Changes in the gangliosides of erythrocyte membranes of schizophrenic patients

The pattern of gangliosides in membranes of erythrocytes was examined in healthy donors, in acute schizophrenics without neuroleptic treatment and in alcohol-dependent patients. 7 different gangliosides could be detected after extraction, purification by column chromatography and fractionation by TLC. Healthy donors were characterized by the following pattern of gangliosides: GX = 5.8%, GT1b = 6.7%, FucGD1b = 5.2%, und GD1a = 12.6%, GD3 = 9.2%, SPG = 43.5% and GM3 = 17.0%. In schizophrenic patients the GM3- and GD3-fraction were increased. No difference was found between the control group and the alcoholics.     

Violent delinquency: an examination of psychopathic typologies

This study sought to determine the combined effects of psychopathy, low intellectual functioning, and love deprivation on violent delinquency. Low-intellectual-functioning psychopaths were significantly more violent than were low or high-intellectual-functioning nonpsychopaths or high-intellectual-functioning psychopaths. Love deprivation was more strongly related to violence than was psychopathy/intellectual functioning, and severely love-deprived, low-intellectual-functioning psychopaths were the most violent.     

Gender Differences in the Accuracy of Grade Expectancies and Evaluations

Participants were 131 (69 women, 62 men)students in Introductory Psychology, Social Psychology,and Computer Science courses. Eighty-six percent of thesample was Caucasian. The goals of this study were to assess (a) how accurate students'preexamination expectancies and postexamination gradeevaluations are and whether gender differences in theaccuracy of expectancies and grade evaluations onexaminations exist, (b) whether expected grades predictpostexamination grade evaluations even with actualgrades controlled (self-consistency effect), and (c)whether students' grade expectations and evaluationsbecome more accurate with experience. Throughout thecourse of a semester, students estimated their gradesfor each of their examinations. Students overestimatedtheir grades at all points in the semester, although women in Introductory Psychology overestimatedtheir grades less than men did. Students' expectedgrades were a better predictor of their postexaminationgrade evaluations than were their actual grades. For Introductory Psychology students,expectancies and grade evaluations became more accurateas the semester progressed. The importance of accurateself-perceptions regarding academic performance isdiscussed.     

Regional blood flow changes in the left cerebral hemisphere during word pair learning and recall

Regional cerebral blood flow measurements were made in the left hemisphere of 11 young healthy volunteers during learning and during recalling of word pair associates. Compared to the resting baseline, both tasks caused significant increases of average hemispheric flow, indicating an elevated neuronal activity level. Regionally both tasks were accompanied by considerable activation of parietal and occipital regions. The main difference between learning and recalling was that only the former task activated the prefrontal regions.     

Regional cerebral blood flow and verbal memory after chronic exposure to organic solvents

Regional cerebral blood flow (rCBF; 133Xe-inhalation method) was investigated in 32 industrial workers (age: 51 +/- 9 years) who had been exposed to organic solvents during an average of 24.5 years. The measurements were made at rest and during learning of associated word pairs. The resting flow level was 17% lower than expected for normal subjects of similar age and the activation-induced changes of rCBF during the test lacked the frontal activation normally seen. Significant correlations between age, length of exposure, and rCBF level were found. In order to control for the age factor, results were also calculated from two subgroups of similar age but with very different levels of exposure (13 and 31 years of average exposure). The two groups differed only slightly in resting rCBF. A marked difference was, however, seen during activation, with significant post-central flow increases recorded in the lower-exposed group only. The results indicate the potential of the rCBF method for elucidating functional cortical changes related to neurotoxic effects of organic solvents.     

The Genesis of Hannah Arendt’s Conception of Human Rights

This paper traces the development of Hannah Arendt’s thought on human rights between 1949 and 1958. Pace readers of Arendt who stress the unity of her thought as well as Arendt’s own proclamation to have not edited her works significantly, the paper shows that Arendt introduced a significant number of changes (of both major and minor character) into her writings on human rights. The most important of these changes is that the idea that a comity of nations may guarantee the right to have rights is, with time, abandoned. The paper further shows that many changes that Arendt makes can be explained by the different audiences Arendt addresses and that a significant number of the changes are due to the fact that Arendt worked in different languages. Accordingly, the German versions of her writings can be used to illuminate unclarities in the English versions of her texts and vice versa.