[JustSayNoToNannies]

My guess is their studies are on people who do not regularly carry a concealed weapon.

Sure enough, the paper she linked studied 18 undergrads with no indication that the authors even considered degree of familiarity with firearms - so odds are none of the previous studies cited did so either (or else these authors would have followed in those footsteps).

Good call! Bad science.

[JustSayNoToNannies]

The “Weapons Effect” hypothesis suggests that guns can psychologically control people and cause them to be violent. In this article, Paul Gallant and Joanne D. Eisen analyze previous research about the weapons effect and examine more recent studies to test their agreement with the hypothesis. The authors conclude that evidence does not support the “Weapons Effect” hypothesis