 This protocol addresses the first phase of a larger project funded by the Patient-Centered Outcomes Research Institute to help heavy smokers make informed decisions about lung cancer screening with low-dose computed tomography CT. A separate IRB protocol will be submitted for the larger, comparative study. In this initial development phase, our prototype patient decision aid will be updated to reflect current guidelines about lung cancer screening. The updated aid will then be pilot-tested in a new sample of patients. In addition, several of the study measures will be refined and further developed in preparation for the larger study. 