Objective, easy to use, and easy to comprehend assessment methods for measuring shared understanding in teams are hard to find. This paper describes an experiment where a measure called Shared Priorities, which is based on ranking of self-generated strategic items, is assessed. Trained teams were compared to non-trained teams in a dynamic problem-solving task. The maturity of the participating teams was also assessed using a content analysis measure. The Shared Priorities measure was used alongside other well-documented measures of team awareness based on self-rating. Results show that the Shared Priorities measure correlates with task performance and could also distinguish between trained and nontrained teams. However, the Shared Priorities measure did not correlate with the other team measures (cf. CARS - Crew Awareness Rating Scale - and DATMA - Distributed Assessment of Team Mutual Awareness), suggesting that it captures a different quality of teamwork than the self-rating measures. Further, the Shared Priorities measure was found to be easily administered.