I have been loaned Wiser: Getting Beyond Groupthink to Make Groups Smarter, a new book from Cass Sunstein and Reid Hastie. This book aims to explore reasons why group decision-making can go wrong and offer suggestions for improving the decision-making performance of groups. I am only just now starting to read it but, if I can judge a book by its introduction, it promises to be an interesting read.

From page 3:

You can also increase wisdom within a group or a firm by cultivating certain social norms that redefine what it means to be a team player–not to go along with the group, not to engage in happy talk, not to show unqualified enthusiasm for the boss’s demonstrable brilliance, but to add new information.

And page 15:

The principal focus [of chapter one] is on how groups may fail to obtain important information–and on how their leaders and members tell dissenters, or people who have a different perspective, to shut up.