dd2es <dd2es <at> virginia.edu> writes: > > I am looking for (or interested in writing) a function that calculates Az, > an alternative measure of discriminability from SDT (alternative to d', Az). > I have written my own functions for d', A', B"d, and am aware of the 'sdtalt' > package, but I have yet to find a way to calculate Az, since it require the > phi operator.
The Phi --- not Psi, see the paper --- function is simply the cumulative normal distribution, so you can use pnorm() instead. -- Hans Werner > For a relevant paper/discussion (and formula), please see Verde and > McMillian, 2006 (Measures of sensitivity based on a single hit rate and > false alarm rate: The accuracy, precision, and robustness of d', Az, and Az) > > Any help on this would be greatly appreciated! > > David Dobolyi > Graduate Student > Cognitive Psychology > University of Virginia > ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
