Search PubMed⌕ Search

Biomedical subjects

R B Cairns

Publications and source records attributed to R B Cairns.

6 recordsLinked to original sources
PubMed1990

Development, microevolution, and social behavior.

The central questions of social development--from the roots of mother-infant attachment to the plasticity of aggressive behavior--pivot on the relations between genetic and ontogenetic sources of variance. It is proposed that (a) developmental, experiential, and microevolutionary processes typically collaborate, rather than compete, in achieving social adaptation; (b) social behavior patterns are mostly closed to modification in the course of development and across generations, but avenues of vulnerability exist in ontogeny and microevolution for dynamic, rapid, and reversible changes in key features; (c) a general avenue for change is delay or acceleration in the developmental onset of one or more features of the behavior pattern, which in turn modifies the functions and properties of the adaptive configuration; and (d) the features of social behavior that are open to rapid change in ontogeny should be open as well to rapid changes in microevolution, although different underlying processes may be involved. Empirical findings from the investigation of aggressive interactions are used to illustrate this proposal on the dual genesis and coincident adaptation of social behaviors.

Animals↗
PubMed1989

Firearm ownership among nonurban adolescents.

Firearm injury is the second leading cause of death among teenagers. In this study we examined firearm acquisition and ownership in a biracial cohort of 664 teenagers (313 male and 351 female). Ownership was prevalent among male adolescents (48%) and rare among female adolescents (4%). Among these suburban and rural teenagers, the ownership rate was highest for white male adolescents (56%). Handgun ownership was more frequent among male school dropouts (22%) than enrollees (7%). The first firearm was typically acquired by late childhood or early adolescence (median age, 12.5 years). An adult male family member (eg, father, grandfather, uncle) was the primary source. The prevalence, developmental timing, and sociodemographic correlates of firearm acquisition should be useful for informing preventive clinical practice and interventions.

Adolescent↗
PubMed1989

Early school dropout: configurations and determinants.

This longitudinal study examined behavioral, cognitive, and demographic factors associated with early school dropout. Follow-up assessments were completed on a sample of girls (n = 248) and boys (n = 227) who had first been seen when they were in the seventh grade. School status was determined for all living subjects; 99% of them were interviewed individually in the fifth annual test wave. Overall, 14% of the group had dropped out of school prior to completing grade 11. The clusters of males and females most vulnerable to early school dropout were characterized in grade 7 by high levels of aggressiveness and low levels of academic performance (82% early dropout in males; 47% early dropout in females). In seventh grade, subjects who subsequently dropped out tended to affiliate with persons who were also at risk for dropout. Socioeconomic status, race, and early parenthood were also associated with school dropout. The primary outcomes were supported by convergent variable-oriented and person-oriented analyses. Some developmental dynamics of the phenomena are discussed.

Achievement↗
PubMed1988

A developmental-genetic analysis of aggressive behavior in mice (Mus musculus): III. Behavioral mediation by heightened reactivity or immobility?

This research was designed to investigate development and behavioral mediation in lines of ICR mice that have been selectively bred for aggressive behavior. General behavioral reactivity and behavioral immobility have been implicated as potential mediators by prior analyses of preattack interactions. To evaluate the separate roles of these dispositions, the emergence of attacks in genetically selected lines was tracked for 11 years by three levels of analysis: over successive generations, over development, and over dyadic interactions. Convergent outcomes were observed in all three levels with respect to two findings: (a) Robust line differences were obtained in attack behaviors, and (b) strong associations were found between line differences in attacks and line differences in behavioral immobility. Conversely, all three levels of analysis indicated a weak and inconsistent association between line differences in attacks and measures of social and nonsocial reactivity.

Aggression↗