Ab-initio study of the structural,electronic, elastic and vibrational properties of HfX (X = Rh,Ru and Tc)

The structural, elastic, electronic and phonon properties of HfX (X = Rh, Ru and Tc) in the caesium-chloride phase have been investigated using the density functional theory within the generalized gradient approximation. The optimized lattice constant (a₀), bulk modulus (B) and the elastic constants (C_ij) are evaluated. The results are in a good agreement with the available experimental and theoretical data in the literature. Electronic band structures and densities of states have been derived for these compounds. The present band structure calculations indicate that the phases of caesium-chloride HfX (X = Rh, Ru and Tc) compounds are metals. Phonon dispersion curves and their corresponding total and projected density of states have been obtained using the direct method. The phonon spectra suggest that these compounds are dynamically stable in the caesium-chloride phase.     

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.     

Sex differences in parking are affected by biological and social factors

The stereotype of women’s limited parking skills is deeply anchored in modern culture. Although laboratory tests prove men’s average superiority in visuospatial tasks and parking requires complex, spatial skills, underlying mechanisms remain unexplored. Here, we investigated performance of beginners (nine women, eight men) and more experienced drivers (21 women, 27 men) at different parking manoeuvres. Furthermore, subjects conducted the mental rotation test and self-assessed their parking skills. We show that men park more accurately and especially faster than women. Performance is related to mental rotation skills and self-assessment in beginners, but only to self-assessment in more experienced drivers. We assume that, due to differential feedback, self-assessment incrementally replaces the controlling influence of mental rotation, as parking is trained with increasing experience. Results suggest that sex differences in spatial cognition persist in real-life situations, but that socio-psychological factors modulate the biological causes of sex differences.     

Why are there sex differences in risky driving? the relationship between sex and gender‐role on aggressive driving,traffic offences,and accident involvement among young turkish drivers

The aim of this study was to investigate how sex (male and female) and gender‐role (masculinity and femininity) and their interaction were associated with risky driving behaviors, traffic offences, and accident involvement among young Turkish drivers. Three‐hundred and fifty‐four young drivers (221 males and 133 females) filled in a form including the short form of Bem Sex‐Role Inventory (BSRI), the Driver Behaviour Questionnaire (DBQ), questions about a driver's accident history, and background information. The effects were tested on outcome variables by using hierarchical regression analysis. It was found that sex (being male) predicted only the ordinary violations. While masculinity score predicted positively the number of offences, and aggressive and ordinary (highway code) violations, femininity score predicted negatively the number of accidents and offences, aggressive and ordinary violations, and errors. The effect of interaction between masculinity and femininity was only found on the number of accidents and aggressive violations among young drivers. There was no significant interaction effect between sex and gender roles on criterion variables. Aggr. Behav. 00:1–12, 2005. © 2005 Wiley‐Liss, Inc.     

Inventing the wheel once more or learning from the history of psychotherapy research methodology: Reply to Gaudiano's comments on review

Gaudiano's criticism of one part of my review of ACT outcome research (Öst, 2008) is refuted on all issues but one. It is clear that the average amount of grant support for the ACT-studies was smaller than that of CBT-studies, even if the proportion of studies having grant support was not lower. However, that fact should only influence 25% (2 out of 8) of the methodology variables on which ACT-studies had lower mean scores than CBT-studies. It is not acceptable that a relatively new treatment, such as ACT, should be evaluated by more lenient criteria than already established therapies like CBT. If proponents of a new treatment wish to claim that their therapy is empirically supported then they have to accept to be evaluated by the APA Task Force criteria. It is time that ACT researchers start using the current psychotherapy research methodology.     

Early life origins of psychological development and mental health

According to the Developmental Origins of Health and Disease (DOHaD)‐hypothesis, conditions early in life may have life‐long consequences. In a series of epidemiological birth cohort and clinical studies and natural experiments, we have had the chance to test the extent to which this hypothesis is useful in understanding individual differences in psychological development and mental health. Our findings have provided evidence that individual differences in cognitive, social and emotional development and in mental health may lie in early life circumstances, and add significantly to the literature by pointing out which periods of early growth are the most critical. These findings are also important in translating pre‐clinical evidence to humans. What remains less clear, however, is what the mechanisms of programming are. Thus, further research is needed to elucidate these mechanisms before information on the early life origins of health and disease can be used in designing prevention and intervention programs.     

The AMQ: A Four‐Factor Inventory of Absentmindedness and Memory

The Absentmindedness and Memory Questionnaire (AMQ) is a new self‐rating scale designed to evaluate everyday memory problems related to absentmindedness. It includes 24 items and is based on studies of different samples (N= 623). Its test‐retest reliability is high and it has consistently shown similar factor structure. The AMQ thus measures four weakly correlated factors: Absentmindedness, Persons, Locations and Codes/Addresses. Factor analysis further indicates that Absentmindedness may include two subfactors: momentary attention deficit and prospective forgetfulness or impaired agenda memory. Gender differences were found in Persons (Female+) and Locations (Male+) but not in Absentmindedness or Codes/Addresses. The current version of AMQ has seven interindividually comparable response alternatives for each item in the questionnaire. This makes it useful as a measure of subjective absentmindedness or forgetfulness as well as a complementary measure of subjective memory for persons, locations, and codes/addresses/stories, especially at follow‐up examinations.     

Physiological responses in blood phobics

Eighteen patients with blood phobia were shown a film of thoracic operations containing large amounts of blood. Their heart rate (HR) and blood pressure (BP) were measured continuously before, during and after the watching of the film. The group data showed a diphasic response; an increase in HR and BP from baseline to the beginning of the film, and then a sharp drop in these parameters with the lowest values 4 min after the film was turned off. Individual data from 5 patients who fainted or were on the edge of doing so, showed massive bradycardia or drop in BP or both. In all of these patients at least one (range 1–33) 5-sec period of asystole was recorded. Possible theoretical explanations for this characteristic response pattern are discussed.     

Central response selection is present during memory scanning, but hand-specific response preparation is absent

Two experiments were performed to replicate the results of Ilan and Miller that response selection but no response-hand specific preparation is present during memory scanning. Letter-case determined which hand would respond, while memory set membership status determined whether the response was to be executed (go) or withheld (nogo). In Exp. 1, the LRP was observed as an index of response-hand specific preparation. In Exp. 2, the consistency effect derived from the response priming paradigm was observed as an index of more central response selection. The results replicate those of Ilan and Miller and suggest that central response selection is present during short-term memory scanning, but hand-specific response preparation is absent. Apparently, preliminary information is transmitted to the response selection stage during memory scanning, a finding that is inconsistent with serial stage models, but memory scanning interferes with hand-specific response preparation. Received: 30 March 1998 / Accepted: 30 November 1998