experienced health), cognitive functions (general cognitive capacity, spatial ability, memory, executive functioning, attentiveness, perceptual speed, motor dexterity, and social cognition as measured with ability to recognize emotional facial expressions), and work. The assessments were completed on 1,347 twins (73% of target sample), of which 812 were seen in person (with neuropsychological testing) and the rest by telephone psychiatric interviews, mailed questionnaires and DNA collection (n=1,295) from blood and/or saliva samples. We have also sent a questionnaire to those not part of the intensive cohort, and this data collection was just completed.
