I have been wanting to write a book review on Dan Ariely’s excellent book Predictably Irrational for a while now. Instead I will just say that is is a fantastic book that is absolutely worth reading for anyone and especially any designer and link to a few Ted Links.
A blog post on Ted by Dan Ariely about behavioral economics:http://blog.ted.com/2009/05/dan_ariely_2008.php
And two talks that cover some of the fundamentals of the book: http://www.ted.com/index.php/talks/dan_ariely_asks_are_we_in_control_of_our_own_decisions.html and http://www.ted.com/index.php/talks/dan_ariely_on_our_buggy_moral_code.html
All I can really say is that this book has given me a language to talk about and data to back up my long held skeptics about rationality.