Pubertal maturation and cortisol level in response to a novel social environment among female adolescents.

Research indicates changes in HPA-axis activity across puberty. The current study extends existing work by evaluating pubertal status and cortisol level in a novel social environment (research laboratory) while controlling for several important biological, behavioral, and psychological variables. Participants were 30 girls (ages 9-16 years) from the United States.

Marijuana use among traumatic event-exposed adolescents: posttraumatic stress symptom frequency predicts coping motivations for use.

Contemporary comorbidity theory postulates that people suffering from posttraumatic stress symptoms may use substances to cope with negative affect generally and posttraumatic stress symptoms specifically. The present study involves the examination of the unique relation between past two-week posttraumatic stress symptom frequency and motives for marijuana use after accounting for general levels of negative affectivity as well as variability associated with gender. Participants were 61 marijuana-using adolescents (M(age)=15.

Elevated social anxiety among early maturing girls.

Adolescence is a key period in terms of the development of anxiety psychopathology. An emerging literature suggests that early pubertal maturation is associated with enhanced vulnerability for anxiety symptomatology, although few studies have examined this association with regard to social anxiety. Accordingly, the current study was designed to further elucidate the relation between pubertal timing and social anxiety, with a focus on clarifying the role of gender.

Posttraumatic stress and sleep: differential relations across types of symptoms and sleep problems.

Posttraumatic stress symptoms and self-reported sleep problems reliably covary. The current study investigated how posttraumatic stress symptom clusters (i.e.

A test of the effects of acute sleep deprivation on general and specific self-reported anxiety and depressive symptoms: an experimental extension.

Evidence indicates acute sleep deprivation affects negative mood states. The present study experimentally tested the effects of acute sleep deprivation on self-reported symptoms of state anxiety and depression as well as general distress among 88 physically and psychologically healthy adults. As hypothesized, the effects of acute sleep deprivation increased state anxiety and depression, as well as general distress, relative to a normal night of sleep control condition.

An experimental investigation of the effects of acute sleep deprivation on panic-relevant biological challenge responding.

Prospective research indicates sleep deprivation potentiates anxiety development, yet relatively little research has examined the effects of sleep deprivation in terms of specific types of anxiety. The current study tested the association between acute sleep deprivation and panic-relevant biological challenge responding among nonclinical participants. One hundred and two participants were randomly assigned to either an experimental (acute sleep deprivation) or control (no sleep deprivation) group.

Interactive roles of pubertal timing and peer relations in predicting social anxiety symptoms among youth.

The interaction between early maturation and problematic peer relations in relation to social anxiety symptoms was examined among 167 adolescents aged 10-17 years. Results indicated that early-maturing youth with problematic peer relations evidenced elevated social anxiety symptoms. Findings are discussed in terms of theoretical implications for adolescent social anxiety development.

Smoking and posttraumatic stress symptoms among adolescents: does anxiety sensitivity matter?

The present study examined the hypothesized moderating role of anxiety sensitivity (AS) in the relationship between lifetime smoking history and posttraumatic stress symptoms among 64 traumatic event-exposed adolescents. As predicted, the relationship between smoking status and posttraumatic stress symptom levels was moderated by AS. Specific facets of AS also were examined.

An investigation of tic suppression and the rebound effect in Tourette's disorder.

Many patients, parents of children with Tourette's disorder, and professionals have suggested that following a period of suppression, tics will rebound to a rate that will exceed the average rate of occurrence. At present, there are no empirical data to support or refute such an effect. This experiment utilized an A-B-A design with replication to test this hypothesized effect.