A1) The Decision Aid: Making a Decision about Colon Cancer Screening, a decision aid designed forpatients aged 75 and older, was developed and tested in paper form between December 2005 and December 2007. Six versions, targeted by age group and gender, were created and tested at the Cecil G Sheps Center for Health Services Research in conjunction with the Lineberger Comprehensive Cancer Center. A2) Decision to Convert to Computer: The decision to convert this existing decision aid to a computer-based format was based on a two-fold reasoning structure. First, with the oldest of the Baby Boomers reaching their 60’s, computer programming with emphasis on the older users is becoming more important. Several theories of likelihood of technology use for health education cite as two of the constructs perceived usefulness and perceived ease of use. As the population of older computer users transitions into one with more computer experience, the likelihood of use of computer-based tools will increase. Secondly, a computer-based system can tailor information more specifically per patient with less possibility for error. Beyond the six different versions based on age group and gender, algorithmic programs imbedded in the interface can be utilized to tailor information to much more specific variables, resulting in a large number of slightly different versions that would be impracticable on paper. A3) Development of the Interface: Theories of computer interface development, health education, and concerns regarding age-related decline in fine motor control and visual acuity informed our design of this computer interface. We utilized Adobe’s Flash CS3 to realize our design.