Open-plan offices have been found to reduce productivity and impair memory. They're associated with high staff turnover. They make people sick, hostile, unmotivated, and insecure. Open-plan workers are more likely to suffer from high blood pressure and elevated stress levels and to get the flu; they argue more with their colleagues; they worry about coworkers eavesdropping on their phone calls and spying on their computer screens. They have fewer personal and confidential conversations with colleagues.