Table 1.

Main study exclusion and inclusion criteria

Exclusion Criteria

Inclusion Criteria

• Hearing problems or use of a hearing aid • Color blindness • Motor control problems • Psychotropic medication • Current depression or anxiety, or occurrence of depression/anxiety within 5 years • Concussion with unconsciousness for 5 min or more • Pregnancy or attempting to become pregnant • More than 4 alcoholic drinks per week for women, more than 6 for men • History of drug or alcohol abuse or addiction • Weight greater than 250 pounds • MRI incompatibility (claustrophobic, foreign metallic objects, pacemaker, etc.)

• Age 18–29 years or 65 years and older • Right-handed • Native English speaker • Healthy (i.e., no debilitating conditions, mental illness, or head trauma)