Something Obvious Missing From This Study

From LiveScience comes this article about a study done at the University of Alberta that "... found a connection between the length of the male index finger relative to the ring finger and the tendency to be aggressive". From the abstract: [...] These results are consistent with the hypothesis that testosterone has an organizational effect on adult physical aggression in men. Nowhere did I see mentioned that the displayed length of the middle finger relative to the remaining fingers on a hand could be reliably used as an indicator of aggression. Tagged as Psychology, Aggression