ROCstats
An app for simple 2-category ROC analysis
This program is absolutely free, with no limitations, no "extra programs", and no ads or viruses. Click the button below entitled "Download ROCstatsSetup" to download the file to install ROCstats. This file will be named "ROCstatsSetup.exe". It will be in your Download folder. After the download, simply double-click on this file name in order to install ROCstats. This app requires that you be running Windows 7 or later.
It is possible that when you download the installation file that you will get a message from Windows saying that the publisher of the program is unknown so that running this program is potentially dangerous. Please choose to run the program anyway. It is clean. You may contact its aurthor, Dr. Herbert Stenson at stens@uic.edu to check its veracity.
When you run the program you will see an initial page describing it, followed by a data entry page into which you enter a Hit Rate (true positives), a False Alarm Rate (false positives) and an optional Prevalence Probability (the a priori probability that a True State of Affairs, a signal, existed in the experimental trials).
After entering the data you will see a page with two overlapping normal curves for your data and some statistics. Next you will see a graph of the ROC curve for your input data and a calculation of the area under the curve. Last, there appears a page of probabilty tables showing the Positive and Negative Predictive Values for your data. You can scroll back and forth to view the output pages.
Each page of the output has its own Help screen, and error checking by the program makes it almost foolproof. Enjoy!