Knowledge Utilisation in Road Safety Policy: Barriers to the Use of Knowledge from Economic Analysis

Previous research has found that the priority given to road safety measures is not based on the results of economic analyses, in particular cost–benefit analysis. This paper tries to identify some reasons for this fact. Knowledge utilisation theory is applied as a framework for identifying barriers. A typology of barriers to the use of economic efficiency analyses in road safety policy is developed. The presence of the barriers is investigated empirically by means of interviews of 83 road safety decision-makers in various European countries. Various technical barriers, particularly a lack of knowledge of the effects of road safety measures, are found. Based on a multivariate correspondence analysis (HOMALS), respondents can be placed in two groups with respect to the barriers they regard as most important. One group regards ethical objections to cost–benefit analyses as important, the other group but regards a large group of other barriers as important.     

Interpreting Perelman’s Universal Audience: Gross versus Crosswhite

While still subject to differing interpretations Perelman’s theory of audience has potential as an evaluative tool in rhetorical criticism as demonstrated by Gross and Crosswhite. I compare their explanations of how politicians address the universal audience and the respective implications for evaluating the argumentation and then argue that although Gross provides a more immediately applicable theory, Crosswhite’s interpretation recommends itself by virtue of its wider scope in regard to deliberative rhetoric.     

Caffeine reinforces flavor preference and behavior in moderate users but not in low caffeine users

The study examined the role of caffeine consumption in caffeine reinforcement. Previous findings have shown that caffeine reinforced flavor preference in moderate caffeine consumers who are caffeine deprived. However, most of these studies have employed rating procedures only, and have not shown the effectiveness of caffeine to reinforce behaviors other than through subjective ratings. Twenty-five participants (15 low caffeine consumers, and 10 moderate caffeine consumers) were each given three exposures to a caffeinated drink, and three exposures to a non-caffeinated drink. Each drink was associated with a particular color. At each session, they were asked to rate the pleasantness of the drink, and choose from distinctively colored sweets. The results showed an increase in the rating of pleasantness for the caffeinated drink in moderate caffeine consumers, but a decrease in rated pleasantness for low caffeine consumers. The opposite effect was seen for the non-caffeinated drink. There was an increase in consumption of the number of sweets with the same color as that of the caffeine-paired drink in the moderate caffeine consumers. These findings suggest that caffeine may serve as a negative reinforcer, and that the alleviation of withdrawal symptoms may be associated with the flavor and appearance of the caffeinated drink.     

Parent and Adolescent Depressive Symptoms: The Role of Parental Attributions

This study examined whether negative parental attributions for adolescent behaviour mediate the association between parental and adolescent depressive symptoms, and whether this relationship is moderated by adolescent gender. Mothers and fathers and 124 adolescents (76 girls and 48 boys; ages 14 to 18) participated. Adolescents were primarily Caucasian, and varied in the level of depressive symptoms (with 27% of the sample meeting diagnostic criteria for a current unipolar depressive disorder). Parents and adolescents completed measures of depressive symptoms, and participated in a videotaped problem-solving discussion. After the discussion, each parent watched the videotape and, at 20 s intervals, offered attributions for their adolescent’s behaviour. Adolescent gender moderated the relation between parental attributions and adolescent depressive symptoms, with stronger associations for female adolescents. For both mothers and fathers, both parental depressive symptoms and negative attributions about the adolescent’s behaviour made unique contributions to the prediction of depressive symptoms in adolescent females. There also was evidence that negative attributions partially mediated the link between depressive symptoms in mothers and adolescent daughters. The results are interpreted as consistent with parenting as a partial mediator between parental and adolescent depressive symptoms, and suggest that adolescent girls may be particularly sensitive to parents’ negative interpretations of their behaviour.     

Left gaze bias in humans, rhesus monkeys and domestic dogs

While viewing faces, human adults often demonstrate a natural gaze bias towards the left visual field, that is, the right side of the viewee’s face is often inspected first and for longer periods. Using a preferential looking paradigm, we demonstrate that this bias is neither uniquely human nor limited to primates, and provide evidence to help elucidate its biological function within a broader social cognitive framework. We observed that 6-month-old infants showed a wider tendency for left gaze preference towards objects and faces of different species and orientation, while in adults the bias appears only towards upright human faces. Rhesus monkeys showed a left gaze bias towards upright human and monkey faces, but not towards inverted faces. Domestic dogs, however, only demonstrated a left gaze bias towards human faces, but not towards monkey or dog faces, nor to inanimate object images. Our findings suggest that face- and species-sensitive gaze asymmetry is more widespread in the animal kingdom than previously recognised, is not constrained by attentional or scanning bias, and could be shaped by experience to develop adaptive behavioural significance.     

Parent characteristics and parent-child interactions in families of nonproblem children and ADHD children with higher and lower levels of oppositional-defiant behavior

This study examined parent-child interactions and parent characteristics in families of nonproblem children and attention deficit hyperactivity disorder (ADHD) children with lower (ADHD-LOD) and higher (ADHD-HOD) levels of oppositional-defiant behavior. Families of ADHD children were recruited from a parent training program. Observed and parent-reported child behavior problems were highest in the ADHD-HOD group. Observed parent behavior revealed few differences, but daily reports indicated that parents in both ADHD groups used more negative-reactive and fewer positive parenting strategies than control parents. Maternal psychological functioning differed between the ADHD and nonproblem groups, but not between the two ADHD groups. Fathers of ADHD-HOD children reported more psychological disturbance than controls. Parenting self-esteem was lowest in the ADHD-HOD group and highest in the nonproblem group. The results support the LOD and HOD distinction, but also suggest that, although certain difficulties are more common in the families of ADHD-HOD children, families of ADHD-LOD children also differ from controls on a number of dimensions.This research was supported by grants from the Medical Research Council of Canada and the British Columbia Health Research Foundation. Appreciation is extended to Josie Geller, Kim Behrenz, Susan Greaves, and Sonia Pietzsch who assisted with data collection and coding, and to the families who generously gave their time to participate in the research. Thanks also to two anonymous reviewers for their comments.