Software (cont.)

SAS DUALDATA (A SAS (SAS Institute, Inc.) application for validating data entry using double-entry techniques. The user defines the variables, enters observations into an initial data set, and then reenters to validate. During validation,each value entered is compared against the corresponding value from the initial data set. If discrepancies occur, the field is flagged and the user is prompted to enter the correct value. The application keeps track of validated observations so that the validation process can span multiple data entry sessions. The application also allows for the possibility that observations may be omitted or duplicated.
Available at: www.npsc.nbs.gov/resource/tools/software/dualdata/dualdata.html