Neural Representations of Memory Transformation (MEM_TRANS)

Inclusion Criteria: * Age 18 years or older (80 of the final sample will be ≥60years of age) * Cognitively unimpaired, ambiguous, or mildly impaired cognitive function, defined as a score of ≥18 in the Montreal Cognitive Assessment (MOCA). * No previous stroke, brain tumor, neurodegenerative disease, or trauma to the head * Ability to give consent for study participation * Ability to perform a computer task requiring responding to visual cues and typing on a standard computer keyboard with both index and middle fingers for 30 minutes daily. Exclusion Criteria: * Inability to use both index and middle fingers to type on a standard computer keyboard * Dementia defined as a score of \<18 in the Montreal Cognitive Assessment (MOCA) * Uncorrected vision, hindering perception of visual cues presented on a standard computer screen * Medication use at the time of study that may interfere with learning, including but not limited to carbamazepine, flunarizine, sulpiride, rivastigmine, and dextromethorphan. * Neuromuscular disorders that affect fine motor control of the hands. * Presence of neurological or psychiatric disorders * Presence of scalp injury or disease * Prior intracranial surgery * Prior brain radiotherapy * Prior history of intracranial tumor, intracranial infection, or cerebrovascular malformation * Metal in the head or neck * Contraindications to MRI (such as severe claustrophobia, implanted medical devices)