Something Dr. Harper fails to acknowledge (perhaps, he hasn't noticed it?) is that one sample of his is recruited from a community which appears to be marketed primarily to criminals, particularly, abusers.

Despite this being the case (and quite relevant), this is not noted anywhere, and it is merely described as a "help seeking community".

This might lead to someone erroneously concluding that the nature of it is merely "clinical" or a "mental health circle", and it might lead someone to presume that there are more criminals than there really are (or other negative implications).