Is it possible to tell when an employee is on their way out? An extensive study revealed that you don't need psychic abilities to know when receiving a resignation letter is in your future. Researchers at Harvard Business Review asked nearly 100 managers how the behavior of their peers and subordinates shifted in the months prior to their voluntary departures. Additionally, researchers surveyed 100 employees to find out how their own behavior shifted prior to their own voluntary departures. Behaviors listed were whittled down and distributed the survey to additional groups of managers. Here are the top 8 pre-quitting behaviors, according to researchers.