Longitudinal links between adolescent social anxiety and depressive symptoms: testing the mediational effects of cybervictimization

This study focuses on the temporal sequence between social anxiety and depressive symptoms, and whether cybervictimization might mediate these links. We used a longitudinal sample of 501 early adolescents (51.9% girls; Mage = 13.96) followed at three time points. Using a cross-lagged path model in MPlus, we found that social anxiety predicted depressive symptoms over time, but not the other way around. Time-1 depressive symptoms also predicted cybervictimization, but only for boys and not for girls. No mediating effects of cybervictimization emerged; however, Time-2 social anxiety was a significant mediator between Time-1 social anxiety and depressive symptoms, whereas Time-2 depressive symptoms significantly mediated the link between Time-1 social anxiety and Time-3 depressive symptoms. In sum, social anxiety was a strong predictor of depressive symptoms over time but not vice versa-irrespective of cybervictimization

Conductance anisotropy and linear magnetoresistance in La2-xSrxCuO4 thin films

We have performed a detailed study of conductance anisotropy and magnetoresistance (MR) of La2-xSrxCuO4 (LSCO) thin films (0.10 < x < 0.25). These two observables are promising for the detection of stripes. Subtle features of the conductance anisotropy are revealed by measuring the transverse resistance Rxy in zero magnetic field. It is demonstrated that the sign of Rxy depends on the orientation of the LSCO Hall bar with respect to the terrace structure of the substrate. Unit-cell-high substrate step edges must therefore be a dominant nucleation source for antiphase boundaries during film growth. We show that the measurement of Rxy is sensitive enough to detect the cubic-tetragonal phase transition of the SrTiO3(100) (STO) substrate at 105 K. The MR of LSCO thin films shows for 0.10 < x < 0.25 a non-monotonic temperature dependence, resulting from the onset of a linear term in the MR above 90 K. We show that the linear MR scales with the absolute Hall resistivity, with the constant of proportionality independent of temperature. Such scaling suggests that the linear MR originates from current distortions induced by structural or electronic inhomogeneities. The possible role of stripes for both the MR and the conductance anisotropy is discussed throughout the paper

Social anxiety moderates the links between excessive chatting and compulsive Internet use

Excessive online chatting can lead to unwanted consequences such as compulsive Internet use over time. Not all adolescents use chatting for the same purpose, however, and these links may not be as pronounced for socially anxious adolescents as they likely communicate with others online in order to compensate for offline social inadequacies. The current study investigated whether social anxiety moderated the links between excessive chatting and compulsive Internet use over time. Using a sample of 523 early adolescents (269 girls; Mage = 14.00) from a 3-wave longitudinal study, the links between excessive chatting and compulsive Internet use were investigated via manifest autoregressive models, and moderating effects of social anxiety were tested via multiple-group comparison procedures. The results showed bidirectional links between excessive chatting and compulsive Internet use from Time 2–Time 3, as excessive chatting predicted more symptoms of compulsive Internet use, whereas compulsive Internet use predicted more excessive chatting – over and above the effects of gender. These links were present for adolescents low on social anxiety, but they were largely missing for highly socially anxious adolescents. Thus, social anxiety may have protective effects for early adolescents who spend too much time chatting online, as it may help reduce the risk of developing symptoms of compulsive Internet use

Shy adolescents' perceptions of parents' psychological control and emotional warmth: Examining bidirectional links

Two kinds of parental behaviors—psychological control and emotional warmth—have been linked with children's shy behaviors. The questions we addressed are whether this applies to adolescent shyness, and whether shyness in itself might also affect perceptions of parental behaviors. The participants were 916 seventh to ninth graders in a longitudinal project. We used a cross-lagged panel model with three time points in MPlus with adolescents' self-reports of shyness and perceptions of parents' psychological control (intrusive control and rejection) and warmth. Shyness predicted an increase in perceptions of intrusive control by parents at Time 2, which then predicted an increase in shyness at Time 3. Shyness also predicted an increase in perceived rejection by parents at Time 2. Finally, shyness predicted decreases in parental warmth at both time points. The effects did not differ for boys and girls. These results show that adolescent shyness predicts parental behaviors, though perhaps less strongly than in childhood. They also suggest some bidirectional effects in which perceived parental responses to shy youths might serve to strengthen the shyness

Supergravity and M-Theory

Supergravity provides the effective field theories for string compactifications. The deformation of the maximal supergravities by non-abelian gauge interactions is only possible for a restricted class of charges. Generically these `gaugings' involve a hierarchy of p-form fields which belong to specific representations of the duality group. The group-theoretical structure of this p-form hierarchy exhibits many interesting features. In the case of maximal supergravity the class of allowed deformations has intriguing connections with M/string theory.Comment: 28 pages, LaTeX fil

Virtual reality exposure therapy for reducing social anxiety in stuttering: a randomized controlled pilot trial

We report on findings from the first randomized controlled pilot trial of virtual reality exposure therapy (VRET) developed specifically for reducing social anxiety associated with stuttering. People who stutter with heightened social anxiety were recruited from online adverts and randomly allocated to receive VRET (n = 13) or be put on a waitlist (n = 12). Treatment was delivered remotely using a smartphone-based VR headset. It consisted of three weekly sessions, each comprising both performative and interactive exposure exercises, and was guided by a virtual therapist. Multilevel model analyses failed to demonstrate the effectiveness of VRET at reducing social anxiety between pre- and post-treatment. We found similar results for fear of negative evaluation, negative thoughts associated with stuttering, and stuttering characteristics. However, VRET was associated with reduced social anxiety between post-treatment and one-month follow-up. These pilot findings suggest that our current VRET protocol may not be effective at reducing social anxiety amongst people who stutter, though might be capable of supporting longer-term change. Future VRET protocols targeting stuttering-related social anxiety should be explored with larger samples. The results from this pilot trial provide a solid basis for further design improvements and for future research to explore appropriate techniques for widening access to social anxiety treatments in stuttering

Inhibited and impulsive subgroups of socially anxious young adults: Their depressive symptoms and life satisfaction

Socially anxious people are typically thought of as being behaviorally inhibited; however, an atypical subgroup, which is impulsive rather than inhibited, has recently been identified [1]. Theoretically, inhibition and impulsivity could be viewed as different strategies for coping with anxiety that have the same goal—escape from negative emotions—but they seem to have different implications. Previous studies have found that the socially anxious-impulsive subgroup was higher on risk-prone behavior, as for example drug use, compared with a socially anxious inhibited subgroup. In this study, we aimed to identify these subgroups in a general population, and asked whether they also experience various levels of depressive symptoms and life satisfaction, as well as moderating effects of gender. Methods: Cluster analysis was used to identify subgroups of young adults (20 - 24 years old; N = 772) characterized by different profiles of social anxiety and impulsivity. These subgroups were compared on levels of internal adjustment, and the moderating effects of gender were also tested. Results: We identified five clusters, including an Anxious-Inhibited and an Anxious-Impulsive cluster. In the interaction between gender and cluster membership, gender showed evidence of moderation regarding both depressive symptoms and life satisfaction, with the young women in the Anxious-Inhibited and the Anxious-Impulsive clusters faring worst. Conclusions: We replicated previous findings demonstrating the existence of a socially anxious-impulsive subgroup, thus solidifying current knowledge that may be important when it comes to diagnostics and treatment. This may prove particularly important for young women regarding internalizing symptoms

Evaluation of the Social Phobia Scale and Social Interaction Anxiety Scale as assessments of performance and interaction anxiety

The DSM-5 classification of performance anxiety as distinct from social anxiety underlines the need for specific measurement instruments. The Social Phobia Scale (SPS) and Social Interaction Anxiety Scale (SIAS) are widely used assessments of performance and general interaction anxiety, yet few studies have examined their criterion validity using actual performance and interaction stressors. The current study is the first to assess the scales’ convergent and discriminant validity using multimodal anxiety indices including psychophysiological reactivity, which is a key characterizing feature of performance anxiety. Ninety-three individuals completed the SPS and SIAS and participated in performance and interaction challenges. Anxiety response was assessed with criterion measures of self-reported anxiety, observer-rated anxiety, heart rate and skin conductance. Both scales were moderately correlated with self-report and observer-rated anxiety (r’s = 0.21–0.62) and weakly correlated with physiological measures (r’s = 0.07–0.35), generally supporting convergent criterion validity. Discriminant cri- terion validity was not supported, however, with the SIAS and SPS showing similar correlations with each criterion measure for both social challenges. These findings suggest the SIAS and SPS are valid instruments for the assessment of social anxiety but may not be suitable for the specific measurement of performance and interaction anxiety