Modern psychology recognises five dimensions of personality: extroversion, agreeableness, conscientiousness, neuroticism and openness to experience. Previous research has shown that people’s scores on these traits can, indeed, predict what they purchase. Extroverts are more likely to respond to an advert for a mobile phone that promises excitement than one that promises convenience or security. They also prefer Coca-Cola to Pepsi and Maybelline cosmetics to Max Factor. Agreeable people, though, tend to prefer Pepsi, and those open to experience prefer Max Factor.
People are, of course, unlikely to want to take personality tests so that marketing departments around the world can intrude even more on their lives than happens already. But Dr Haber thinks he can get around that—at least for users of Twitter. He and his team have developed software that takes streams of “tweets” from this social medium and searches them for words that indicate a tweeter’s personality, values and needs.
