A look through dark-colored glasses: The Dark Tetrad and affective processing.

The Dark Tetrad personality traits (i.e., narcissism, Machiavellianism, psychopathy, and sadism) have been continuously linked to various deficits in affective reactivity. The aim of this study was to examine the relationship of the Dark Tetrad and processing of emotional pictures. A total of 144 participants (56.9% female, Mage = 22.18, SDage = 2.26) completed measures of the Dark Tetrad, and rated pictures selected form the International Affective Picture System (IAPS), classified in accordance with their norms into highly arousing positive and negative. Affective processing measures included participants' valence and arousal ratings, while cognitive processing was measured my means of the response latency for each response. The results showed that the dark traits were related only to valence, but not arousal ratings. Higher narcissism and lower sadism were associated with more positive valence ratings of positive pictures, and higher sadism was associated with more positive ratings of negative pictures. Moreover, higher Machiavellianism predicted faster assessment of valence and arousal of both positive and negative pictures, and higher sadism predicted slower assessment of negative pictures' valence. Obtained results indicate that deficiencies in affective processing are more pronounced in sadism compared to other dark traits, while Machiavellianism is associated with advantages in cognitive processing, highlighting their significance and uniqueness in the Dark Tetrad constellation.

How much stressful life events really matter? Conceptual and methodological difficulties in assessing the impact of self-reported events on adolescents' subjective stress.

Numerous studies have pointed to the strong impact of stressful life events on subjective stress and indirectly on the adolescents' mental health. However, the results of many such studies contain bias caused by the choice of measurement method or an incomplete theoretical framework. To estimate the extent of possible bias when using self-reports, we conducted research on a representative sample of 2201 Croatian adolescents aged 14-18 years. Using manipulation we examined the influence of measurement method and the number of constructs included in the model on the variance of subjective stress explained by stressful events. Structural equation modelling indicated that different measurement methods, occurrence-based and severity-based, provide a marked discrepancy in the impact size estimation. The occurrence-based method provided estimates of a much smaller proportion of the explained variance (6%-25%) compared to the severity-based approach, which estimated the explained variance in the range of 25%-55% depending on the model. The complexity of the tested models additionally contributed to the variation in the estimates. It is recommended that when using self-reports to measure stressful life events, occurrence-based and severity-based methods are used simultaneously and that impact estimates are expressed within intervals.