Examined the structure of self-report scales designed to assess the frequency of adolescent problem behaviors. Urban (n = 988) and rural (n = 1,895) middle school students completed the Problem Behavior Frequency Scale (Farrell, Danish, & Howard, 1992a) and measures of other relevant constructs. Confirmatory factor analyses supported a model that included specific factors related to aggression, drug use, and delinquent behaviors, and a higher order problem behavior factor. Findings did not support a distinction between physical and nonphysical aggression. Results were generally consistent across settings (i.e., urban vs. rural) and gender. Other relevant constructs, including peer pressure for drug use and attitudes favoring aggression, had both specific associations with relevant first-order factors and more general associations with the second-order factor. These findings support the construction of separate scales assessing specific domains of problem behaviors in studies of adolescents' problem behaviors.

This study examined the relation between witnessing violence and drug use initiation among 6th graders attending middle schools in 5 rural counties and investigated the extent to which family support and parental monitoring moderated this relation. Data were obtained from 1,282 adolescents at 2 time points during the 6th grade. Witnessing violence predicted subsequent initiation of cigarette, beer and wine, liquor, and advanced alcohol use. Adolescents who reported high levels of family support and parental monitoring were less likely to initiate use across all drug categories except beer and wine. High levels of parental monitoring and family support were effective in buffering the relation between witnessing violence and initiation of cigarette and advanced alcohol use at low levels of witnessing violence. With increasing levels of witnessing violence, however, the protective effects of monitoring and support were substantially diminished. These findings have important implications for research and intervention efforts.

Rotated mirror/normal letter discriminations are thought to require mental rotation in order to determine the direction of facing of the stimulus. The response time (RT) function over orientation tends to be curved, rather than the linear function found for other mental rotation tasks. The present study investigated the possibility that the curved RT function is a result of a mixture of trials requiring and not requiring mental rotation. The results suggested that the frequency of mental rotation is also a linear function of stimulus orientation. Moreover, the relationship between an individual's rate of plane rotation and the mean difference in RT between mirror and normal stimuli was replicated, supporting the suggestion that mirrored stimuli are flipped after they are spun (Hamm, Johnson, & Corballis, 2004). On the basis of the present findings, the entire RT function can be modeled by using only the mean RTs for upright and inverted stimuli.

We conducted a clinic-based study focusing on the clinical features of new-onset chronic daily headaches (CDH) in children and adolescents. The clinical records and headache diaries of 306 children and adolescents were reviewed, to identify 187 with CDH. Relevant information was transferred to a standardized form that included operational criteria for the diagnoses of the headaches. Since we were interested in describing the clinical features of these headaches, we followed the criteria A and B of the 2nd edn of the International Classification of Headache Disorders (ICHD-2) and refer to them as new daily persistent headaches (NDPH) regardless of the presence of migraine features (therefore, this is a modified version of the ICHD-2 criteria). From the 56 adolescents with NDPH, most (91.8%) did not overuse medications. Nearly half (48.1%) reported they could recall the month when their headaches started. NDPH was more common than chronic tension-type headache in both adolescents overusing and not overusing medication. Individuals with NDPH had headaches fulfilling criteria for migraine on an average of 18.5 days per month. On most days, they had migraine-associated symptoms (one of nausea, photophobia or phonophobia)). NDPH is common in children and adolescents with CDH. Most subjects do not overuse medication. Migraine features are common.