Observed parent-adolescent autonomy struggles were assessed as potential predictors of the development of peer-rated hostility over a decade later in young adulthood in both normal and previously psychiatrically hospitalized groups of adolescents. Longitudinal, multireporter data were obtained by coding family interactions involving 83 adolescents and their parents at age 16 years and then obta...

Ballistocardiograms were obtained from 319 well-screened young soldiers on an electrically equalized electromagnetic ballistocardiograph. The records were analyzed for the basic pattern and for variations. The conventional criteria of normal were confirmed. The most frequently observed variation consisted of changes in complexes written during expiration which, when of sufficient degree, resemb...

We now realize that individual values, obtained while observing apparently healthy animals, may deviate appreciably from the mean of such values and still, so far as we can tell, be compatible with health. Values that deviate considerably from the mean may nevertheless be ‘normal’. Values for the concentration of haemoglobin in the blood belong to this category and pose rather special problems ...

Genealogical, demographic, and economic data collected in a rural Trinidadian village indicate that: (1) individuals with more land have more offspring, (2) males with more land have higher mating success, (3) young adults with parents resident in the village have higher reproductive success, and (4) the residence o f father has a strong effect on young adult male reproductive success, but appa...

[Purpose] The purpose of the present study is to clarify whether tilted scenery presented through an immersive head-mounted display (HMD) causes the inclination of standing posture. [Subjects and Methods] Eleven healthy young adult males who provided informed consent participated in the experiment. An immersive HMD and a stereo camera were employed to develop a visual inclination system. The su...

This study examined the role of extradyadic involvement (EDI) in heterosexual dating relationships among young adult females (N = 539). A considerable percentage of participants (36 %) reported that they had engaged in an extradyadic emotional or sexual relationship within the last 2 months. Results from logistic regression analyses supported the general hypothesis that emotional and sexual EDI...

Friends with benefit relationships (FWB) combine elements of ongoing friendship and physical intimacy. Although many studies have examined predictors of who are likely to enter these relationships as well as their outcomes, we do not know what relational factors are associated with FWB relationship outcomes. This study examined the association between three commitment variables: couple identity...

Nondaily smoking is becoming common in young adults and there appear to be different characteristics associated with past month smoking frequency among nondaily smokers. The present study examines behavioral and psychosocial correlates of smoking among subgroups of nondaily college student smokers (N = 80; 18-25 years of age) attending a large, public university. Nondaily smokers were categoriz...

The purpose of this survey study was to evaluate a model of body image influences on indoor tanning behavior. Participants were 823 young adult women recruited from a probability-based web panel in the United States. Consistent with our hypothesized model, tanning-related sociocultural experiences were indirectly associated with lifetime indoor tanning use and intentions to tan as mediated thro...

The Author Recognition Test (ART) measures print exposure and is a unique predictor of phonological and orthographic processes in reading. In a sample of adolescent and young adult twins and siblings (216 MZ/430 DZ pairs, 307 singletons; aged 11-29 years) ART scores were moderately heritable (67%) and correlated with reading and verbal abilities, with genes largely accounting for the covariance...