Belief in luck and luckiness: Conceptual clarification and new measure validation

► A new bidimensional model of belief in luck and luckiness is proposed. ► A series of studies (total n = 1202) test and confirm new model. ► Belief in luck revealed as unidimensional construct relating to irrationality and maladaptivity. ► Luckiness revealed as unidimensional construct related to wellbeing. ► Parsimonious, internationally applicable Belief in Luck and Luckiness Scale validated.