Conspiracist ideation in Britain and Austria: evidence of a monological belief system and associations between individual psychological differences and real-world and fictitious conspiracy theories

Despite evidence of widespread belief in conspiracy theories, there remains a dearth of research on the individual difference correlates of conspiracist ideation. In two studies, we sought to overcome this limitation by examining correlations between conspiracist ideation and a range of individual psychological factors. In Study 1, 817 Britons indicated their agreement with conspiracist ideation concerning the July 7, 2005 (7/7), London bombings, and completed a battery of individual difference scales. Results showed that stronger belief in 7/7 conspiracy theories was predicted by stronger belief in other real-world conspiracy theories, greater exposure to conspiracist ideation, higher political cynicism, greater support for democratic principles, more negative attitudes to authority, lower self-esteem, and lower Agreeableness. In Study 2, 281 Austrians indicated their agreement with an entirely fictitious conspiracy theory and completed a battery of individual difference measures not examined in Study 1. Results showed that belief in the entirely fictitious conspiracy theory was significantly associated with stronger belief in other real-world conspiracy theories, stronger paranormal beliefs, and lower crystallized intelligence. These results are discussed in terms of the potential of identifying individual difference constellations among conspiracy theorists.     

Memory and brain volume in adults prenatally exposed to alcohol

The impact of prenatal alcohol exposure on memory and brain development was investigated in 92 African-American, young adults who were first identified in the prenatal period. Three groups (Control, n=26; Alcohol-related Neurodevelopmental Disorder, n=36; and Dysmorphic, n=30) were imaged using structural MRI with brain volume calculated for multiple regions of interest. Memory was measured using the Verbal Selective Reminding Memory Test and its nonverbal counterpart, the Nonverbal Selective Reminding Memory Test, which each yielding measures of learning and recall. For both Verbal and Nonverbal Recall and Slope, linear trends were observed demonstrating a spectrum of deficits associated with prenatal alcohol exposure. Dysmorphic individuals performed significantly poorer than unexposed controls on 5 of 6 memory outcomes. Alcohol-exposed individuals demonstrated significantly lower total brain volume than controls, as well as lower volume in a number of specific regions including hippocampus. Mediation analyses indicated that memory performance associated with effects of prenatal alcohol exposure was mediated from dysmorphic severity through hippocampal volume, particularly right hippocampus. These results indicate that the association between the physical effects of prenatal alcohol exposure and deficits in memory are mediated by volumetric reduction in specific brain regions.     

The neural basis of human error processing: reinforcement learning,dopamine, and the error-related negativity

The authors present a unified account of 2 neural systems concerned with the development and expression of adaptive behaviors: a mesencephalic dopamine system for reinforcement learning and a "generic" error-processing system associated with the anterior cingulate cortex. The existence of the error-processing system has been inferred from the error-related negativity (ERN), a component of the event-related brain potential elicited when human participants commit errors in reaction-time tasks. The authors propose that the ERN is generated when a negative reinforcement learning signal is conveyed to the anterior cingulate cortex via the mesencephalic dopamine system and that this signal is used by the anterior cingulate cortex to modify performance on the task at hand. They provide support for this proposal using both computational modeling and psychophysiological experimentation.     

Hoarding behaviors in a large college sample

Hoarding behaviors occur in many clinical syndromes but are most commonly linked to obsessive compulsive disorder. Surprisingly little empirical work has examined the nature of hoarding behaviors despite their association with significant distress and impairment. The current study examined hoarding in 563 unselected college students. Using principal components analysis, we identified four domains of hoarding behaviors as measured by the 26-item Saving Inventory-Revised: Difficulty Discarding, Acquisition Problems, Clutter, and Interference/Distress. All four domains and total hoarding behaviors were strongly related to hoarding beliefs and to obsessive compulsive (OC) symptoms. Hoarding behaviors were most strongly correlated with subscales of an OC disorder (OCD) measure assessing hoarding and obsessions and least strongly correlated with the washing subscale. Hoarding behaviors also showed significant, but more modest, correlations with social anxiety, depressive symptoms, and worry. However, worry was not found to contribute unique variance to the prediction of hoarding behaviors. Of greatest note, hoarding behaviors showed a surprisingly strong relationship with anxiety sensitivity, similar in magnitude to the relationship between hoarding and OCD symptoms. Results are interpreted and lines of future research are proposed, with particular emphasis on further elucidating the relationship between hoarding behaviors and anxiety sensitivity.     

"Not just right experiences": perfectionism,obsessive-compulsive features and general psychopathology

Individuals with obsessive-compulsive disorder (OCD) frequently report uncomfortable sensations of things not being just right ("not just right experiences"; NJREs) and a need to ritualize until they quiet these sensations. However, very little work has been conducted to empirically examine the nature and characteristics of this phenomenon. In this paper, we present two studies that systematically examine NJREs in large undergraduate samples. In Study 1, NJREs were shown to be related to both OCD features and maladaptive domains of perfectionism. In Study 2, NJREs were again significantly related to OCD features. Further, NJREs were shown to have particularly strong relationships with specific OCD symptom clusters (e.g., checking, ordering). Finally, NJREs were significantly more strongly correlated with features of OCD than symptoms from other domains of psychopathology (e.g., social anxiety, trait anxiety, worry, depression). General conclusions are drawn, and future directions are discussed.     

Moving Beyond an Exclusive Focus on Harm Avoidance in Obsessive-Compulsive Disorder: Behavioral Validation for the Separability of Harm Avoidance and Incompleteness

There is increasing recognition that symptoms of obsessive-compulsive disorder (OCD) may be associated not only with harm avoidance, but also with sensations of things being incomplete or not “just right.” Although preliminary research supports the presence of both harm avoidance and incompleteness in OCD, their validity as separate constructs has not been tested beyond the use of self-report measures. Therefore, the aim of the current study was to behaviorally validate the separability of harm avoidance and incompleteness using an unselected student sample. Consistent with hypotheses, self-reported levels of incompleteness and harm avoidance uniquely predicted participants' ratings of their experiences while performing OCD-relevant behavioral tasks (e.g., washing dirty dishes, arranging books on a bookshelf). Results suggest that harm avoidance is associated with anxiety/nervousness and a desire to prevent harm, whereas incompleteness is linked to feelings of tension/discomfort and a desire to perform tasks perfectly or just right. Theoretical and clinical implications are discussed.     

Interpretation of facial expressions and social anxiety: Specificity and source of biases

Cognitive-behavioural models of social phobia (Clark & Wells, 1995; Rapee & Heimberg, 1997) propose that biased information processing contributes to the maintenance of social phobia. Given the importance of facial expressions in social interactions, recent investigations of these information-processing biases have increasingly used facial stimuli. The current study utilised schematic faces of emotional expressions to investigate interpretations of facial expressions and specific facial features in individuals with high and low social anxiety. Individuals with elevated social anxiety demonstrated biases in their perceptions of negative valence from the faces, whereas group differences were not observed for perceptions of activity or potency. Further, although the two groups generally utilised the same facial features to interpret facial expressions, the results suggested that individuals with high social anxiety may be more lenient in perceiving threat in faces than individuals without social anxiety.