The effect of timing of a perturbation on the execution of a lifting movement

Anticipation to the mass magnitude is important in lifting, but underestimation of a mass, in contrast to overestimation, does not cause major movement disturbances. This may be caused by corrections in muscle activity before the object is actually lifted. This study was designed to assess the importance of these corrections during the loading phase for the execution of a lifting movement when the mass is underestimated. Ten subjects lifted a box (1.6 kg), of which the mass was increased by 10 kg without them knowing so. The mass was added either before the box had been lifted from the ground (perturbation before lift-off, PBL) or right perturbation after lift-off (PAL). In the PBL condition back muscle activity was increased before lift-off. Even though this early corrective response could obviously not occur in the PAL condition, the lifting movement was executed without clear problems. In sum, corrections in muscle activity before lift-off are not necessary for adequate correction of a perturbation induced by an unexpected heavier object.     

Fear of storms and hurricanes in Antillean and Belgian children

The present study assessed fear of hurricanes in children who had been confronted with this natural event (i.e., Antillean children, n=161). Their fear levels were compared to those of children who are unfamiliar with such an event (i.e., Belgian children, n=185). Antillean children reported significantly higher levels of fear of storms than Belgian children did, thus providing support for the notion that exposure to dangerous events promotes children's fears of those events. Surprisingly, however, Antillean children had lower scores on the 'Hurricanes' item than Belgian children. Plausibly, differences in how children interpreted this item may have accounted for this unexpected finding. That is, ratings of Antillean children were probably based on actual experiences with hurricanes, whereas scores of Belgian children presumably reflected appraisal of threat in case they would be confronted with such an event. Implications of this finding for the assessment of childhood fears are briefly discussed.     

Dogs' (Canis familiaris) responsiveness to human pointing gestures

In a series of 3 experiments, dogs (Canis familiaris) were presented with variations of the human pointing gesture: gestures with reversed direction of movement, cross-pointing, and different arm extensions. Dogs performed at above chance level if they could see the hand (and index finger) protruding from the human body contour. If these minimum requirements were not accessible, dogs still could rely on the body position of the signaler. The direction of movement of the pointing arm did not influence the performance. In summary, these observations suggest that dogs are able to rely on relatively novel gestural forms of the human communicative pointing gesture and that they are able to comprehend to some extent the referential nature of human pointing.     

Behavioral activity associated with onset in chronic tic and habit disorder

Seventy-six people (aged 18-62 years) diagnosed with either a chronic tic disorder or a habit disorder, entering a treatment study, kept a baseline daily diary for at least ten days, noting tic frequency and activity at time of onset. Together with an evaluator, participants completed a form ranking three high-risk activities where the tic or habit was likely to appear, and three low-risk activities where the tic was absent or barely present. Subjective appraisals distinguishing the two types of activities were also elicited and their relevance to the tic was measured on a seven-point scale using an adaptation of Kelly's repertory grid technique. Overall, the most frequent high-risk and low-risk activities were, respectively, passive attendance and physical activity. There were, however, significant differences in types of high-risk activities amongst the tic and habit disorders. Conversely, appraisals of the high-risk activities seemed to center on negative evaluations of tenseness, boredom, dissatisfaction, and disinterest.     

Does social dominance generate prejudice? Integrating individual and contextual determinants of intergroup cognitions

Social dominance orientation (SDO) has been proposed as an important variable in the explanation of prejudice. We distinguish between three conceptualizations of SDO: SDO as a personality trait (personality model), SDO as a moderator of the effects of situational variables (Person x Situation model), and SDO as a mediator of the effect of social position on prejudice (group socialization model [GSM]). Four studies (N = 1.657) looking at the relations between social positions, SDO, and prejudice in a natural setting and in a laboratory setting provide strong support for the GSM. In contrast to previous correlational findings, there is evidence of a cause (dominant social position), an effect (prejudice increases), and a mediator (SDO). These results suggest new perspectives on the integration of individual and contextual determinants of prejudice.     

Uptake of BRCA1 Genetic Testing in Adult Sisters and Daughters of Known Mutation Carriers in Norway

This study was undertaken to examine transmission of information to first-degree relatives of BRCA1 mutation carriers and uptake of genetic testing. The intention was to consider revision of current legislation related to privacy if information on life-saving health care was not disseminated to at-risk family members. The Norwegian Radium Hospital provides clinical genetics services for families at high risk for hereditary breast and ovarian cancer. Together with major hospitals nationwide we provide medical surveillance. Nearly all expenses are covered by the National Health insurance. Because of the high number of families with founder mutations in BRCA1, we are in a unique position to gather information about these groups. Within a consecutive series, we identified 75 BRCA1 mutation carriers and registered information transmission and uptake of genetic testing 6 months or more after the index mutation carriers had been informed about their mutation status. These 75 BRCA1 mutation carriers had 172 living first-degree relatives, aged 18 years or older (84 females, 88 males). Forty-four out of 54 (81.5%) of females over 30 had opted for genetic testing. The testing rate among all relatives was 43%. At any age, 63% of the females underwent genetic testing compared with 24% of the males (p<0.05). The overwhelming majority of adult females at risk opted for genetic testing. Males with daughters more frequently than males without daughters asked for testing. The findings give neither reason to reconsider legislation on privacy, nor for us to consider more aggressive methods of contacting relatives.     

An effective strategy for integrating ethics across the curriculum in engineering: An ABET 2000 challenge

This paper describes a one-day workshop format for introducing ethics into the engineering curriculum prepared at the University of Puerto Rico at Mayagüez (UPRM). It responds to the ethics criteria newly integrated into the accreditation process by the Accreditation Board of Engineering and Technology (ABET). It also employs an ethics across the curriculum (EAC) approach; engineers identify the ethical issues, write cases that dramatize these issues, and then develop exercises making use of these cases that are specially tailored to mainstream engineering classes.The different activities and strategies employed in this workshop are set forth. Specific references are made to the cases and exercises developed as a result of these workshops. The paper ends by summarizing the different assessments made of the workshop by addressing the following questions: how did it contribute to the overall ABET effort at UPRM; could other universities benefit from a similar activity; and how did the participants evaluate the workshop?     

Vom Verhältnis zwischen Psychosomatik und Verhaltensmedizin

Ohne Zusammenfassung     

(-)-9-Dehydrogalanthaminium bromide,a new cholinesterase inhibitor,enhances place and object recognition memory in young and old rats

In a previous study, we showed that (-)-9-dehydrogalanthaminium bromide, a synthetic galanthamine derivative, was more potent than galanthamine in inhibiting acetylcholinesterase. We studied here the action of this new compound on recognition memory in young and old rats, using a two-trial recognition task designed to test both place and object recognition. (-)-9-dehydrogalanthaminium bromide was injected (0.3, 1, and 3 mg/kg, i.p.) in young and old rats before the acquisition phase, immediately after it, or before the retrieval phase of the task, in order to determine the stage of information processing affected by the compound. (-)-9-dehydrogalanthaminium bromide improved both place and object recognition in young rats, via an enhancement of acquisition (3 mg/kg: place recognition; 1 and 3 mg/kg: object recognition) and consolidation (1 and 3 mg/kg) information processing. In old rats, (-)-9-dehydrogalanthaminium bromide improved performance by acting on the acquisition processes of place (0.3, 1, and 3 mg/kg) and object (1 and 3 mg/kg) recognition. These results provide information on the profile of activity of (-)-9-dehydrogalanthaminium bromide on memory processes, and suggest that this new compound could have utility in the treatment of cognitive dysfunction occurring in Alzheimer's disease or in the normal course of aging.     

Social categorization and fear reactions to the September 11th terrorist attacks

Two experiments were run in The Netherlands and Belgium 1 week after the terrorist attacks against the World Trade Center in New York on September 11, 2001. The aim was to investigate whether social categorization affected emotional reactions, behavioral tendencies, and actual behaviors. Results showed that focusing participants' attention on an identity that included American victims into a common ingroup led them to report more fear and stronger fear-related behavioral tendencies and to engage more often in fear-related behaviors than when victims were categorized as outgroup members. Results are discussed with respect to appraisal theories of emotion and E. R. Smith's model of group-based emotions.