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DUALDATA is a SAS (SAS Institute, Inc.) application for validating data entry using double-entry techniques. The application is designed with the non-SAS programmer in mind and does not require manipulating SAS code to tailor the application to a particular data set. 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.

To use the program, you must have base SAS and SAS/FSP software version 6.08 or later. The program was developed using SAS Version 6.08 for Microsoft Windows, but should work with any operating system. We have used it successfully with SAS versions 6.08 and 6.10 for OS/2.

Shaffer, Terry and N. Paige Groninger.  1995.  Double data entry for novice 
     users.  Pages 1111-1116 in Proceedings of the Twentieth Annual SAS 
     Users Group International Conference.  SAS Institute Inc., Cary, NC.  
     1554pp.  

Shaffer, Terry and N. Paige Groninger.  1995.  Double data entry for novice 
     users.  Jamestown, ND: Northern Prairie Wildlife Research Center Online.
     http://www.npwrc.usgs.gov/resource/methods/dualdata/index.htm
     (Version 16JUL97).

dualdata.zip (58K) -- Double Data Entry Program