Adolescent Trajectories of Depressive Symptoms : co-development of Behavioral and Academic Problems

Purpose: Increasing evidence suggests the existence of heterogeneity in the development of depressive symptoms during adolescence, but little remains known regarding the implications of this heterogeneity for the development of commonly co-occurring problems. In this study, we derived trajectories of depressive symptoms in adolescents and examined the codevelopment of multiple behavioral and academic problems in these trajectories. Methods: Participants were 6,910 students from secondary schools primarily located in disadvantaged areas of Quebec (Canada) who were assessed annually from the age 12 to 16 years. Trajectories were identified using growth mixture modeling. The course of behavioral (delinquency, substance use) and academic adjustment (school liking, academic achievement) in trajectories was examined by deriving latent growth curves for each covariate conditional on trajectory membership. Results: We identified five trajectories of stable-low (68.1%), increasing (12.1%), decreasing (8.7%), transient (8.7%), and stable-high (2.4%) depressive symptoms. Examination of conditional latent growth curves revealed that the course of behavioral and academic problems closely mirrored the course of depressive symptoms in each trajectory. Conclusions: This pattern of results suggests that the course of depressive symptoms and other adjustment problems over time is likely to involve an important contribution of shared underlying developmental process(es).

Behavioral Differences in the Upper and Lower Visual Hemifields in Shape and Motion Perception.

Perceptual accuracy is known to be influenced by stimuli location within the visual field. In particular, it seems to be enhanced in the lower visual hemifield (VH) for motion and space processing, and in the upper VH for object and face processing. The origins of such asymmetries are attributed to attentional biases across the visual field, and in the functional organization of the visual system. In this article, we tested content-dependent perceptual asymmetries in different regions of the visual field. Twenty-five healthy volunteers participated in this study. They performed three visual tests involving perception of shapes, orientation and motion, in the four quadrants of the visual field. The results of the visual tests showed that perceptual accuracy was better in the lower than in the upper visual field for motion perception, and better in the upper than in the lower visual field for shape perception. Orientation perception did not show any vertical bias. No difference was found when comparing right and left VHs. The functional organization of the visual system seems to indicate that the dorsal and the ventral visual streams, responsible for motion and shape perception, respectively, show a bias for the lower and upper VHs, respectively. Such a bias depends on the content of the visual information.

Behavioral and neurological evaluation of workers exposed to carbon disulfide (CS2) /

Mode of access: Internet.

Effects of trace concentrations of anesthetic gases on behavioral performance of operating room personnel /

Mode of access: Internet.

Animal care and use in behavioral research : regulations, issues, and applications : based on an invited paper session presented at the l988 meeting of the Animal Behavior Society /

"September 1989."

Effects of price changes on automobile driving: an exploration of alternative behavioral assumptions.

Mode of access: Internet.

Behavioral and neurological effects of methyl chloride : behavioral and neurological evaluation of workers exposed to industrial solvents : methyl chloride /

"Contract no. CDC 99-74-20."

Behavioral aspects of highway safety relevant to preparation of the beginning driver: a review of research.

California Traffic Safety Education Task Force

Analyses of demographic, attitudinal and behavioral characteristics of participants in the diagnostic inspection demonstration projects. Volume I - consumer responses in group comparisons.

National Highway Traffic Safety Administration, Washington, D.C.

Analyses of demographic, attitudinal and behavioral characteristics of participants in the diagnostic inspection demonstration projects. Volume III - perceptions of repair industry and Auto/SEE staff personnel.

National Highway Traffic Safety Administration, Washington, D.C.

Analyses of demographic, attitudinal and behavioral characteristics of participants in the diagnostic inspection demonstration projects. Volume IV - appendices. Part B.

National Highway Traffic Safety Administration, Washington, D.C.

Attitudinal and behavioral changes of alcohol impaired drivers and analytical study of the alcohol education program of the Boston Alcohol Safety Action Project. Analytical studies 5 and 6.

National Highway Traffic Safety Administration, Washington, D.C.

Analyses of demographic, attitudinal and behavioral characteristics of participants in the diagnostic inspection demonstration projects. Volume IV - appendices. Part A.

National Highway Traffic Safety Administration, Washington, D.C.

Human aging II : an eleven-year followup biomedical and behavioral study /

Mode of access: Internet.

The behavioral sciences at Harvard ; report

Mode of access: Internet.