Procedures and results are described in this volume as well as the rationale for determining the constitution of the advanced adult-dummy family and for sizing its members. Based on the study's selection criteria, volunteers from the local area were recruited for use in collecting anthropometric data that describe the seated posture, position, shape, and size of seated vehicle occupants. Data were collected in three separate measurement sessions:​ (1) measurement of subject in-vehicle position, (2) establishment of seat/subject interface contours in laboratory vehicle seat bucks, and (3) collection of seated anthropometry on subjects seated in contoured reference hardseats. The contoured seats were determined and fabricated for each of the three subject-size groups by combining seat contour data for subjects seated in vehicle seats from four different vehicle models. Surface landmark coordinates and seat contour data were determined using stereophotographic and film analysis techniques. Summary statistics of data collected are presented and the process of using these data to fabricate three epoxy/fiberglass dummy shells is described. Volume 1 also contains a summary o f the data presented in Volumes 2 and 3, which describe the procedures used in developing the anthropometric specifications and contain more detailed results.