1. Oregon Research Institute, 1715 Franklin Boulevard, Eugene, OR 97403, USA.
2. Department of Psychology, University of Texas, Austin, TX 78712, USA.
3. Department of Psychology, University of Oregon, Eugene, OR 97403, USA.
4. The John B. Pierce Laboratory, New Haven, CT 06519, USA.
5. Department of Psychiatry, Yale University School of Medicine, New Haven, CT 06511, USA.