Age differences in personality traits across cultures: self‐report and observer perspectives

Using self‐report measures, longitudinal studies in the US and cross‐sectional studies from many cultures suggest that the broad factors of Neuroticism, Extraversion, and Openness to Experience decline from adolescence to adulthood, whereas Agreeableness and Conscientiousness increase. Data are inconsistent on the rate of change during adulthood, and on the generalizability of self‐report findings to informant ratings. We analysed cross‐sectional data from self‐reports and informant ratings on the Revised NEO Personality Inventory in Czech (N = 705) and Russian (N = 800) samples. Some curvilinear effects were found, chiefly in the Czech sample; informant data generally replicated self‐reports, although the effects were weaker. Although many of the details are not yet clear, there appear to be pan‐cultural trends in personality development that are consistent with the hypothesis of intrinsic maturation. Copyright © 2004 John Wiley & Sons, Ltd.     

Life events as predictors of mania and depression in bipolar I disorder

To date, few prospective studies of life events and bipolar disorder are available, and even fewer have separately examined the role of life events in depression and mania. The goal of this study was to prospectively examine the role of negative and goal-attainment life events as predictors of the course of bipolar disorder. One hundred twenty-five individuals with bipolar I disorder were interviewed monthly for an average of 27 months. Negative and goal-attainment life events were assessed with the Life Events and Difficulties Schedule. Changes in symptoms were evaluated using the Modified Hamilton Rating Scale for Depression and the Bech-Rafaelsen Mania Scale. The clearest results were obtained for goal-attainment life events, which predicted increases in manic symptoms over time. Negative life events predicted increases in depressive symptoms within regression models but were not predictive within multilevel modeling of changes in depressive symptoms. Given different patterns for goal attainment and negative life events, it appears important to consider specific forms of life events in models of bipolar disorder.     

Maladaptive personality traits and psychopathology in childhood and adolescence: the moderating effect of parenting

This study examines child and adolescent psychopathology from a maladaptive trait perspective, incorporating both parental and child ratings of parenting as a moderator of the personality-psychopathology association. Hierarchical moderated regression analyses were conducted on a combined sample of referred and nonreferred children and adolescents (N=862, parental ratings of parenting and N=396, child ratings of parenting). The results indicated positive main effects of maladaptive traits on externalizing and internalizing problems, and positive main effects of parental negative control on externalizing problems. Significant interactions were found for Disagreeableness and Emotional Instability with parental Negative Control and for Disagreeableness x Positive Parenting in explaining externalizing problems. The discussion focuses on the contribution of these findings to a better understanding of the trait-psychopathology relationship at young age.     

Calculating Impact Factor: How Bibliographical Classification of Journal Items Affects the Impact Factor of Large and Small Journals

As bibliographical classification of published journal items affects the denominator in this equation, we investigated how the numerator and denominator of the impact factor (IF) equation were generated for representative journals in two categories of the Journal Citation Reports (JCR). We performed a full text search of the 1st-ranked journal in 2004 JCR category “Medicine, General and Internal” (New England Journal of Medicine, NEJM, IF = 38.570) and 61st-ranked journal (Croatian Medical Journal, CMJ, IF = 0.690), 1st-ranked journal in category “Multidisciplinary Sciences” (Nature, IF = 32.182) and journal with a relative rank of CMJ (Anais da Academia Brasileira de Ciencias, AABC, IF = 0.435). Large journals published more items categorized by Web of Science (WoS) as non-research items (editorial material, letters, news, book reviews, bibliographical items, or corrections): 63% out of total 5,193 items in Nature and 81% out of 3,540 items in NEJM, compared with 31% out of 283 items in CMJ and only 2 (2%) out of 126 items in AABC. Some items classified by WoS as non-original contained original research data (9.5% in Nature, 7.2% in NEJM, 13.7% in CMJ and none in AABC). These items received a significant number of citations: 6.9% of total citations in Nature, 14.7% in NEJM and 18.5% in CMJ. IF decreased for all journals when only items presenting original research and citations to them were used for IF calculation. Regardless of the journal’s size or discipline, publication of non-original research and its classification by the bibliographical database have an effect on both numerator and denominator of the IF equation. Preliminary results of the study were presented at the 2006 ORI Research Conference on Research Integrity, Tampa, FL, December 1–3, 2006.     

How Are Traits Related to Problem Behavior in Preschoolers? Similarities and Contrasts Between Temperament and Personality

The lack of empirical research relating temperament models and personality hinders conceptual integration and holds back research linking childhood traits to problem behavior or maladjustment. This study evaluates, within a sample of 443 preschoolers, the relationships between children’s maladaptation and traits measured by three temperament models (Thomas and Chess, Buss and Plomin, and Rothbart), and a Five-Factor based personality model. Adequate reliabilities and expected factor structures are demonstrated for most scales. A joint principal component analysis combining 28 temperament and 18 personality scales indicates a six-factor model, distinguishing Sociability, Activity, Conscientiousness, Disagreeableness, Emotionality, and Sensitivity. Regression analyses reveal that although single temperament and personality scales explain from 23% to 37% of problem behavior variance, the six components explain from 41% to 49% and provide a clearer differentiation among CBCL-problem scales. This age-specific taxonomy refines and corroborates conclusions based on narrative reviews and furnishes a more balanced view of trait–maladjustment relationships.

Family criticism and self-starvation: a study of expressed emotion

The measure Expressed Emotion (EE) has been established as an exceptionally useful indicator of relapse in people with schizophrenia and depression. EE is now also being applied more broadly for the investigation of other disorders. EE is usually rated by conducting the Camberwell Family Interview, i.e. in the course of separate individual interviews with the relatives of the symptomatic individuals. This paper reports the rating of EE in adolescents with eating disorders within a semi-structured family schedule - the Standardized Clinical Family Interview. Consecutive referrals for eating disorders were assessed prior to family therapy and again at regular intervals during therapy. EE ratings for this sample, the prognostic value of EE, and the changes in EE that took place during the course of therapy are presented and their clinical implications discussed. The findings suggest that even low levels of Critical Comments from the parents to the anorexic adolescent are associated with continuing symptoms.