The present article describes a portable version of the go/no-go association task (GNAT) that runs on Palm Pilot and Handspring personal digital assistant (PDA) devices. The PDA version of the GNAT was modeled after a portable version of the Implicit Association Test (Dabbs, Bassett, & Dyomina, 2003) and was designed to facilitate measurement of implicit social cognition in field settings and among difficult-to-reach populations. The PDA version of the GNAT was used to assess implicit attitudes about smoking among 11 smokers and 28 nonsmokers. Support for the validity of the PDA version of the GNAT was provided by findings that smokers showed less negative implicit attitudes toward smoking, as measured by the GNAT, than did nonsmokers and that these implicit attitudes were positively correlated with self-reported smoking attitudes among both groups.