Transformational leadership and group interaction as climate antecedents: a social network analysis

In order to test the social mechanisms through which organizational climate emerges, this article introduces a model that combines transformational leadership and social interaction as antecedents of climate strength (i.e., the degree of within-unit agreement about climate perceptions). Despite their longstanding status as primary variables, both antecedents have received limited empirical research. The sample consisted of 45 platoons of infantry soldiers from 5 different brigades, using safety climate as the exemplar. Results indicate a partially mediated model between transformational leadership and climate strength, with density of group communication network as the mediating variable. In addition, the results showed independent effects for group centralization of the communication and friendship networks, which exerted incremental effects on climate strength over transformational leadership. Whereas centralization of the communication network was found to be negatively related to climate strength, centralization of the friendship network was positively related to it. Theoretical and practical implications are discussed.     

Hemispheric sensitivities to lexical and contextual information: evidence from lexical ambiguity resolution

The present study examined the manner in which both hemispheres utilize prior semantic context and relative meaning frequency during the processing of homographs. Participants read sentences biased toward the dominant or the subordinate meaning of their final homograph, or unbiased neutral sentences, and performed a lexical decision task on lateralized targets presented 250ms after the onset of the sentence-final ambiguous prime. Targets were either related to the dominant or the subordinate meaning of the preceding homograph, or unrelated to it. Performance asymmetry was found in the absence of a biasing context: dominant-related targets were exclusively facilitated in the RVF/LH, whereas both dominant- and subordinate-related targets were facilitated in the LVF/RH. Performance symmetry was found in the presence of a biasing context: dominant-related targets were exclusively activated in dominant-biasing contexts, whereas both dominant- and subordinate-related targets were facilitated in subordinate-biasing contexts. The implications of the results for both general and hemispheric models of word processing are discussed.     

Suicidal ideation versus suicidal obsession: a case report

This case report illustrates the relationship between stress and obsessive-compulsive disorder (OCD) by describing an unusual case of OCD sequelae following a suicide attempt. The patient is a 29-year-old married woman who suffered a major depressive episode without OCD and tried to commit suicide by drinking household cleaner. Following the attempt, violent obsessive thoughts of harming herself and others emerged along with avoidance behavior. After exposure therapy, there was a decrease in her obsessive thoughts, less anxiety, and no avoidance behavior. This report highlights not only the existence of "posttraumatic obsession" but also the importance of accurate interpretation of suicidal preoccupation, leading to the diagnosis of OCD rather then suicidal ideation secondary to depression.     

Obsessive-compulsive disorder: boundary issues

The boundaries between obsessive-compulsive disorder (OCD) and other neuropsychiatric disorders remain unresolved and may well differ from one disorder to another. Endophenotypes are heritable, quantitative traits hypothesized to more closely represent genetic risk for complex polygenic mental disorders than overt symptoms and behaviors. They may have a role in identifying how closely these disorders are associated with another and with other mental disorders with which they share major comorbidity. This review maps the nosological relationships of OCD to other neuropsychiatric disorders, using OCD as the prototype disorder and endophenotype markers, such as cognitive, imaging, and molecular data as well as results from demographic, comorbidity, family, and treatment studies. Despite high comorbidity rates, emerging evidence suggests substantial endophenotypic differences between OCD and anxiety disorders, depression, schizophrenia, and addictions, though comparative data is lacking and the picture is far from clear. On the other hand, strong relationships between OCD, Tourette syndrome, body dysmorphic disorder, hypochondriasis, grooming disorders, obsessive-compulsive personality disorder, and pediatric autoimmune neuropsychiatric disorders associated with streptococcus are likely. Studies designed to delineate the cause, consequences, and common factors are a challenging but essential goal for future research in this area.     

The psychometric properties of the Hebrew version of Cloninger's Tridimensional Personality Questionnaire

The Hebrew Tridimensional Personality Questionnaire was administered to over a thousand individuals in the community, 16–78 years of age. Factor analysis was run first on individual items, and then on the 12 sub-scales described by [Cloninger, C.R., Pryzbeck, T.R., & Svrakic, D.M. (1991). The TPQ: US normative data. Psychological Reports, 69, 1047–1051)]. The factor analyses were restricted to four orthogonal factors in order to attempt confirmation of the corrected four-factor solution [Stallings, M.C., Hewitt, J.K., Cloninger, R.C., Heath, A.C., & Eaves, L.J. (1996). Genetic and environmental structure of the TPQ: three or four temperament dimensions? Journal of Personality and Social Psychology, 70 (1), 127–140)]. In the individual item analysis four orthogonal factors recognizable as Novelty Seeking, Reward Dependence, Harm Avoidance and Persistence emerged. However only up to half of the items originally ascribed to each factor loaded sufficiently and exclusively on the appropriate factor. When the 12 sub-scales were entered into factor analysis the four orthogonal factors were produced, and the structure satisfactorily confirmed. A few exceptions to orthogonality were observed. The data were analyzed for sex differences and age effects. Women scored higher than men did on most sub-scales of Harm Avoidance and Reward Dependence. The younger group (up to 21 years of age) scored higher on Novelty Seeking and Reward Dependence and lower on Harm Avoidance than the older group, but no sex by age interaction was detected. Preliminary normative Israeli data are supplied, and implications of the group differences discussed.     

Effects of energy availability on immediate and delayed emotional reactions to work events

This study focuses on daily work events as proximal stimuli for discrete emotional reactions and suggests that availability of energy resources required for coping with goal-disruptive events, or for capitalizing on new opportunities offered by goal-enhancing events, influences intensity of emotional reactions. Using experience-sampling methodology with a sample of hospital residents, it is shown that negative emotion and fatigue following disruptive events are intensified when only limited energy resources are available due to current workload. However, positive emotions, promoted by goal-enhancing events, are mitigated due to inability to capitalize on new opportunities or challenges. Aftereffects of work events reveal that the energizing effect of goal-enhancing events mitigates end-of-day fatigue and negative emotion on high-workload days, although the effect of disruptive events is diminished by the end of such days, apparently because of lesser conspicuity against a background of high workload. Theoretical and practical implications are discussed.