Claims have been recently made for a seven-factor model that differentiated performance levels in project teams. We have tested the model with results from a self-report inventory. Forty-four opportunities for data collection were taken and a total of 1103 useable inventories collected from participants across European, A sian and African locations. Teams reported on were predominantly work-related. All seven factors correlate as predicted with leadership and team-performance criteria. We report results supporting the original proposition that team effectiveness, including its creativity, can be interpreted as arising through leadership interventions of a transformational kind, which impact on a set of theoretically-derived team factors.