September 2003: to halve and hold forever (?)
An ability to create random samples of data records was added as an option under the Run menu. This will be useful, if not to the whole world, then to those who might use Lertap as a precursor to some subsequent analyses, such as, perhaps, IRT modelling. To ignore this revision, do not click here.
And, late in the month the way The Spreader operates was changed.