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4

If n != m then it will not home in on the 50 % threshold. In these simple N-up/N-down staircases, you can modify either the stepsize (as you proposed) or the number of successes/failures to act as a criterion for upgrade/downgrade. A comprehensive introduction to these staircases and the effect of changing these properties can be found in this paper. The 80 ...


3

I found a paper called Summary statistics in auditory perception (McDermott, Schemitsch & Simoncelli, 2013) that might be relevant to your question. If you can't access it in full, you can a great description of the paper here. Please note that I'm writing about it from memory and that some details might not be correct. The authors had a task where ...


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It generally helps to provide some sort of specification as to how well you want to control the timing. There are 4 orders of magnitude difference between the 100 ms timing accuracy required for auditory and visual stimuli to be judged simultaneous (Zampini et al. 2005) and the 0.1 ms timing accuracy required for binaural stimuli to be judged simultaneous ...


2

I guess it depends on your purpose. If you are doing the MDS for more heuristic purposes, then often two dimensions (or possibly three) will provide the greatest visual insight. Also, my sense from looking at your dimension by stress plot is that the greatest gains are attained when going from one to two dimensions, that the gain from two to three ...


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For these types of questions I really like Detection Theory: A User's Guide by Macmillan and Creelman. They consider 3 types of bias. The criterion location c is calculated relative to the zero-bias point and expressed in units of standard deviations, such that a c of 1 means the criterion is 1 standard deviation to the right of the zero-bias location and a ...


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I'm not completely sure what you ask. I give my comment as an answer, because there is more space here. I'll delete it, if you feel I'm off the mark. As far as physical theory goes (and I understand it), sound is the movement of air molecules and the resulting fluctuation in density. Measuring these density fluctuations and representing them in numbers ...



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