Figure 5.

Percent change in frequency of back-arching and tail-lashing (arch/lash) displays in response to the front of the mirror (experimental condition) relative to responses to the back of the mirror (control condition). Comparisons were made between males who show high levels of partner-directed aggression (High-aggressive; N = 10) and males who display low levels of aggression (Low-aggressive; N = 10). Percent change in arch/lash displays was trending towards being smaller for High-aggressive males when change in OT concentration from control was negative (t = 1.82, P = 0.09).