Furthermore, Cain contends that workplace productivity suffer when extroverts innovation and are valued more than introverts. In fact, research indicates that brainstorming in groups results in lower quality ideas, whereas there is a strong link between solitude and creativity. In general, open office plans reduce concentration, lower productivity, and make it difficult to retain good employees. "Our most important institutions a designed for extroverts. We have a waste of talent," says Cain