Antonia María Jiménez-Ros

Background: Mental contamination (MC) refers to feelings of internal filthiness associated with contamination obsessions. Ego-dystonic memories and thoughts can trigger MC, although it can also be activated by trauma, which is associated with the onset of post-traumatic stress disorder (PTSD). Research shows that MC, negative emotions and PTSD can occur simultaneously. Despite considerable interest from researchers and clinicians, to the best of our knowledge, no systematic review has been carried out on the relationship between disgust and other negative emotions with MC and PTSD. Therefore, we conducted this systematic review to summarise and synthesise the current understanding of these constructs in PTSD. The main objective of this study was to review the association between MC, post-traumatic stress disorder and trauma; the role of disgust and other negative emotions in these associations; and whether the relationship between MC and trauma is limited to traumatic sexual experiences. Method: We searched PsycINFO, Psychology and Behavioural Sciences Collection, Scopus, Web of Science, Medline, PubMed, ProQuest Dissertations and Theses, Cochrane Library, APA PsycNet, and the Online Library of the University of Algarve. We also included grey literature published in Google Scholar. The Mixed Methods Appraisal Tool was used to assess the methodological quality of the included studies. Results: Twenty studies met the inclusion criteria for the review. Among these, six studies used a randomised methodology, nine used a non-randomised methodology, and five used a descriptive methodology. The results showed that MC is associated with all types of interpersonal trauma, although the relationship with sexual trauma was the strongest. Both basic emotion and disgust sensitivity appear to be significantly associated with MC and the severity of PTSD symptoms. Similarly, other negative emotions are positively associated with MC, although the experience and reappraisal of negative emotions may potentially attenuate the experience of MC. Conclusions: Based on the findings, MC, disgust and negative emotions are important clinical constructs associated with trauma and PTSD. These results may contribute to our understanding and treatment of PTSD.

Cognitive models of obsessive-compulsive disorder attribute a causal role to maladaptive beliefs. To test this hypothesis, we manipulated Overimportance of Thoughts (OT) beliefs and experimentally evaluated their effect on the response to an induced aggressive impulse. Eighty-five participants completed a battery of self-report instruments assessing obsession symptoms, thought control, affectivity and obsessive beliefs, and were then randomly assigned to two conditions. In the experimental condition participants read a scientific abstract on the importance of thought control whilst those in the control condition read a neutral All participants identified a loved person and imagined feeling the impulse to stab this person, then completed again OT beliefs measures (Overimportance of Thought, Moral-Thought Action Fusion and Thought Action Fusion Likelihood). The Moral component of the Thought Action Fusion was reduced by reading a brief text about the possibility and desirability of thought control. However, experimentally induced changes in beliefs did not yield differences in the intrusiveness of the aggressive impulse. Some beliefs can be modified through a single session in which information similar to what could be obtained in quotidian life is provided.

Worry is a common phenomenon with people who anticipate and want to be prepared for future events. Pathological worry, however, is not limited to anticipating potentially dangerous events, but it is applied to small daily events, too. This kind of worry is perceived as uncontrollable, and it is strongly associated with catastrophism. The Penn State Worry Questionnaire (PSWQ) was developed to assess pathological worry. Despite its excellent psychometric characteristics, its internal structure is still controversial. The combination of regular and reversed items and certain methodological considerations may account for the discrepancies in the results of previous investigations. With the aim to analyze worry in Portugal and the psychometric properties of the PSWQ, for the present study, methodological options were considered in order to minimize previous problems. A sample of 558 Portuguese community participants took part in this study. Exploratory and Confirmatory Factor Analysis were performed with two independent random subsamples. The results showed the unidimensionality of PSWQ and the psychometric adequacy of both the full, 16-item version and a reduced, 11-item version (without reversed scored items). Normative data are presented, the suitability of both versions is discussed, and the authors conclude by encouraging the use of the reduced, 11-item version of the PSWQ in applied settings.

Background:The mechanisms and triggers of the attentional bias in social anxiety are not yet fully determined, and the modulating role of personality traits is being increasingly acknowledged.Aims:Our main purpose was to test whether social anxiety is associated with mechanisms of hypervigilance, avoidance (static biases), vigilance-avoidance or the maintenance of attention (dynamic biases). Our secondary goal was to explore the role of personality structure in shaping the attention bias.Method:Participants with highvslow social anxiety and different personality structures viewed pairs of faces (free-viewing eye-tracking task) representing different emotions (anger, happiness and neutrality). Their eye movements were registered and analysed for both whole-trial (static) and time-dependent (dynamic) measures.Results:Comparisons between participants with high and low social anxiety levels did not yield evidence of differences in eye-tracking measures for the whole trial (latency of first fixation, first fixation direction, total dwell time), but the two groups differed in the time course of overt attention during the trial (dwell time across three successive time segments): participants with high social anxiety were slower in disengaging their attention from happy faces. Similar results were obtained using a full-sample, regression-based analysis.Conclusion:Our results speak in favour of a maintenance bias in social anxiety. Preliminary results indicated that personality structure may not affect the maintenance (dynamic) bias of socially anxious individuals, although depressive personality structures may favour manifestations of a (static) hypervigilance bias.