Individual differences in cardiovascular reactions to stress and cigarette smoking

The present study examined the stability of cardiovascular reactions to psychological stress and cigarette smoking, and the extent to which cardiovascular reactions to stress were predictive of cardiovascular reactions to smoking. Thirty subjects were given an initial test involving two repetitions of mental arithmetic stress and paced smoking while blood pressure and heart rate were measured. Two months later, 26 of these subjects were retested in the same paradigm. Large and stable individual differences were observed in cardiovascular reactivity to both stress and smoking. Moreover, for systolic and diastolic blood pressure, but not heart rate, reactions to stress were modestly correlated with reactions to cigarette smoking. These results are consistent with the possibility that level of reactivity to cigarette smoking may constitute a risk factor for coronary heart disease, and that one or more common variables may mediate the magnitude of blood pressure reactivity to both stress and cigarette smoking.     

Identification of olfactory stimuli as reinforcers in individuals with autism: a preliminary investigation

Preference for six olfactory stimuli was assessed via paired preference assessments with three adults with autism. Using a combination multielement and reversal design, a reinforcer assessment was then conducted to determine the extent to which three (high preference, medium preference, and low preference) of the six olfactory stimuli evaluated in the preference assessment functioned as reinforcers for responding in the context of a sorting task. Relative to baseline, all of the participants exhibited increased responding for access to their high preference olfactory stimulus. The utility of olfactory stimuli as components of behavior intervention plans is discussed. Copyright © 2008 John Wiley & Sons, Ltd.     

Spirituality and Subjective Religiosity among African Americans, Caribbean Blacks and Non-Hispanic Whites

Patterns and correlates of self-perceptions of spirituality and subjective religiosity are examined using data from the National Survey of American Life, a nationally representative study of African Americans, Caribbean Blacks and non-Hispanic Whites. Demographic and denominational correlates of patterns of subjective religiosity and spirituality (i.e., religious only, spiritual only, both religious/spiritual and neither religious/spiritual) are examined. In addition, the study of African Americans and Caribbean Blacks permits the investigation of possible ethnic variation in the meaning and conceptual significance of these constructs within the U.S. Black population. African Americans and Caribbean Blacks are more likely than Non-Hispanic Whites to indicate that they are "both religious and spiritual" and less likely to indicate that they are "spiritual only" or "neither spiritual nor religious." Demographic and denominational differences in the patterns of spirituality and subjective religiosity are also indicated. Study findings are discussed in relation to prior research in this field and noted conceptual and methodological issues deserving further study.     

Emotional Stroop via Internet among individuals with eating disorders

The present study investigated whether Stroop interference in eating disordered individuals for food - and body-related words, as repeatedly found previously using standard emotional Stroop tasks, would also be demonstrated when using an Internet based emotional Stroop task. Participants were anorexic women (n= 13), bulimic women (n= 20), non-clinically eating disordered women nevertheless over-concerned about eating and body appearance (n= 27) and normal control women (n= 31). Bulimic individuals showed Stroop interference for body-related words whereas anorexic individuals showed Stroop interference for food-related words. The present results thus suggest that administration of the emotional Stroop task is possible via the Internet. Furthermore, it is possible that the time consuming response delivery, relative to previous studies, could lead to Stroop interference only for the most emotionally significant information, in turn, differentiating between the core concerns of anorexic and bulimic individuals.     

Trajectories of Social Withdrawal from Middle Childhood to Early Adolescence

Heterogeneity and individual differences in the developmental course of social withdrawal were examined longitudinally in a community sample (N = 392). General Growth Mixture Modeling (GGMM) was used to identify distinct pathways of social withdrawal, differentiate valid subgroup trajectories, and examine factors that predicted change in trajectories within subgroups. Assessments of individual (social withdrawal), interactive (prosocial behavior), relationship (friendship involvement, stability and quality, best friend’s withdrawal and exclusion/victimization) and group- (exclusion/victimization) level characteristics were used to define growth trajectories from the final year of elementary school, across the transition to middle school, and then to the final year of middle school (fifth-to-eighth grades). Three distinct trajectory classes were identified: low stable, increasing, and decreasing. Peer exclusion, prosocial behavior, and mutual friendship involvement differentiated class membership. Friendlessness, friendship instability, and exclusion were significant predictors of social withdrawal for the increasing class, whereas lower levels of peer exclusion predicted a decrease in social withdrawal for the decreasing class.