Andy Grayson tracks down some confounding variables
At the entrance to your local supermarket you see a notice asking for volunteers to take part in a taste test. To the left of the notice is a person sitting behind a desk. Being a psychology student, you think this might be interesting. You tell the person you would like to take part and they thank you and give you two identical-looking, but different, drinks to taste. You’re not told anything about them, other than that you should express a preference for one or the other. In one cup—labelled ‘L’—is a sugary, sickly cola drink. In the other cup—labelled ‘S’—is a an identical-looking, but different sugary, sickly cola drink. You don’t like either, really. But you indicate that, of the two, you prefer ‘S’.
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