasks used by psychologists to assess human cognitive abilities. It is derived from within the framework of fluid and crystallized ...


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My understanding is that in general a percentage correct of 50% is optimal where there is no scope for guessing. However, on multiple choice tests there is a certain number of response options. Thus, the probability of getting the correct answer if you know nothing, is one over the number of response options. In this case I believe that the optimum is: $$1/...



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