The secret life of emotions

The possibility of unconsciously evoked emotions is often denied because awareness of an emotion's cause is considered to be precisely what produces the emotion. However, we argue that because emotional responding is important for successful living, both global and specific emotional responses can be induced without awareness. The present research used quick and super-quick subliminal priming techniques, and cognitive, feelings, and behavioral measures, to test this hypothesis. Our results show that both global moods and specific emotions can be evoked without conscious awareness of their cause.     

Dissociations between vision for perception and vision for action depend on the relative availability of egocentric and allocentric information

In three experiments, we scrutinized the dissociation between perception and action, as reflected by the contributions of egocentric and allocentric information. In Experiment 1, participants stood at the base of a large-scale one-tailed version of a Müller-Lyer illusion (with a hoop) and either threw a beanbag to the endpoint of the shaft or verbally estimated the egocentric distance to that location. The results confirmed an effect of the illusion on verbal estimates, but not on throwing, providing evidence for a dissociation between perception and action. In Experiment 2, participants observed a two-tailed version of the Müller-Lyer illusion from a distance of 1.5 m and performed the same tasks as in Experiment 1, yet neither the typical illusion effects nor a dissociation became apparent. Experiment 3 was a replication of Experiment 1, with the difference that participants stood at a distance of 1.5 m from the base of the one-tailed illusion. The results indicated an illusion effect on both the verbal estimate task and the throwing task; hence, there was no dissociation between perception and action. The presence (Exp. 1) and absence (Exp. 3) of a dissociation between perception and action may indicate that dissociations are a function of the relative availability of egocentric and allocentric information. When distance estimates are purely egocentric, dissociations between perception and action occur. However, when egocentric distance estimates have a (complementary) exocentric component, the use of allocentric information is promoted, and dissociations between perception and action are reduced or absent.     

Decision making under risk condition in patients with Parkinson's disease: a behavioural and fMRI study

We aimed to study whether previously described impairment in decision making under risky conditions in patients with Parkinson's disease (PD) is affected by deficits in using information about potential incentives or by processing feedback (in terms of fictitious gains and losses following each decision). Additionally, we studied whether the neural correlates of using explicit information in decision making under risk differ between PD patients and healthy subjects. We investigated ten cognitively intact PD patients and twelve healthy subjects with the Game of Dice Task (GDT) to assess risky decision making, and with an fMRI paradigm to analyse the neural correlates of information integration in the deliberative decision phase. Behaviourally, PD patients showed selective impairment in the GDT but not on the fMRI task that did not include a feedback component. Healthy subjects exhibited lateral prefrontal, anterior cingulate and parietal activations when integrating decision-relevant information. Despite similar behavioural patterns on the fMRI task, patients exhibited reduced parietal activation. Behavioural results suggest that PD patients' deficits in risky decision making are dominated by impaired feedback utilization not compensable by intact cognitive functions. Our fMRI results suggest similarities but also differences in neural correlates when using explicit information for the decision process, potentially indicating different strategy application even if the interfering feedback component is excluded.     

Pain perception in irritable bowel syndrome

Irritable bowel syndrome (IBS) is a functional gastrointestinal disorder characterized by chronic abdominal discomfort or pain in the absence of detectable organic disease. IBS is common and is associated with a significant impairment in health-related quality of life. Enhanced perception of visceral stimuli ("visceral hypersensitivity") appears to be an important pathophysiological mechanism. Early IBS studies using functional brain imaging techniques suggest an alteration in central pain modulation circuits, rather than an increased sensitivity of peripheral visceral pain pathways. The frequent comorbidity with psychiatric disorders suggests the possibility of shared pathophysiological mechanisms and etiologic factors.     

Childhood play and adolescent leisure preferences: Associations with gender typing and the presence of siblings

Childhood play and adolescent leisure preferences were solicited from a sample of 168 predominately white undergraduate students, who also completed the Bem Sex Role Inventory (BSRI; Bem, 1974) and provided ratings of the amount of time spent in play and leisure with same- and opposite-sex siblings. Higher Femininity (F) scores were found among those females who gave higher ratings of interaction with female siblings. The BSRI measures were also predicted by play and leisure preferences for strongly gender-stereotyped activities. Amount of interaction with same- and opposite-sex siblings was associated with activity preferences for both sexes. There was evidence of more sex-stereotyped preferences being given by those with same sex siblings and fewer by those with opposite sex siblings. The results are discussed in terms of the possible influences of siblings upon play and leisure preferences and the differing developmental pathways of male and female sex roles.     

Using a Learning Collaborative Model to Disseminate Cognitive Processing Therapy to Community-Based Agencies

Although effective treatments for posttraumatic stress disorder exist, their use in community settings is disappointingly low. Training alone does not necessarily lead to adoption. To address this problem, we trained community clinicians in cognitive processing therapy, an evidence-based treatment for posttraumatic stress disorder, using a Learning Collaborative, an intensive training methodology focused on both clinical training and developing sustainability. Sixty clinicians within 18 agencies began the year-long, team-based Learning Collaborative. Clinicians attended three in-person Learning Sessions, received weekly consultation, and submitted audio-recorded sessions to be rated for fidelity. Clinicians were rostered as approved treatment providers if they completed all training requirements. Additionally, we engaged leadership from each agency to build a sustainable practice. Clinicians trained through the Learning Collaborative demonstrated a high degree of fidelity to the treatment (average competence ratings “satisfactory” to “good”), and most (68%) were rostered as approved treatment providers. Patients treated by clinician trainees exhibited significant symptom reductions (d = 1.68 and 1.28 for posttraumatic stress and depression symptoms, respectively, among treatment completers). At a 6-month follow-up, 95% of rostered clinicians and 100% of agencies with rostered clinicians were still providing the treatment. These results suggest that the Learning Collaborative model is a promising approach for the dissemination and implementation of evidence-based treatments for adult posttraumatic stress disorder.