Inclusion Criteria:  Between the ages of 18 and 35 Right-handed Able to provide informed consent Have normal to corrected vision without color blindness Willing to comply with all study procedures and be available for the duration of the study Speak and understand English Participants will be invited back to the second session only if they are able to perform the task. The criteria for demonstrating the cognitive process of interest is that participants must show a benefit to their working memory percent correct during trials with an informative retro-cue relative to trials with an uninformative neutral cue  Exclusion Criteria:  Attention Deficit Hyperactivity Disorder (ADHD) (currently under treatment) Neurological disorders and conditions, including, but not limited to: History of epilepsy Seizures (except childhood febrile seizures) Dementia History of stroke Parkinson's disease Multiple sclerosis Cerebral aneurysm Brain tumors Medical or neurological illness or treatment for a medical disorder that could interfere with study participation (e.g., unstable cardiac disease, HIV/AIDS, malignancy, liver or renal impairment) Prior brain surgery Any brain devices/implants, including cochlear implants and aneurysm clips History of current traumatic brain injury Failure to pass a colorblindness test (For females) Pregnancy or breast feeding Anything that, in the opinion of the investigator, would place the participant at increased risk or preclude the participant's full compliance with or completion of the study