CSF 5-HIAA Predicts Suicide Risk After Attempted Suicide

Suicide risk after attempted suicide, as predicted by cerebrospinal fluid (CSF) monoamine metabolite concentrations, was studied in a sample of 92 psychiatric mood disorder inpatients admitted shortly after attempting suicide. The potential of the serotonin metabolite 5-hydroxyindoleacetic acid (5-HIAA) in the CSF to predict suicide risk within the first year after attempted suicide was studied by means of survival analysis after median split sub-grouping. Eleven patients (12%) committed suicide within 1 year after attempted suicide. Eight of these belonged to the below-the-median (< 87 nM) CSF 5-HIAA subgroup, that is, the suicide risk was 17% as compared with 7% among those with above-the-median CSF 5-HIAA. The cumulative number of survived patient-months during the first year after attempted suicide was significantly lower in the low CSF 5-HIAA subgroup. It was concluded that low CSF 5-HIAA predicts short-range suicide risk after attempted suicide in mood disorder psychiatric inpatients. These findings lend further support to the serotonin hypothesis of suicide risk.     

Self-Reported Alcohol Expectancies and Postdrinking Sexual Inferences About Women1

In evaluating dating scenarios, perceivers tend to infer more sexual responsiveness for drinking than nondrinking daters. The origin of these postdrinking sexual inferences has not previously been examined. In the present study, we considered whether perceivers' alcohol expectancies would influence these inferences. Male and female subjects completed a brief expectancy measure, read a vignette depicting a beer-drinking or cola-drinking woman, and evaluated the targeted woman. Multiple-regression equations were computed to test a replication hypothesis and an interaction hypothesis. In support of the replication hypothesis, subjects rated the beer-drinking woman as more sexual than her cola-drinking counterpart. In support of the interaction hypothesis, male but not female subjects exhibited the predicted expectancy by drink interaction. High expectancy men but not low expectancy men rated the beer-drinking woman as more likely to engage in sexual behaviors than the cola-drinking woman. This finding was evident on behaviorally specific measures, but not on trait-like measures. The roles of stereotypes and alcohol expectancies as determinants of post-drinking sexual inferences are discussed.     

Facilitating memory‐based lie detection in immediate and delayed interviewing: The role of mnemonics

We experimentally investigated how different mnemonic techniques employed in an interview conducted immediately after an event affected truth tellers' and liars' responses when they were interviewed again after a 2‐week delay. We also compared how verbal accounts changed over time within truth tellers and liars, and how consistent both groups were. Participants (n = 143) were shown a mock intelligence operation video and instructed either to tell the truth or lie about its contents in two interviews, one of which was immediately after watching the video and the other after a 2‐week delay. In the immediate interview, they were asked to provide a free recall and then asked to provide further information via one of three mnemonics: context reinstatement, sketch, or event‐line. In the delayed interview, they were asked to provide only a free recall. Truth tellers reported more visual, spatial, temporal, and action details than did liars both immediately and after a delay. Truth tellers experienced more of a decline in reporting details after a delay than did liars, and this decline was affected by the mnemonic used. Truth tellers thus showed, more than liars, patterns of reporting indicative of genuine memory decay. Liars produced patterns of a “stability bias” instead. Truth tellers and liars were equally consistent between their immediate and delayed statements.     

Leiter-3 generalizability in Scandinavia

The Leiter-3 is a nonverbal assessment that evaluates cognitive abilities and has been adapted for use in Scandinavia. Generalizability of United States-based normative scoring for use with the Scandinavian population was evaluated. Leiter-3 scores from a sample of Scandinavian students were compared with scores obtained from the Leiter-3 standardization sample, controlling for confounding variables, across ages, using mixed-methods analysis. A Scandinavian-population-based sample was created from Leiter-3 standardization data and norms were constructed and were used to generate standardized scores from the sample data. Results suggest that overall the Scandinavian test-takers score higher than American test-takers, but that differences between groups were minimized when controlling for factors that may influence cognitive performance. Creating Scandinavian based scores was not effective at reducing gaps in performance, suggesting that differences in performance between the different populations may be attributable to factors other than those typically controlled for when constructing standardized tests. Implications of these results and recommendations for Leiter-3 adaptation are reviewed.     

Factors affecting conditional discrimination learning by pigeons

In Experiment 1 (within subjects) and Experiment 2 (between subjects) it was shown that the sequential training of pigeons on a color discrimination and then on its reversal, each in a different floor-tilt/texture context, failed to produce conditional control of discriminative performance by those contexts. Daily alternation between the two problems (with correlated contexts) was successful, however. In each of these experiments conditional control was better reflected in generalization test performance in extinction than during sessions of training with reinforcement.     

On the consistency of intramodal intensity matching in olfaction

Magnitude matchings of odor intensity were obtained for three chemical compounds (hydrogen sulfide, pyridine, and dimethyl disulfide) in four experiments. An equal-sensation function in the form of a power function described the data well. This equation can be written neglecting the multiplicative constant, Ф_i = Ф_k ^b _ik, where i and k represent two different odorants. The exponent b_ik, where the first index stands for matching continuum and the second index for reference continuum, was fairly well predicted according to the formulae, (ie, 264, 2) where i, j, and k are three different odorants. The results validate the equal-sensation function and indicate implicitly that intensity matchings between different intramodal continua are approximately transitive and symmetric with respect to odor.     

Smoking among Norwegian schoolchildren 1975–1980

A comprehensive research project on smoking among Norwegian schoolchildren was started in 1975. Results from two nation-wide questionnaire surveys and from two field experiments were presented. The first field experiment (1978) demonstrated that different approaches to smoking and health education had different effects on the pupils' reported tobacco consumption. In three of four experimental groups, the reported short-term reduction of cigarettes smoked was statistically significant. If the pupils were actively involved, and when their parents were involved, the reported reduction of cigarettes smoked was 21 % compared to only 6% in a group with passive pupils and no involvement of the parents. In a second field experiment (1979-80), a long-term reduction was shown. During the first six months there was a marked decrease in the prevalence of smokers. Compared with a control group, the effect still remained after one year. In the period 1975–1980, a new trend in smoking among young people in Norway was recorded. Irrespective of grade and sex, the proportion of young people smoking daily decreased. The decrease was somewhat stronger for girls than for boys.     

From student to superhero: Situational primes shape future helping

The present research uses priming techniques to modify commitment to and engagement in future helping behavior. Relative to a control condition, people primed with the exemplar Superman saw themselves as less likely (Studies 1a and 1b), and participants primed with the category superhero saw themselves as more likely (Study 1a), to help in hypothetical situations. Study 2 extended these effects to real-world planned helping behavior, by demonstrating that these primes impacted commitment to future volunteerism. Finally, Study 3 showed that these changes in initial commitment impacted volunteering behavior up to three months after initial exposure. These results demonstrate that fleeting situational primes can impact not only spontaneous behavior, but also future behavior.