The goal of this study is to learn more about how people who smoke cigarettes respond to rewards, such as winning money, under different conditions. The study uses a method called functional magnetic resonance imaging, or fMRI, which is a research method for measuring activity in the brain. In this study, we are using fMRI to measure how brain activity changes in people who smoke when they receive rewards. The fMRI measures are collected during two separate visits. Participants are also asked to fill out questionnaires and complete computer tasks while in the lab. In addition, the study involves measuring thoughts and behaviors in people who smoke in real life by asking them to fill out surveys on a smartphone. Participants are asked to carry a smartphone for a total of 10 days and answer several surveys throughout each day. In order to be eligible for the study, individuals must be between 18 and 55 years old and you must smoke on a daily basis.