But that’s not the experiment that’s being conducted.<p>The question you ask is whether people are able to identify their own horoscope, not whether they think the horoscopes are correct, i.e. they might well believe that on a 1 to 10 scale their horoscope is a 7, but if they then also score all the others at 7 (on average) then the horoscope had no predictive power. Basically, all the other horoscopes act as a control. It’s a quite elegant setup.