 Twenty young adults aged 18-38 and 20 older adults aged 60-80 will perform the EEfRT while fMRI data are acquired. To quantify brain activity associated with reward wanting, the fMRI activation will be measured while participants view information about reward probability and choose to perform the easy or hard task, with greater reward associated with the hard task. The investigators will measure activation during presentation of reward magnitude to capture brain activity associated with reward liking. Participants will also complete a brief cognitive battery and anhedonia questionnaires. 