https://www.selleckchem.com/products/XL880(GSK1363089,EXEL-2880).html How chief executive officers (CEOs) use their leisure to help respond to the demands of their job is important for themselves, their employees, and their organizations. This study shines light on this hardly explored subject by focusing on CEOs of major US companies and their "serious leisure," the goal-oriented pursuit of a non-work passion. Serious leisure is increasingly practiced by the population at large as well as by top leaders. This study is based on 16 interviews with "serious leisurite" CEOs of Fortune 500, S&P 500, or comparable organizations. Novel insights are brought into the ways in which CEOs believe their passionate non-work pursuit supports not only coping with the strain of the top job but also optimal functioning in it, as well as into how they perceive the demands of the CEO role. This work contributes to research on leader personal resources and leader effectiveness, executive job demands, as well as to the leisure-based recovery literature.Narcissistic personality (NP) has recently attracted a great deal of attention. In this study, we mainly investigated the feasibility and effectiveness of using computerized adaptive testing (CAT) to measure NP (CAT-NP). The CAT in this study was simulated by the responses of several NP questionnaires of 1,013 university students as if their responses were collected adaptively. The item bank (85 items) that met the requirements of the psychometric properties of Item Response Theory (IRT) was first established, and then the CAT dynamically selected items according to the estimates of current trait level until the prespecified measurement precision is achieved. Finally, the efficiency and validity of the CAT were verified. The results showed that the proposed CAT-NP had reasonable reliability, validity, predictive utility, and high correlation. In addition, the CAT-NP could significantly save item usage without losing measurement accuracy,