Inclusion Criteria:  Age: 60 - 80 years Right handedness  Exclusion Criteria:  Neurodegenerative neurological illnesses, epilepsy or history of seizures Severe and untreated medical conditions that preclude participation in the training, as determined by responsible physician History of severe alcoholism or use of drugs Severe psychiatric disorders such as depression (if not in remission) or psychosis Contraindication to tDCS application