Teams are a fundamental part of the way we all work. Understanding the ins and outs of team decision making makes us better employees, better co-workers, and even better people. As developers and testers, we continuously make decisions. Most decisions are based on how the decision maker perceives the information at hand. That perception is driven by many factors including cognitive biases—the mental shortcuts we use that lead us to simplify, make quick decisions, and ultimately mess up when we’re trying to attack new problems. Biases can affect how information is perceived, and how teams and individuals behave. Biases are like optical illusions—we see what we want to see, even when we know better. Learn the cognitive biases that affect team thinking and take away strategies for how your team can work with and around these biases. Finally, discover how psychology can make your team more efficient and effective together.