Executive function plays a vital role in PF, controlling self-regulation abilities \citep*{Baumeister_2002}, with better functioning resulting in adopting top-down strategies and being flexible when responding to environmental demands, as opposed to recruiting default strategies that may not be useful or applicable across varied situations \citep*{Fleeson_2001}. Executive function also influences the way in which negative emotions are evaluated, and memory and recall, subsequently influencing the ability to mentally represent situations \citep*{Kashdan_2010}. When linking executive function, PF and mental health, rumination (an inflexible response style) has found to play a key role in the symptomatology of depression \citep*{Nolen_Hoeksema_2008}, along with explanatory inflexibility (applying the same attribution style cross different situations) and inflexible coping behaviour \citep*{Fresco_2006}\citep*{Moore_2007}.