[1] Univ Calif Berkeley, Dept Psychol, 2121 Berkeley Way, Berkeley, CA 94720 USA
[2] Stanford Univ, Dept Psychol, Stanford, CA USA
[3] Mayo Clin, Dept Quantitat & Hlth Sci, Scottsdale, AZ USA
[4] Georgetown Univ, Dept Psychol, Washington, DC USA
[5] Univ Calif San Francisco, Memory & Aging Ctr, Dept Neurol, San Francisco, CA USA
[6] Care Daily Co, Palo Alto, CA USA