Mechanisms and neural basis of object and pattern recognition: a study with chess experts

Comparing experts with novices offers unique insights into the functioning of cognition, based on the maximization of individual differences. Here we used this expertise approach to disentangle the mechanisms and neural basis behind two processes that contribute to everyday expertise: object and pattern recognition. We compared chess experts and novices performing chess-related and -unrelated (visual) search tasks. As expected, the superiority of experts was limited to the chess-specific task, as there were no differences in a control task that used the same chess stimuli but did not require chess-specific recognition. The analysis of eye movements showed that experts immediately and exclusively focused on the relevant aspects in the chess task, whereas novices also examined irrelevant aspects. With random chess positions, when pattern knowledge could not be used to guide perception, experts nevertheless maintained an advantage. Experts' superior domain-specific parafoveal vision, a consequence of their knowledge about individual domain-specific symbols, enabled improved object recognition. Functional magnetic resonance imaging corroborated this differentiation between object and pattern recognition and showed that chess-specific object recognition was accompanied by bilateral activation of the occipitotemporal junction, whereas chess-specific pattern recognition was related to bilateral activations in the middle part of the collateral sulci. Using the expertise approach together with carefully chosen controls and multiple dependent measures, we identified object and pattern recognition as two essential cognitive processes in expert visual cognition, which may also help to explain the mechanisms of everyday perception.     

Gender differences on the Five to Fifteen questionnaire in a non‐referred sample with inattention and hyperactivity‐impulsivity and a clinic‐referred sample with hyperkinetic disorder

Lambek, R., Trillingsgaard, A., Kadesjö, B., Damm, D. & Thomsen, P. H. (2010). Gender differences on the Five to Fifteen questionnaire in a non‐referred sample with inattention and hyperactivity‐impulsivity and a clinic‐referred sample with hyperkinetic disorder. Scandinavian Journal of Psychology 51, 540–447. The aim of the present study was to examine gender differences in children with inattention, hyperactivity, and impulsivity on the Five to Fifteen (FTF) parent questionnaire. First, non‐referred girls (n = 43) and boys (n = 51) with problems of attention and hyperactivity‐impulsivity and then clinic‐referred girls (n = 35) and boys (n = 66) with hyperkinetic disorder (HKD) were compared on the FTF. Results suggested that non‐referred boys were more hyperactive‐impulsive than non‐referred girls, whereas clinic‐referred boys and girl with HKD were more similar than dissimilar on the FTF questionnaire. Secondly, it was examined whether the application of gender mixed norms versus gender specific norms would result in varying proportions of clinic‐referred children with HKD being identified as impaired on the subdomains of the FTF questionnaire. Based on results it was concluded that the use of a gender mixed normative sample may lead to overestimation of impairment in boys with HKD, but the type of sample applied to define impairment on the FTF should depend on the purpose for applying the questionnaire.     

Effect of low dose ionizing radiation exposure in utero on cognitive function in adolescence

Heiervang, K. S., Mednick, S., Sundet, K. & Rund, B. R. (2010). Effect of low dose ionizing radiation exposure in utero on cognitive function in adolescence. Scandinavian Journal of Psychology, 51, 210–215. Radiation from the Chernobyl nuclear power plant meltdown greatly affected several Norwegian counties. The cognitive consequences of in utero exposure to radiation from the Chernobyl accident have been intensely debated. This study examines the cognitive outcomes for those Norwegians who were exposed as fetuses to the fallout from Chernobyl. The participants, 84 adolescents who were exposed in utero to radiation from the most contaminated areas in Norway and 94 adolescents from areas not contaminated by the radiation, were tested on verbal and nonverbal IQ. Two data analyses were conducted. First, using a control‐group design, the IQ scores of exposed and unexposed adolescents were compared. Second, in a timing‐of‐exposure design, those exposed during the most sensitive period were contrasted with those exposed later in gestation. Adolescents exposed to low‐dose ionizing radiation in utero scored significantly lower in full‐scale IQ than unexposed adolescents. The difference was restricted to verbal IQ and was not evident for nonverbal IQ. The effect was not observed in exposed adolescents who had passed the most sensitive gestational period prior to the accident and thus were exposed to the radiation from Chernobyl exclusively after gestational week 16. These participants performed as well as the controls. Although the results should be interpreted cautiously due to the study’s nonrandomized design, the data add new and important support to the hypothesis that the Chernobyl accident may have had a subtle effect on the cognitive functioning of those exposed to low‐dose ionizing radiation in utero during the most sensitive gestational period.     

As pleasure unfolds. Hedonic responses to tempting food

Why do chronic dieters often violate their dieting goals? One possibility is that they experience stronger hedonic responses to tempting food than normal eaters do. We scrutinized hedonic processing in dieters and normal eaters (a) by manipulating food preexposure and (b) by assessing both immediate and delayed hedonic responses to tempting food with an adapted affect-misattribution procedure. Without food preexposure, dieters showed less positive hedonic responses than normal eaters (Study 1). When preexposed to tempting-food stimuli, however, dieters exhibited more positive delayed hedonic responses than normal eaters (Studies 1 and 2). Furthermore, delayed hedonic responding was meaningfully related to self-reported power of food and state cravings (Study 2). These findings suggest that dieters experience difficulties in down-regulating hedonic affect when in a "hot" state and that self-regulation research may benefit from a greater emphasis on temporal dynamics rather than static differences.     

Sexualität und Gewalt

Sexual assault as defined by law, psychiatry and sociological research is contrasted to the everyday definition of rape. Official figures on the frequency of sexual assaults as communicated in annual reports by the police differ greatly from figures found by research on sexual victimization or representative studies using different definitions of violence and abuse in sexual relations. Overpowering and violence is not a rare phenomenon in sexual relations – nearly every second woman and 10% of men are familiar with such situations. There are not only biological conditions (individual variance in neurophysiological parameters) but also psychological conditions favoring the use of power and threat instead of courting in sexual partnerships. External conditions are certain popular opinions in parts of society and certain subcultures which may also be more or less in favor of male superiority, thus helping the perpetrator to justify his assault or on the contrary helping the victim to find support in court procedures and therapy if necessary. Prevention therefore has two targets: a general one by changing popular opinions which are in favor of the use of power in sexual relations and informing persons in danger of becoming victims about the risks and the possibilities to protect themselves and an individual one by treating victims to overcome their psychological injuries and to treat perpetrators inside and outside the judicial system. The current discussion on increased availability of pornography in the internet shows both aspects: a general target to reduce negative influences of pornography which produces devaluating views on sexuality and women and the more individual task of tackling new forms of pathology created by the media at least for some of the consumers.     

How to Design the Infosphere: the Fourth Revolution, the Management of the Life Cycle of Information, and Information Ethics as a Macroethics

The paper reconstructs the read thread that links the information revolution, the information concept and information ethics in Floridi’s philosophy of information. In doing so, it acknowledges the grand attempt but doubts whether this attempt is up to the state of affairs concerning the actual point human history has reached. It contends that the information age is rather conceivable as a critical stage in which human evolution as a whole is at stake. The mastering of this crisis depends on an appropriate shaping of Information and Communication Technologies which requires ethical considerations. In this respect, Floridi’s notion of the fourth revolution, his assumption of the management of the life cycle of information, and his ontocentric macroethics will be discussed in the light of the term “scientific-technological revolution”, the idea of a noogenesis, a new way of thinking and new weltanschauung, the concept of friction in social and physical aspects, the concept of collective intelligence and its application to the Internet and last, but not least, the vision of a Global Sustainable Information Society.     

Sexueller Sadismus und Sexualkriminalität

The categorization of sadism has turned out to be a versatile phenomenon, which covers a spectrum from harmless symbolic rituals to extremely violent acts where strong impulses or prolonged fantasies and rituals are involved. As the phenomenon is versatile its causes and appearances vary as well, although so-called BDSM (bondage & discipline & dominance & submission & sadism & masochism) practitioners and persons with severe sadism in a forensic context share only few common preferences. Based on own clinical experiences with sadism in forensic patients the authors support the proposed revision of the Diagnostic and Statistical Manual of Mental Disorders (DSM-V) especially the diagnostic disjuncture of sadism and masochism. Sexual sadism appears more frequently in forensic contexts in combination with sadistic, antisocial and borderline personality disorders but rarely with masochism. Masochism is otherwise reported to be more prevalent in patients of general psychiatry, however, combined with depression or dependent personality traits rather than with sadism. Moreover, the authors believe that if use of the diagnostic term sadism is perpetuated the establishment of the proposed new diagnosis “paraphilic coercive disorder” is unnecessary. The diagnostic term is also important for treatment and assessment. Despite the lack of reliable long-term studies with larger samples, it is reasonable to assume that medication, sometimes even anti-androgenic treatment, can be indicated in patients with severe sadism.     

Logic-based XML data integration: a semi-materializing approach

We first describe the approach to XML data integration in the XPathLog/LoPiX project that uses a warehouse strategy. We show that the DOM model and the XML Query Data Model are not suitable for this task since the integrated database is not necessarily a tree, but a set of overlapping (original and integrated) trees. The problem is solved by using a node-labeled graph-based data model, called XTreeGraph, for the internal XML database that represents multiple, overlapping XML trees, or tree views.In the second part, we return to the standard XML data model—by still keeping the overlapping tree idea by “simulating” it: The data is internally represented by XML where the “overlayed” resulting tree is represented by XLink elements that refer to the original sources. By using a logical, transparent data model for XLinks as investigated in [May, in: 11th WWW Conference, 2002], all queries behave as stated against the XTreeGraph. The use of links for partial materialization also turns the approach from a warehouse approach into a mixed approach that combines the advantages of the warehouse approach and of the virtual approach. The approach is again illustrated by using XPathLog as data integration language.