Wouldn't there being more women make it harder to demonstrate violent tendencies - i.e. if they only interviewed two women it would only take one of them to being violent to be able to state that 50% of female interviewees were violent?
It depends what you're trying to prove or disprove.
This study was set to disprove, sorry test male control theories.
In summary, the overall aim of the current study was to test several predictions derived from contrasting ap- proaches to IPV. Following initial investigation of sex differences in both IPV (between heterosexual couples) and aggression towards same‐sex non‐intimates in the same sample, we investigated whether men would show lower levels of physical aggression to partners than to same‐sex non‐intimate opponents, and whether women would show higher levels to partners than to same‐sex non‐intimates.
Given the sample sizes, the aim of the study and the fact that Dr Elizabeth Bates has built a career based on male victims of DV by female perpetrators, I'm sorry but I'm a bit dubious in regards to her findings as well as the way it has been presented in the media.
After all, what her study actually proves is that men are more violent to other men rather than female partners and women are less violent towards other women rather than male partners.
Which apparently translated into women are as violent and controlling as men , if not more. Then surprise, the number of women interviewed was 300 more than the men.