Teams are most effective when they have a high-learning orientation coupled with high team identification because this allows them to form more accurate team goal mental models and effectively plan their processes.

When teams have a high-learning orientation, they are inclined towards continuously seeking new knowledge and improving their skills. Combined with high team identification, they share a sense of belonging and unity towards the team's goals. This allows them to form more accurate team goal mental models and effectively plan their processes, improving their overall performance. Therefore, the statement is true.