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In the context of occupational health psychology, personality has usually been depicted from the perspective of single traits, dispositions, or their combinations. However, there is a clear need to better understand personality as a whole. For this reason, an integrative framework of personality is presented in order to give a more comprehensive and cohesive picture of how the different personality constructs relate to each other. In recent years, several holistic models of human personality have been presented. For example, such models have been formulated by Dan McAdams (1995), Brian Little (2007), Robert McCrae and Paul Costa Jr. (1999), and Brent Roberts and Dustin Wood (2006). In this chapter, we briefly introduce one of these models, that is, the three-tiered conceptual framework of personality by McAdams and his colleagues (McAdams, 1995; McAdams & Adler, 2006; McAdams & Olson, 2010; McAdams & Pals, 2006). This comprehensive and multifaceted model conceptualizes human personality via a developing pattern of (1) dispositional traits, (2) characteristic adaptations, and (3) constructive life narratives (see Fig. 1). Each of these three levels possesses its own characteristics for describing and understanding personality.

Simon L. Albrecht is a registered psychologist and has a PhD and a master’s degree in Organizational Psychology. Simon’s PhD focused on identifying the dimensions, antecedents, and consequences of organizational trust. Simon is a Senior Lecturer within the Organizational Psychology program at Deakin University, Melbourne, Australia. Teaching, research, and practice interests are in the areas of work engagement, organizational development and change, leadership development, culture and climate, and organizational politics. Simon has published in numerous international journals, has numerous book chapters in print, and has presented at international conferences. In addition to his academic and research interests Simon also has considerable consultancy experience. He has previously been a director of a human resource consultancy engaged in delivering a broad range of organizational development activities and programs.

Torbjörn Åkerstedt, Ph.D. in psychology, 1979, is professor of behavioral physiology at Stockholm University and director of the Stress Research Institute, affiliated to Karolinska institute. He has been President of the Scandinavian Research Society, the European Sleep Research Society, and Secretary General of the World Federation of Sleep Research and Sleep Medicine Societies. He has published more than 200 papers in peer-reviewed journals. The focus of his work has been on sleep regulation, sleep quality, sleepiness and risk, effects of shift work, and stress on sleep and sleepiness.