Stress-induced Fos-like Immunoreactivity in the Pons and the Medulla Oblongata of Rats

Immunoreactivity of the immediate early gene c-fos was used to investigate changes in the activity of brainstem neurons in response to acute stressors like immobilization, formalin-induced pain, cold exposure, hemorrhage and insulin-induced hypoglycemia. Different stressors induced Fos-like immunoreactivity in different pontine and medullary neurons. A single, 3 hour immobilization was found to be a very strong stimulus that activated brainstem catecholaminergic (tyrosine hydroxylase-immunopositive) neurons and cells in the raphe and certain pontine tegmental nuclei, as well as in the reticular formation. Pain, induced by a subcutaneous injection of formalin was also effective on catecholamine-synthesizing neurons and on others cells in the nucleus of the solitary tract. Cold exposure activated cells mainly in the sensory spinal trigeminal and parabrachial nuclei and in the so-called "pontine thermoregulatory area". Moderate Fos-like immunoreactivity was induced by a hypotonic (25%) hemorrhage in medullary catecholaminergic neurons, the nucleus of the solitary tract and the Barrington nucleus. Among stressful stimuli used, insulin-induced hypoglycemia elicited the smallest Fos activation in the lower brainstem. The present observations indicate that different stressors may use different neuronal pathways in the central organization of the stress response.     

Suicide in the Israeli army

The present study was an attempt to analyze the problem of suicide in the Israel Defense Forces (IDF). Suicide is increasing among populations aged 18-21, which in Israel is the age when most young people are called up for a 3-year period of compulsory military service. The service may have a catalytic effect on suicide. but on the other hand may serve as a control mechanism reducing suicide. The study used data for the period 1974-1985, and examined suicide in combat and noncombat units by duration of service and by preservice psychiatric, medical, and motivational data. The suicide groups were also compared with a matched sample of nonsuicide groups along the relevant variables. The findings seem to be consistent with some established theoretical perspectives of situational stress, social support, and status incompatibility, and seem to bear practical implications for the reduction of suicide.     

Psychologists' and social workers' self-descriptions using DSM-IV psychopathology

There is limited information on mental health of psychologists and social workers despite their rendering mental health services, so their subjective perception of mental disorder was explored via a self-evaluation survey in which they self-diagnosed the presence of DSM-IV disorders within themselves. The sample of 128 professionals included 63 psychologists and 65 social workers. The presence of Axis I traits was reported by 81.2%, the three most frequent traits being mood, obsessive-compulsive disorder, and eating disorder. Axis II traits were reported by 73.4% of subjects, the three most frequent conditions being narcissistic, avoidant, and obsessive-compulsive personality traits. While a high percentage of subjects reported the presence of either an Axis I or Axis II disorder, the average severity reported was low. More psychologists reported on mood, social phobia, and eating problems than social workers, while the latter reported more on psychotic problems. Psychologists reported more Axis II traits, especially paranoid, narcissistic, and avoidant subtypes. More women than men reported eating problems, while more men reported schizoid and avoidant personality traits. In conclusion, manifestations of subthreshold psychiatric conditions were prominently reported. These findings suggest encouraging mental health care professionals to explore treatment for problems if present.     

Automatic comparisons of artificial digits never compared: learning linear ordering relations

In 2 experiments, participants were trained to perform magnitude decisions, that is, decide which of 2 arbitrary symbols in a pair represented a larger magnitude. The symbols corresponded to locations on an implicit linear scale. Training resulted in a Stroop-like size congruity effect when the participants had to decide which symbol in a pair was physically larger. This effect, showing automaticity of the processing of magnitude relations, was also obtained for pairs never encountered during practice. The implications of these findings for processing of magnitude relations and for theories of automaticity are discussed.     

Differentiating anxious,aggressive, and socially competent preschool children: validation of the Social Competence and Behavior Evaluation-30 (parent version)

The present study examined the factor structure, internal consistency, and construct validity of the parent version of the Social Competence and Behavior Evaluation-30 for preschoolers (SCBE-30; LaFreniere, P. J. (1990). Social competence and behavior evaluation-30. Unpublished measure.), an adaptation of the validated teacher version of the same measure (LaFreniere & Dumas, Psychol. Asses. 8 (1996) 369). The parent version of the SCBE-30 is a 30-item Likert rating scale questionnaire designed to assess patterns of anxiety/withdrawal, anger/aggression, and social competence. Principal components analysis was used to identify the factor structure of the parent version of the SCBE-30 (N = 218 preschool children). To assess construct validity, a compliance task was utilized to determine whether children identified as high on anxiety/withdrawal, anger/aggression, or social competence with the parent version of the SCBE-30 (n = 20 for each group) could be distinguished behaviorally on several observational variables. Principal components analysis identified three factors accounting for 44% of the variance. Ten items positively loaded onto each factor and matched conceptual expectations. A between-subjects MANOVA demonstrated significant group differences in observed child behaviors including compliance, noncompliance, subtypes of noncompliance, and aversive behavior. Results of the current study suggested that the parent version of the SCBE-30 demonstrated both internal consistency and construct validity, and findings paralleled many of the results from LaFreniere and Dumas' validation of the teacher version of the SCBE-30.     

Predictive validity of callous-unemotional traits measured in early adolescence with respect to multiple antisocial outcomes

This study investigated the predictive validity of youth callous-unemotional (CU) traits, as measured in early adolescence (Grade 7) by the Antisocial Process Screening Device (APSD; Frick & Hare, 2001), in a longitudinal sample (N = 754). Antisocial outcomes, assessed in adolescence and early adulthood, included self-reported general delinquency from 7th grade through 2 years post-high school, self-reported serious crimes through 2 years post-high school, juvenile and adult arrest records through 1 year post-high school, and antisocial personality disorder symptoms and diagnosis at 2 years post-high school. CU traits measured in 7th grade were highly predictive of 5 of the 6 antisocial outcomes-general delinquency, juvenile and adult arrests, and early adult antisocial personality disorder criterion count and diagnosis-over and above prior and concurrent conduct problem behavior (i.e., criterion counts of oppositional defiant disorder and conduct disorder) and attention-deficit/hyperactivity disorder (criterion count). Incorporating a CU traits specifier for those with a diagnosis of conduct disorder improved the positive prediction of antisocial outcomes, with a very low false-positive rate. There was minimal evidence of moderation by sex, race, or urban/rural status. Urban/rural status moderated one finding, with being from an urban area associated with stronger relations between CU traits and adult arrests. Findings clearly support the inclusion of CU traits as a specifier for the diagnosis of conduct disorder, at least with respect to predictive validity.     

Digit Symbol Substitution test performance: sex differences in a Hebrew-readers' health population

The Digit Symbol Substitution test is simple to administer and sensitive to individual differences related to cognitive performance. The present study evaluated sex-related differences in performance by a Hebrew reading sample. The test was administered to 275 men and 252 women (age range: 20-44 years). Hebrew women significantly scored higher than the men. Means which increased during four consecutive 30-sec. time periods of performance, was significantly greater for the women than the men. This finding indicates women were more effective on this pair-associated learning task than men.     

Childhood Conduct Problems Trajectories are Associated with Distinct Antisocial Process Screening Device Dimensions

Journal of Psychopathology and Behavioral Assessment - There is ongoing debate regarding whether psychopathy dimensions (i.e., narcissism, callous-unemotional [CU] traits, and impulsivity) can be...     

Parental Loss and Family Violence as Correlates of Suicide and Violence Risk

Seventy-nine psychiatric inpatients were administered a battery of psychometric instruments that obtained information about early parental loss, exposure to family violence, and behavioral problems in themselves and in their first-degree relatives. These variables were correlated with suicide and violence risk measures. Suicide risk significantly correlated with all family variables whereas violence risk correlated with behavioral problems both in oneself and in one's first-degree relatives. Moreover, suicidal and/or violent patients had experienced maternal loss significantly more frequently than the nonsuicidal/nonviolent patients. In the suicidal/violent group, age of patient at death of parents was significantly lower than in the nonsuicidal/nonviolent group. Finally, family violence was significantly correlated with behavioral problems in self and in first-degree relatives. Findings are interpreted according to the authors' theoretical model of aggression regulation.