How predictably irrational are you? The test

Why do we always take what's free, even if we don't really want what's on offer? And why does taking a cash gift from a friend make us feel uncomfortable, while a bottle of good wine is perfectly acceptable?

Most of us would believe that we consistently make rational choices, that we are in control, and that we usually get decisions right. But we often make choices that can only be described as irrational. What's more, it appears we make the same types of mistakes again and again, in a systematic and predictable way.

Test yourself: discover the truth about your decisions