Assessing the Long-Term Stability of the Spielberger State-Trait Inventory Trait Scale over 3.5 Years. - Klingelhöfer-Jens, Maren; Reiser, Franziska; Brandt, Naemi D.; Schümann, Dirk; Gamer, Matthias; Kalisch, Raffael; Sommer, Tobias; Lonsdorf, Tina B. (Journal of Personality Assessment, 2026)