Ask a husband what percentage of the household chores he contributes. Write the number down. Now ask the wife what percentage she contributes. Write the number down. Now add the two numbers together. The sum will almost certainly be more than 100%. Now do the same exercise for a project team at the office. It’s a simple question: how much of the value of the project did you contribute? If you sum up all the answers, the total is likely to be greater than 200%. How can this be? Our memories work in funny ways. To manage a team effectively — and to stimulate innovation — you need to praise based on memory rather than reality. Learn more in the video.