Demographics.

Study non-completion: For the Mind Frontiers group, 1 dropped out during training due to scheduling issues and 3 were disqualified during pre-testing due to exclusionary criteria. For the Active Control group, 3 were disqualified during pre-testing due to MRI exclusionary criteria, and 5 were disqualified due to scheduling difficulties during pre-testing or at the beginning of training. Shown in the second row is the number of subjects who completed the study. The following rows show demographic information for this remaining sample of participants. Mean, standard deviation (in parentheses) and range are shown for age and years of education. Age and years of education did not differ between groups (p>.4).Demographics.