3 You've just come up with a great idea for improving productivity and morale in a shop that silk-screens t-shirts for local bookstores. Your idea is to allow employees to work four 10-hour days if they want instead of the normal five-day/40-hour week. With the added time off, you reason, they'll be happier and more productive while working. But your boss isn't so sure. "Show me some evidence', she says. Can you design a research study that can be done in the shop to show whether your proposal is a good one?