Social anxiety and problematic cannabis use: evaluating the moderating role of stress reactivity and perceived coping

Despite epidemiological reports indicating an association between social anxiety disorder (SAD) and cannabis use disorders (CUD), there is a paucity of research exploring the nature of this relationship. The present investigation examined potential moderators of this relationship that are consistent with a tension-reduction model of addiction. Specifically, physiological reactivity to stress and perceived coping with stress were evaluated as moderators of the relation between symptoms of SAD and CUD. Physiological (SCR) and subjective (perceived coping) responses to unpredictable white noise bursts were collected from non-clinical participants (n=123). Lifetime symptoms of CUD and anxiety disorders were assessed using a structured diagnostic interview. CUD symptomatology was associated with symptoms of SAD but not with symptoms of any other anxiety disorder. Only perceived coping to unpredictable stimuli moderated the relationship between SAD and CUD symptoms. Findings are discussed in the context of tension-reduction models of co-occurring social anxiety and problematic cannabis use.     

Differential effects of safety in extinction of anxious responding to a CO2 challenge in patients with panic disorder

Safety-relevant parameters are hypothesized to be important to the maintenance of pathological anxiety. The authors examined the effects of safety information and safety cues on anxious responding to a repeated 35% CO2 challenge in 31 patients with panic disorder. Patients were randomly assigned to one of three conditions: (a) safety information, (b) safety information plus a safety cue, or (c) no safety information. In the safety information group, patients received accurate information regarding the benign effects of the CO2 challenge. In the combined group, patients also received a safety cue that is salient for many patients with panic disorder (i.e., access to an anxiolytic pill during the challenge). The experimental manipulations did not differentially affect anxious responding following an initial challenge. However, after access to the anxiolytic was removed and the challenge procedure was repeated, those in the safety information alone condition showed lower subjective anxiety compared to those in the combined safety information/safety cue group. Findings suggest that safety information facilitates extinction of anxiety but only in the absence of safety cues.     

The moderating influence of job performance dimensions on convergence of supervisory and peer ratings of job performance: unconfounding construct-level convergence and rating difficulty

Meta-analysis was used to cumulate the correlations between supervisor and peer ratings for different dimensions of job performance. The general pattern in the data suggested that raters from the same organizational level disagree as much as raters from different levels. Methods were used to separate the effects of rating difficulty and lack of construct-level convergence on the correlation between supervisor and peer ratings. The authors found complete construct-level convergence for ratings of overall job performance, productivity, effort, job knowledge, quality, and leadership but not for ratings of administrative competence, interpersonal competence, and compliance or acceptance of authority. Higher rating difficulty was more strongly associated with lower mean observed peer-supervisor correlations than were construct-level disagreements between peers and supervisors. Implications for research and practice are discussed.     

Anxiety sensitivity as a specific and unique marker of anxious symptoms in youth psychiatric inpatients

We addressed several questions regarding the relation of anxiety sensitivity to anxious symptoms among 47 youth psychiatric inpatients (18 boys, 29 girls), ages 9–17 (M = 14.23, SD = 1.89). Participants completed measures of anxiety sensitivity, anxious and depressive symptoms, trait anxiety, and positive and negative affect; chart diagnoses were available. Consistent with hypotheses, we found that (a) anxiety sensitivity was associated with anxious symptoms, even controlling for trait anxiety and depressive symptoms; and (b) anxiety sensitivity displayed symptom specificity to anxious versus depressive symptoms (i.e., was associated with anxiety controlling for depression but not with depression controlling for anxiety). Furthermore, regarding factors of anxiety sensitivity, we obtained mixed support for our prediction that phrenophobia would be associated with both depression and anxiety, whereas fear of physical arousal would be associated with anxiety but not depression. Implications for the construct validity of anxiety sensitivity were discussed.     

Suicidal behavior among urban,African American young adults

The objectives of the present study were four-fold. First, to determine the lifetime, last year, and 6-month prevalence and demographic correlates of suicidal behavior in a defined population of urban, African American young adults. Second, to determine the degree of mental health service utilization among attempters. Third, to study the comorbidity between mental disorders and suicidal behavior, along with the variation in the numbers and types of psychiatric disorders associated with attempts versus ideation only. Fourth, to examine gender differences in the psychiatric diagnoses associated with attempts and ideation. Data relevant to each of these objectives were gathered through structured interviews of 1,157 economically disadvantaged, African American young adults. Lifetime, last year, and 6-month prevalence rates for attempts were 5.3%, 1.2%, and 0.4%, respectively, whereas the lifetime and 6-month prevalence of ideation were 14% and 1.9%, respectively. Approximately two thirds of those who reported lifetime ideation, and a similar proportion of those who reported lifetime attempts, had a history of at least one lifetime psychiatric disorder. There were no gender differences in terms of the degree of risk for suicidal behavior (ideation or attempts) associated with any of the comorbid psychiatric diagnoses assessed. Despite the severity of most attempts, few attempters received mental health services in their lifetime or at the time of their most recent attempt.     

Limitations to the spacing effect: demonstration of an inverted u-shaped relationship between interrepetition spacing and free recall

The spacing effect refers to the finding that memory for repeated items improves when the interrepetition interval increases. To explain the spacing effect in free-recall tasks, a two-factor model has been put forward that combines mechanisms of contextual variability and study-phase retrieval (e.g., Raaijmakers, 2003; Verkoeijen, Rikers, & Schmidt, 2004). An important, yet untested, implication of this model is that free recall of repetitions should follow an inverted u-shaped relationship with interrepetition spacing. To demonstrate the suggested relationship an experiment was conducted. Participants studied a word list, consisting of items repeated at different interrepetition intervals, either under incidental or under intentional learn instructions. Subsequently, participants received a free-recall test. The results revealed an inverted u-shaped relationship between free recall and interrepetition spacing in both the incidental-learning condition and the intentional-learning condition. Moreover, for intentionally learned repetitions, the maximum free-recall performance was located at a longer interrepetition interval than for incidentally learned repetitions. These findings are interpreted in terms of the two-factor model of spacing effects in free-recall tasks.     

The structure of negative emotions in adolescents

This study examined the structure of negative emotions in a sample of nonclinical adolescents, using an approach that exclusively relied on child self-report. A large sample of adolescents (N = 968) completed self-report questionnaires measuring symptoms of fear, anxiety, and depression. Confirmatory factor analysis provided support for the notion that fear, anxiety, and depression are distinct yet correlated components of negative emotions. This result is in agreement with recent empirical findings and current theoretical notions on the structure of negative emotions in children and should be taken as an encouragement for researchers to develop more specific measures for assessing fear, anxiety, and depression in children.     

A Necessary Relation Algebra for Mereotopology

The standard model for mereotopological structures are Boolean subalgebras of the complete Boolean algebra of regular closed subsets of a nonempty connected regular T ₀ topological space with an additional "contact relation" C defined by xCy x ØA (possibly) more general class of models is provided by the Region Connection Calculus (RCC) of Randell et al. We show that the basic operations of the relational calculus on a "contact relation" generate at least 25 relations in any model of the RCC, and hence, in any standard model of mereotopology. It follows that the expressiveness of the RCC in relational logic is much greater than the original 8 RCC base relations might suggest. We also interpret these 25 relations in the the standard model of the collection of regular open sets in the two-dimensional Euclidean plane.     

Hopelessness depression as a distinct dimension of depressive symptoms among clinical and non-clinical samples

Subtyping depression has been an interest of theorists and clinicians for at least four centuries. In this paper, we examined the validity of the symptom cluster component of the hopelessness theory of depression. We used structural equation modeling analyses on large samples of psychiatric outpatients (N=1604, 844, and 680) and Air Force cadets (N=1404) who completed the items of the Beck Depression Inventory (BDI). Findings were supportive of the hopelessness depression cluster as a distinct depressive syndrome. Implications for the nosology of depression and for depression theory were discussed.