This study evaluated quasi-static pediatric shoulder girdle complex responses through noninvasive displacement measurements. These data will be used to evaluate the Large Omnidirectional Child (LODC) anthropomorphic test device (ATD) shoulder design. The shoulder girdle complex influences upper body movement during frontal impacts as it engages with the shoulder belt, affecting the movement of the head and spine. The recently developed LODC ATD was designed with flexible shoulder girdle structures that capture the unique kinematics in pediatric populations (Stammen et al., 2016). However, this ATD has not been evaluated for biofidelity in this region due to the lack of biomechanical data available on pediatric shoulder responses. Therefore, these data must be obtained to evaluate, and, if necessary, improve the biofidelity of the LODC ATD. Shoulder range of motion and anthropometric measurements were obtained from 25 pediatric volunteers, ages 8-12 years old. Loads were applied bilaterally exclusively to the shoulder complexes in increments of 25 N up to 150 N per shoulder at 90 and 135 degrees of shoulder flexion. Still photos were used to determine shoulder displacement in the sagittal plane from images captured prior to and following the load applications. Data analysis included the absolute and relative displacement of the tracked anatomical landmarks of the acromion and T1. For the 90° load, the acromion moved relative to T1 an average of 27.8 mm forward and 3.2 mm upward at maximum displacement. For the 135° load, the acromion moved relative to T1 an average of 11.6 mm forward and 38.6 mm upward at maximum displacement. Similar displacement values at higher loads indicated that the subjects achieved their maximum range of motion. The results of this study will be compared to the LODC ATD, assessing the biofidelity of the shoulder complex.