Scandinavian journal of psychology
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There is substantial evidence to indicate that negative emotion can modulate cognitive control processing. However, only a few studies have investigated this effect with positive emotion. Therefore, the present study explored the electrophysiological correlates of the impact of positive emotional stimuli on cognitive control, using event-related potentials (ERPs). ⋯ It is suggested that these components may respectively be related to the conflict monitoring (N300-400) and response selection (N450-550) stages of cognitive control processing. Overall, our results indicated that positive emotion could facilitate cognitive control processing. These results are in line with the neuropsychological theory, according to which, positive emotion could modulate cognitive control mediated by increased dopamine levels in frontal brain areas.
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Electroencephalographic (EEG) frontal alpha asymmetry (FAA) and frontal midline (FM) theta have been suggested as biomarkers for depression and anxiety, but have mostly been assessed in small and non-clinical studies. In a clinical sample of 79 adults with depression (ICD-10: F32), resting EEG and scales of depression (MADRS) and anxiety (HADS-A) were measured at intake and after 3 months. FAA and FM theta values were referenced to a normative population database. ⋯ Reliability was sufficient. However, FAA and FM theta values were close to the general population, and correlations with psychiatric tests were mostly small and non-significant, with the exception of FAA on F7-F8 z-scores and HADS-A. We conclude that the validity of FAA and FM theta and therefore their potential as biomarkers for depression and anxiety remain unclear.
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The aim of this study is to examine whether and how laissez-faire, transformational, and authentic leadership styles are related to the occurrence of bullying in work groups. It is hypothesized that the investigated leadership styles have direct associations, as well as indirect associations through group cohesion and safety perceptions, with indicators of bullying among subordinates. Using a cross-sectional survey design, the variables were assessed in a randomly selected sample comprising 594 seafarers from two Norwegian shipping companies. ⋯ Analyses of indirect effects showed that the association between transformational leadership and bullying was fully mediated through safety perceptions, whereas a partial indirect association through safety perceptions was found for authentic leadership. This study makes a significant contribution to the literature by providing evidence for how leadership styles predict workplace bullying. The findings highlight the importance of recruiting, developing, and training leaders who promote both positive psychological capacities and positive perceptions among their subordinates.