The effect of tire grip on learning driving skill and driving style: A driving simulator study

There is a need for training methods that improve the driving skill and driving style of novice drivers. Previous research in motor learning has shown that degrading the task conditions during practice can enhance long-term retention performance. Inspired by these findings, this study investigated the effects of the tire-road friction coefficient on learning a self-paced lane-keeping task in a driving simulator. A sample of 63 young and inexperienced drivers were divided into three groups, low grip (LG), normal grip (NG) and high grip (HG), who practiced driving with a friction coefficient of 0.45, 0.90, and 1.80, respectively. All groups drove six 8 min sessions on a road with curves in a rural environment: four practice sessions, an immediate retention session, and a delayed retention session on the next day. The two retention sessions were driven with normal-grip tires. The results show that LG drove with lower speed than NG during practice and retention. Transferring from the last practice session to the immediate retention session, LG’s workload decreased, as measured with a secondary task, whereas HG’s workload increased. During the immediate retention session, LG had less road departures than HG, but HG drove closer to the lane center in curves than the other two groups. HG reported elevated confidence during practice, but not in retention. In conclusion, this simulator-based study showed that practicing with low-grip tires resulted in lower driving speeds during retention tests, an effect which persisted overnight. These results have potential implications for the way drivers are trained.     

The Effect of Behavioral Family Intervention on Knowledge of Effective Parenting Strategies

There is a paucity of research considering the effect of behavioral family intervention (BFI) on parenting knowledge and the relative importance of both knowledge and parent confidence in reducing parenting dysfunction and problematic child behavior is unclear. In this study ninety-one parents (44 mothers, 47 fathers) of children aged 2–10?years completed an evidence-based BFI and were assessed at pre and post-intervention on knowledge of effective parenting strategies, parenting confidence, parent dysfunction, and reported intensity of externalised child behavior. Results showed that at pre-intervention parents higher in education (N?=?57) demonstrated greater knowledge than those lower in education (N?=?34). Relative to baseline, parents in both groups significantly improved their knowledge and confidence, reduced their dysfunction and reported less externalised child behavior. Effect sizes for the latter two variables were similar for both groups, however for parents higher in education the effect for confidence was larger than knowledge. Change in level of dysfunction explained the largest amount of unique variance in change to externalised child behavior. Results suggest that for optimal outcomes for parenting and child behavior management more knowledgeable parents may benefit from interventions that focus on practice and consolidation of already learned skills in order to increase confidence whereas for less knowledgeable parents the teaching of new skills and strategies, alongside increasing confidence, are important.     

Processing motion implied in language: eye-movement differences during aspect comprehension

Previous research on language comprehension has used the eyes as a window into processing. However, these methods are entirely reliant upon using visual or orthographic stimuli that map onto the linguistic stimuli being used. The potential danger of this method is that the pictures used may not perfectly match the internal aspects of language processing. Thus, a method was developed in which participants listened to stories while wearing a head-mounted eyetracker. Preliminary results demonstrate that this method is uniquely suited to measure responses to stimuli in the absence of visual stimulation.     

Comparing the Predictive Accuracy of Case Linkage Methods in Serious Sexual Assaults

The empirical support for linkage analysis is steadily increasing, but the question remains as to what method of linking is the most effective. We compared a more theory‐based, dimensional behavioural approach with a rather pragmatic, multivariate behavioural approach with regard to their accuracy in linking serial sexual assaults in a UK sample of serial sexual assaults (n = 90) and one‐off sexual assaults (n = 129). Their respective linkage accuracy was assessed by (1) using seven dimensions derived by non‐parametric Mokken scale analysis (MSA) as predictors in discriminant function analysis (DFA) and (2) 46 crime scene characteristics simultaneously in a naive Bayesian classifier (NBC). The dimensional scales predicted 28.9% of the series correctly, whereas the NBC correctly identified 34.5% of the series. However, a subsequent inclusion of non‐serial offences in the target group decreased the amount of correct links in the dimensional approach (MSA–DFA: 8.9%; NBC: 32.2%). Receiver operating characteristic analysis was used as a more objective comparison of the two methods under both conditions, confirming that each achieved good accuracies (AUCs = .74–.89), but the NBC performed significantly better than the dimensional approach. The consequences for the practical implementation in behavioural case linkage are discussed. Copyright © 2012 John Wiley & Sons, Ltd.     

Hierarchical Relationships in Dependency Grids: Explorations in Survivors of Childhood Sexual Abuse

A methodology for representing the patterns of dependency in a dependency grid using partial order scalogram analysis by coordinates (POSAC) is presented. The technique, devised by Shye (1985) Shye, S. 1985. Multiple scaling: The theory and application of partial order scalogram analysis, Amsterdam: North Holland.  [Google Scholar], shows these patterns as hierarchical relationships that indicate superordinate and subordinate resources. An index of depth of resource support is calculated in addition to an index of breadth of resource (which is shown to correspond to an index of dispersion of dependency). The procedure was applied to data from 54 survivors of child sexual abuse and a similar number of control subjects who all completed both an adult and child dependency grid. There was significantly less breadth of resource in the abuse group, more so for the child version than the adult, but there was significantly more depth of resource in the dependency grids from the child sexual abuse survivors.     

Child Delinquents: Examining the Market for Criminal Futures

This article investigates child delinquency (offenders younger than 13 years of age). The population of child delinquents under various dispositions in the state of Louisiana, at one point in time, is described. Eighty youth are examined using the following characteristics: Race, Gender, Age, Offense Type (violent, nonviolent) Crime Category (felony, status offense, misdemeanor, and felony or misdemeanor) and Disposition (supervision, secure custody, and non-secure custody). Child delinquency is an important topic because the younger the age of first offense the greater the probability of a delinquent and criminal career. Findings reveal very few youth in secure custody and black males account for over half of the population of child delinquents. Over 75% of the population was 12 years of age.     

Effort denial in self-deception

We propose a mixed belief model of self-deception. According to the theory, people distribute belief over two possible causal paths to an action, one where the action is freely chosen and one where it is due to factors outside of conscious control. Self-deceivers take advantage of uncertainty about the influence of each path on their behavior, and shift weight between them in a self-serving way. This allows them to change their behavior to provide positive evidence and deny doing so, enabling diagnostic inference to a desired trait. In Experiment 1, women changed their pain tolerance to provide positive evidence about the future quality of their skin, but judgments of effort claimed the opposite. This “effort denial” suggests that participants’ mental representation of their behavior was dissociated from their actual behavior, facilitating self-deception. Experiment 2 replicated the pattern in a hidden picture task where search performance was purportedly linked to self-control.