I love people-watching. As a trainer, of course, I have ample opportunity to do so. While groups are completing roleplays or activities, it’s my job is to observe their body language patterns and communication habits. Many years of closer observation have brought my attention to a problem which creates ‘glass ceiling moments’ for female negotiators. Here’s what I’ve noticed, when women step into senior roles, body language patterns that previously helped them in negotiation begin to backfire. For example, patterns of smiling frequently often can help a woman be successful in a junior role. When she’s attempting to negotiate as a leader, however, smiling too often will reduce her credibility and be perceived as an anxious habit.