Lowen, StevenLukas, Scott2009-08-042006Lowen, Steven B., and Scott E. Lukas. 2006. A low-cost, MR-compatible olfactometer. Behavior Research Methods 38(2): 307-313.1554-35281554-351Xhttp://nrs.harvard.edu/urn-3:HUL.InstRepos:3203253We present a design for an olfactometer, suitable for fMRI experiments, that can be constructed at extremely low cost. The olfactometer presents odors directly to the nose via a nasal cannula at unobtrusively low flow velocities, with no large assemblies required on or near the subject's face. The olfactometer can be controlled manually, or by computer via a serial interface. A validation study verified that the olfactometer reliably presents odors to test subjects. Errors and response latency times decreased with increased flow rate in an orderly manner, as expected.en-USJournal Article10.3758/BF03192782