Intelligence and individual differences in becoming neurally efficient

Physiological approaches to human psychometric intelligence have shown a higher neural efficiency (i.e. less cortical activation) during cognitive performance in brighter subjects. The main aim of this study was to explore the relationship between intelligence and cortical activation patterns in the framework of the learning test concept. In 27 participants we assessed the topography and extent of cortical activation by means of event-related desynchronization (ERD) during reasoning tests in a pre-test--training--post-test design and related it to psychometric intelligence (measured by the German Leistungs-Prüf-System, LPS). Significant associations between intelligence and cortical activation patterns were exclusively found at anterior (frontal) recording sites, which corroborates the central role of the frontal lobe for higher-order cognitive functions. The hypothesized negative intelligence-activation correlation was observed only after the training, i.e. in the post-test, but not in the pre-test. More important, the decrease in cortical investment from pre-test to post-test correlated negatively with intelligence, indicating that the higher the subjects' general mental ability the larger the decrease in the amount of cortical activation. These findings suggest intelligence-related individual differences in becoming neurally efficient.     

Psychometric evaluation and experimental validation of the statistics anxiety rating scale

The Statistics Anxiety Rating Scale (STARS) was adapted into German to examine its psychometric properties (n = 400). Two validation studies (n = 66, n = 96) were conducted to examine its criterion-related validity. The psychometric properties of the questionnaire were very similar to those previously reported for the original English version in various countries and other language versions. Confirmatory factor analysis indicated 2 second-order factors: One was more closely related to anxiety and the other was more closely related to negative attitudes toward statistics. Predictive validity of the STARS was shown both in an experimental exam-like situation in the laboratory and during a real examination situation. Taken together, the findings indicate that statistics anxiety as assessed by the STARS is a useful construct that is more than just an expression of a more general disposition to anxiety.     

Testing and validating the trait emotional intelligence questionnaire (TEIQue) in a German-speaking sample

The trait emotional intelligence questionnaire (TEIQue) was tested and validated using a sample of 352 German-speaking participants. A detailed psychometric analysis provided evidence in support of the reliability of the TEIQue (at the facet, factor and global levels) and the robustness of its proposed four-factor structure. Using a subsample of 150 participants, the associations between the TEIQue and a series of relevant constructs (Big Five, life satisfaction, somatic complaints) were examined, which also included data on other trait EI measures. Overall, the TEIQue showed theoretically expected relationships to all other constructs and incremental validity in the prediction of life satisfaction and somatic complaints over and above the Big Five as well as all other trait EI measures combined.     

Measuring emotional management abilities: Further evidence of the importance to distinguish between typical and maximum performance

Freudenthaler and Neubauer (2005) have recently developed and validated performance measures of emotional management abilities (EMA), requiring subjects to indicate their typical behaviour in emotional situations (typical-performance instruction, TP) instead of assessing the effectiveness of different behavioural alternatives or indicating the most adequate response (maximum-performance instruction, MP). In the present study (n = 176), we examined the effects of these two instruction forms (TP vs. MP) on the EMA-scores in a between-subject design. In addition, the relations of typical and maximum EMA to cognitive intelligence components and personality traits were tested. Instruction-related comparisons of the EMA-scores yielded not only lower means but also higher standard deviations and higher reliabilities in the TP-condition. As expected, maximum EMA were significantly correlated with cognitive intelligence components but not with personality traits. In contrast, the typical EMA were moderately associated with personality traits but not related to cognitive abilities, providing further evidence of the importance to distinguish between typical and maximum performance.     

Typical performance measures of emotion regulation and emotion perception and frontal EEG asymmetry in an emotional contagion paradigm

In order to replicate and extend previous observations of validity of the self-reported habitual regulation of one’s affect and the perception of other people’s emotions, prefrontal electroencephalographic (EEG) asymmetry was recorded during and after social-emotional stimulation. After stimulation with other people’s vocal expression of anxiety, individuals with lower scores on emotion regulation did not show recovery of asymmetry changes but even increased changes in the direction that had been adopted during the stimulation. Whether this was to the right or to the left depended on their scores on emotion perception. Participants high on perception showed the expected changes to the right during the anxiety stimulation (indicating increased withdrawal motivation) and to the left during the cheerfulness stimulation (indicating increased approach motivation), whereas individuals low on perception showed the opposite pattern. During the anxiety stimulation, participants low on perception only showed the unexpected change to the left if they were also low on regulation. Individual differences in regulation did not play a role when participants were confronted with other people’s laughter. The findings demonstrate the validity of the self-report measures by using EEG measures, and moreover support the usefulness of differentiated and process-oriented approaches in the field of trait emotional intelligence.