“…Research also showed that experienced fire fighters showed less threat-induced freezing than inexperienced fire fighters, which suggests that people can get used to dealing with threat and probably feel less threatened (Ly, Roijendijk, Hazebroek, Tonnaer, & Hagenaars, 2017). At the same time, reduced freezing has also been found in people with PTSD and borderline personality disorder (Adenauer, Catani, Keil, Aichinger, Neuner, 2010;Fragkaki, Roelofs, Stins, Jongedijk, & Hagenaars, 2017;Stoffels, Nijs, Spinhoven, Mesbah, & Hagenaars, 2017), which is likely explained by increased hyperarousal and vigilance that tends to attenuate freezing (see also Ly et al, 2017).…”