State IQ and suicide rates in the United States

Previous findings pertaining to the direction (positive or negative) of the ecological correlation between intelligence and suicide rates in the USA have been conflicting. Using novel state IQ estimates, derived from the Scholastic Assessment Test, the American College Test, these tests combined, or the National Assessment of Educational Progress state scores, these estimates were not consistently associated to state suicide rates. Whereas ACT-derived state IQ was significantly positively correlated with suicide rates, the correlation with composite ACT-SAT-derived state IQ was significantly negative and with both SAT-derived and NAEP-derived state IQ also negative but not significant. Validity checks pointed to possible methodological problems with the state IQ estimates. Currently available estimates of state IQ, therefore, seem not appropriate to resolve the question of the direction of the ecological correlation of intelligence and suicide mortality across the USA.     

Investigating a computerised test of the Stroop effect extended by inclusion of a third, more difficult task

A validation study of a computerised test recently developed involving the Stroop effect, extended here by inclusion of a third, more difficult test series, is presented. Three groups of men belonging to the Swedish armed forces and adjudged to differ in their qualifications (20, 32, and 19 men of levels 1, 2, and 3, respectively) and a fourth group of 18 men convicted of serious crimes of violence were given this test, termed the Stress Strategy Test. Discriminant analysis of the test's 12 variables (four for each of the three test series) yielded a discriminant power of 65% for the total group, highest for the level 1 group (80%) and for the nonmilitary group (72%), results substantially better than obtained for the original version of the test with use of similar subject groups.     

Locus of control, self-control, and family income as predictors of young children's mathematics and science scores

Locus of control, self-control, and family income were investigated as possible predictors of 138 young children's mathematics and science scores. The children, 60 boys and 78 girls, ranging from 4 to 8 years of age (M = 5.4, SD = 1.3) were administered the Stephens-Delys Reinforcement Contingency Interview Scale, the Self-control Rating Scale, the Comprehensive Mathematics Inventory, and a science test based on the work of D. K. Dickinson. Analysis showed mathematics scores were positively related to income, locus of control, and science scores. Mathematics and science scores were negatively related to lack of self-control. Also, science scores were positively related to locus of control. Multiple regression analysis with mathematics as the dependent variable indicated income had the greatest predictive value followed by self-control and locus of control. The multiple regression model of science was also significant, with locus of control having the greatest influence followed by self-control.     

Exploiting redundancy for flexible behavior: unsupervised learning in a modular sensorimotor control architecture

Autonomously developing organisms face several challenges when learning reaching movements. First, motor control is learned unsupervised or self-supervised. Second, knowledge of sensorimotor contingencies is acquired in contexts in which action consequences unfold in time. Third, motor redundancies must be resolved. To solve all 3 of these problems, the authors propose a sensorimotor, unsupervised, redundancy-resolving control architecture (SURE_REACH), based on the ideomotor principle. Given a 3-degrees-of-freedom arm in a 2-dimensional environment, SURE_REACH encodes 2 spatial arm representations with neural population codes: a hand end-point coordinate space and an angular arm posture space. A posture memory solves the inverse kinematics problem by associating hand end-point neurons with neurons in posture space. An inverse sensorimotor model associates posture neurons with each other action-dependently. Together, population encoding, redundant posture memory, and the inverse sensorimotor model enable SURE_REACH to learn and represent sensorimotor grounded distance measures and to use dynamic programming to reach goals efficiently. The architecture not only solves the redundancy problem but also increases goal reaching flexibility, accounting for additional task constraints or realizing obstacle avoidance. While the spatial population codes resemble neurophysiological structures, the simulations confirm the flexibility and plausibility of the model by mimicking previously published data in arm-reaching tasks.     

National intelligence and suicide rate across Europe: an alternative test using educational attainment data

National mean scores on a historical knowledge test (taken as a proxy for intelligence), stemming from representative samples of male (and female) 9th-grade school students from 26 European countries in a 1999 report by Wilberg and Lynn, were significantly positively associated with the national male (and female) suicide rates, independent of the general quality-of-living conditions in these countries. This finding replicates previous evidence from cross-national studies (by Lester and by Voracek), of a correspondence of higher national IQ to higher suicide rates, with an alternative measure of national IQ that is independent of the national IQ estimates recently published by Lynn and Vanhanen which have been used in prior studies.     

Cross-cultural comparison of motivation to learn in physical education: Japanese vs Swedish schoolchildren

The present study compared differences between Japanese and Swedish schoolchildren in learning motivation-related variables in physical education. The subjects were 1,562 Japanese fifth and sixth graders (776 boys and 786 girls) ranging in age from 10 to 12 years and 573 Swedish fifth graders (306 boys and 267 girls) from 10 to 13 years (M = 11.4, SD = 0.5). They completed three questionnaires to evaluate the children's learning motivation, factors supporting motivation to learn, and preferences of learning behavior. The questionnaires were taken from Nishida's Diagnosis of Learning Motivation in Physical Education Test, a multidimensional and comprehensive test that measures learning motivation. A 2 x 2 (country by sex) multivariate analysis of variance indicated both Swedish boys and girls scored significantly higher than the Japanese children on most subscales. Results were discussed in relation to differences in the sports environment and culture of the two countries.     

Psychometric properties and correlates of the Lester-Bean Attribution of Causes to Suicide Scale (German form)

Psychometric properties and correlates of the German form of Lester and Bean's 1992 Attribution of Causes to Suicide Scale, of 18 items tapping into lay theories of suicide (intrapsychic problems, interpersonal conflicts, and societal forces as causes), were investigated in a sample of the general population in Austria (n=156). The three attributional dimensions presented moderate internal consistencies and the 18 items appeared to be factorially orderly, as indicated by exploratory factor analysis. Previous results were replicated, with positive interrelations among all three dimensions, but these were largely confined to men. Societal causes of suicide were significantly less frequently endorsed than intrapsychic or interpersonal causes. Respondents' sex, intelligence, and knowledge about suicide were unrelated, and scores on the Big Five personality factors and social desirability were largely unrelated to the three dimensions. Endorsing intrapsychic causes to suicide was correlated with advanced age, religiosity, and conservative political orientation, and the three dimensions entertained meaningful associations with locus of control (internality, social externality, and fatalistic externality). All observed demographic and attitudinal correlates were, however, of modest magnitude. Implications of the findings and directions for further inquiry are discussed.     

Suggestion overrides the Stroop effect in highly hypnotizable individuals

Cognitive scientists distinguish between automatic and controlled mental processes. Automatic processes are either innately involuntary or become automatized through extensive practice. For example, reading words is a purportedly automatic process for proficient readers and the Stroop effect is consequently considered the "gold standard" of automated performance. Although the question of whether it is possible to regain control over an automatic process is mostly unasked, we provide compelling data showing that posthypnotic suggestion reduced and even removed Stroop interference in highly hypnotizable individuals. Drawing on a large sample of highly hypnotizable participants, we examined the effects of suggestion on Stroop performance both with and without a posthypnotic suggestion to perceive the input stream as meaningless symbols. We show that suggestion administered to highly hypnotizable persons significantly reduced Stroop interference and derailed a seemingly automatic process.     

Health Beliefs and Behaviors of Women Who Have Received Genetic Counseling For Breast Cancer

There are both genetic and behavioral risk factors for breast cancer, but the interaction between these factors is not clear. Little is known about the impact of receiving genetic risk information for breast cancer on behaviors such as diet and physical activity. Seven focus groups were conducted with 23 women who had recently received genetic counseling for breast cancer, in order to explore health beliefs and behaviors following genetic counseling. Findings revealed that there was much confusion and uncertainty about the associations between health behaviors and breast cancer risk, and participants reported that receiving genetic counseling had little impact on health protective behaviors. Further research is required to understand variation in response to genetic risk information, and to assess the impact of providing additional information regarding lifestyle factors.