This is now version 2.1 of the software. This small update adds a correction for alpha reliability coefficients - correcting for restriction of range in a set of observed sample test scores. Click here to download the zipped program installation. The zipped file is now 4.8Mb! in size and is named atten2.zip. The application will work on 800x600, 1024x768, and 1400x1024 screen resolutions. The program contains comprehensive on-line HTML HELP - via a Help button on-screen in the application. The program can be installed in any convenient subdirectory by running Setup.exe from within the zip archive (using say Winzip to open the archive). Alternatively, copy the zip files to a temporary subdirectory and run Setup.exe from there. It works on Windows 95 and upwards operating systems. Installed with the program are two 23-page application/help manuals - one in Ms-Word format, the other a pdf file. These were created from the HTML help file. This is the first revamp of all the "Barrett" software - that uses Delphi-6 and HelpMan v.3.2 software, and some 3rd-party components.