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5 powerful nudges that influence human behaviour

Consider the following puzzle: A bat and ball cost £1.10. The bat costs one pound more than the ball. How much does the ball cost? The number that many people arrive at is 10p, dividing up £1.10 neatly into £1 and 10 pence. However, the correct answer is 5p (if the ball costs 10p then the total cost will be £1.20 - 10p for the ball and £1.10 for the bat). Now consider another question: How many animals of each kind did Moses take into the ark? This question is commonly referred to as the ‘Moses Illusion’. Moses took no animals into the ark; Noah did. The incorrect answers many people give to these questions offers just a glimpse into the overwhelming evidence that indicates that one of the underlying assumptions of social science, that humans are generally rational and their thinking normally sound, is flawed. Many of us believe that we know…