Lovatt and his team observed the dance floor closely and took certain dancers aside for a solo performance. Those selected groovers were then filmed for 30 seconds on a separate dance floor which was, according to Lovatt, "just as lively and noisy as the main dance floor." Then the team headed back to the lab with their videos.

Lovatt then applied a filter to the footage so that the dancers could only be seen in silhouette, which meant that any viewer had to focus solely on their movements. He showed these films to students, who had to rate the dancers on a five-point scale from "very attractive" to "very unattractive."

The results showed that women gave the highest attractiveness ratings to men with the highest levels of prenatal testosterone. The men with the lowest testosterone in turn got the lowest attractiveness ratings. "Men can communicate their testosterone levels through the way they dance"...