“…Studies have established the value of not only investigating between-person differences in personality traits, but also investigating within-person fluctuations in personality states (e.g., Fleeson, 2001, 2017; Kuppens, 2015; Wilson & Vazire, 2015), and correlates of momentary affects, behaviors, and cognitions. For example, people tend to feel happier when they are around others and when they are acting more extraverted than usual, even if they are dispositional introverts (Lucas, Le, & Dyrenforth, 2008; Sun, Stevenson, Kabbani, Richardson, & Smillie, 2017; Zelenski et al, 2013).…”