Previous research on the natural history of smoking has focused on overall group trajectories without considering the possibility of risk subgroup variation. To address this limitation, the authors of the present study aimed to identify subgroups with varying trajectories of smoking behavior. The authors accomplished this within a cohort-sequential study of a large community sample (N = 8,556) with measurements spanning ages 11-31. After removing 2 a priori groups (abstainers and erratics), the authors empirically identified 4 trajectory groups--early stable smokers, late stable smokers, experimenters, and quitters--and psychosocial variables from adolescence and young adulthood were significantly distinguished among them. Given recent advances in quantitative methods, it is now feasible to consider subgroups of trajectories within an overall longitudinal design.
The current study examined the natural history of smoking from adolescence to adulthood in a community sample. Participants were from a longitudinal study (N = 4,035, 51.7% female, average age = 29 years). Group-level analyses showed a significant increase in smoking from adolescence to young adulthood and a nonsignificant decline after the mid-20s. Individual-level analyses showed that there was appreciable cessation and relapse but little new initiation in adulthood. Both adolescent and young adult smoking status were powerful predictors of adult smoking. Moreover, there was less cessation among less educated individuals and those with smoking parents, and more cessation among those who assumed adult social roles. The findings support the importance of prevention campaigns aimed at adolescent smoking and also suggest that those with lower educational attainment or with a family history of smoking are at heightened risk.
As people move through an environment, they typically change both their heading and their location relative to the surrounds. During such changes, people update their changing orientations with respect to surrounding objects. People can also update after only imagining such typical movements, but not as quickly or accurately as after actual movement. In the present study, blindfolded subjects pointed to objects after real and imagined walks. The role of rotational and translational components of movement were contrasted. The difficulty of imagined updating was found to be due to imagined rotation and not to imagined translation; updating after the latter was just as quick and accurate as updating after actual rotations and translations. Implications for understanding primary spatial orientation, the organization of spatial knowledge, and spatial-imagination processes are discussed.
Assessed the magnitude of risk that adolescent cigarette smoking carries for adult smoking. Using a longitudinal, prospective design, results indicate that even infrequent experimentation in adolescence significantly raises the risk for adult smoking and that regular (at least monthly) adolescent smoking raises the risk for adult smoking by a factor of 16 compared to nonsmoking adolescents. Relative risk was also increased by an early onset of smoking and by a stable, uninterrupted course from experimentation to regular smoking. Relative risk did not significantly vary by age or sex. The continuity of smoking behavior between adolescence and adulthood supports the importance of primary prevention programs directed at adolescent populations.
In a longitudinal study, the second-year-smoking status of adolescents who were initially Nonsmokers or Triers was predicted from their Year 1 standing o n three types of social psychological variables: Ajzen and Fishbein's factors (predicting smoking transitions from attitudes, normative beliefs and behavioral intentions about smoking); Jessor and Jessor's distal variables (predicting smoking transitions from more generalized personality and perceived environment factors), and smoking environment variables (predicting smoking transitions from the extent of smoking models in an adolescent's social milieu). The predictive power of these three categories of factors was compared. All three classes of social psychological variables were statistically significant predictors of smoking transition, although the Ajzen and Fishbein variables were more important for Triers while the Jessor and Jessor and smoking environment variables were more important for initial Never Smokers. Moreover, each category of variables made independent contributions to the prediction of smoking transition. Finally, there were several age and sex differences in the relative importance of predictor variables. Implications of these findings for the design of effective smoking prevention programs are discussed. Smoking prevention programs might be more effective if they were aimed at a specific high risk audience (as identified by the current study) rather than at a general adolescent population.Cigarette smoking is a negative health practice that is initiated primarily during the adolescent years (Public Health Service, 1976). National surveys have reported that smoking among adolescents (especially girls) increased almost 50% in a recent six-year period-from 15% in 1971 to 22% (Abelson, Fishburne, & Cisin, 1977. These findings point to the importance of targeting this age group for primary prevention campaigns, particularly when the disappointing results of smoking-cessation programs are considered (Levitt, 1979).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.