Now if you expand their choice set. Say you give them 20 different speed dates, everything goes out the window. Everybody starts choosing in accordance with looks because that becomes the easiest criteria by which to weed out all the options and decide "So who am I going to say yes to?"

The quality of health care continues to improve, and people are living longer, but these developments mean that we're likely to eventually find ourselves in a situation in which we're forced to make difficult choices about our parents, other loved ones, or even ourselves that ultimately boil down to calculations of worth and value.

You know, you take a little infant and you turn on the music mobile on their crib and you find that if you give them a music mobile which turns on automatically versus a music mobile in which - if by chance their little legs or their little hands accidentally touches it - turns on they're so much more excited if by chance it turns on because they touched it, so that desire for control over their environment is... really appears from very early on and if you look at children's first words, "no, yes."

When Japanese went to Hawaii they would go straight and buy the same thing that they would buy in Japan. They just got it cheaper, which they liked. And so they would still eat the red bean ice cream or the green tea ice cream, but they didn't really take advantage of the variety and it wasn't clear that they cared.

I've done a number of studies with speed dating and Match.com and what's interesting is that you know we still walk into a speed dating event, you know, thinking about what it is we're looking for in a mate and so you ask people, like women will say "I'm looking for somebody who is really kind and sincere and smart and funny."

One day I went to the manager and I asked him whether his model was working and he said, "Well, haven't you seen how many customers we have in this store?" And yes indeed I had. I mean it was definitely attracting a lot of customers, even attracting tourist buses that would land up at this store and people would go through the store and marvel at all the options, even sometimes take photographs of the various aisles.

We do the same thing in our own lives, embracing information that supports what we already prefer or vindicates choices we previously made.After all, it feels better to justify our opinions rather than challenge them, to contemplate only the pros and relegate the cons to the back of our minds. However, if we want to make the most of choice, we have to be willing to make ourselves uncomfortable. The question is, if we are willing, how exactly do we go about fortifying ourselves against these biases?