High School Activity data, coded from 1957 yearbooks has been updated by re-checking and cleaning of the data and by adding ~3500 cases that were not available at the time of the previous release. An earlier version of these data using variables named yrbook01-yrbook102 has been archived.
Graduate Spouse IQ was coded for the subset of current spouses who participated in the 2003-04 spouse data collection effort.
Sibling Spouse IQ was coded for the subset of current spouses who participated in the 2003-04 Sibling spouse data collection effort.