Influence of Cognitive Factors on Sexual Assault Recovery: Descriptive Review and Methodological Concerns

This article aims to verify whether the empirical data presented in the literature on sexually assaulted victims support the hypothesis advanced by various aetiological models, which is that cognitions play an important role in the development and maintenance of Post-Traumatic Stress Disorder. The first objective is to present state-of-the-art results on sexually assaulted victims' post-traumatic cognitions and their link to post-assault symptomatology. The second objective is to analyse the various methodological facets of those studies. Finally, paths for future studies are traced and recommendations are made.     

Making heads or tails of probability: An experiment with random generators

Background. The equiprobability bias is a tendency for individuals to think of probabilistic events as ‘equiprobable’ by nature, and to judge outcomes that occur with different probabilities as equally likely. The equiprobability bias has been repeatedly found to be related to formal education in statistics, and it is claimed to be based on a misunderstanding of the concept of randomness. Aims. The aim of the present study was to examine whether experimenting with random generators would decrease the equiprobability bias. Sample. The participants were 108 psychology students whose performance was measured either immediately after taking part in a training session (n= 55), or without doing any training exercises (n= 53). Method. The training session consisted of four activities. These included generating random sequences of events, and learning about the law of large numbers. Subsequently, the participants were tested on a series of equiprobability problems, and a number of other problems with similar structure and content. Results. The results indicated that the training successfully decreased the equiprobability bias. However, this effect was moderated by participants’ cognitive ability (i.e., higher ability participants benefitted from the training more than participants with lower cognitive ability). Finally, the training session had the unexpected side effect of increasing students’ susceptibility to the representativeness heuristic. Conclusions. Experimenting with random generators has a positive effect on students’ general understanding of probability, but the same time it might increase their susceptibility to certain biases (especially, to the representativeness heuristic). These findings have important implications for using training methods to improve probabilistic reasoning performance.     

On the atomic structure of an asymmetrical near Σ = 27 grain boundary in copper

The atomic structure of an asymmetrical near Σ = 27 {525} tilt grain boundary (GB) in copper is determined by coupling high-resolution transmission electron microscopy and molecular dynamics simulation. The average GB plane is parallel to {414} in crystal (1) and {343} in crystal (2). The detailed GB structure shows that it is composed of facets always parallel to {101} and {111} in crystals (1) and (2), respectively. The atomic structure of one facet is described using the structural units model. Each facet is displaced with respect to its neighbours by a pure step, giving rise to the asymmetry of the GB plane orientation. The energy of this asymmetrical GB is significantly lower than that of both the {525} symmetrical and the {11,1,11}/{111} asymmetrical Σ = 27 GBs. One GB region displays another atomic structure with a dislocation that accounts for the misfit between interatomic distances in the {414} and {343} GB planes.     

Discrete Visual Samples May Control Locomotor Equilibrium and Foot Positioning in Man

The static or dynamic visual cues required for equilibrium as well as for foot guidance in visually guided locomotion in man were studied using a variety of locomotion supports and illumination and visual conditions. Stroboscopic illumination (brief flashes) and intermittent lighting (longer flashes) were used to control and to vary the visual sampling frequency of static (positional/orientational) visual cues. There were three main findings: First, visual control of foot positioning during locomotion over discontinuous terrain depends mainly upon static visual cues with a low sampling frequency (about 3 Hz); second, visual control of dynamic equilibrium during locomotion over a narrow support depends mainly upon the availability of high frequency static visual cues (up to about 12 Hz); and third, static visual cues required for equilibrium control are extracted from both the peripheral and the central visual field.

Assuming that discrete demands for feedback occur, a simple probabilistic model was proposed, according to which the mean time that elapses following presentation of static visual cues about positions or changes of position accounts for the differences in the difficulty of the various illumination conditions.     

Active versus passive proprioceptive straight-ahead pointing in normal subjects

Eighty blindfolded healthy female subjects participated in an active and a passive straight-ahead pointing task to study the estimation of the subjective sagittal middle in the presence or absence of an active haptic exploration. Subjects were to point straight-ahead with their left or right index finger starting from different right- or left-sided locations, while performing either an active movement or with the hand being passively moved by the examiner. Results showed: (i) a significant effect of the hand used only on the active straight-ahead pointing task performance; (ii) a significant effect of the starting position both on the active and passive pointing performance; (iii) a significant correlation between the two protocols only in terms of spatial bias (algebraic error) but not in terms of precision (absolute errors). These results are discussed with regards to normal and neuropsychological studies of the egocentric frame of reference.     

An additive factor analysis of the effect of depression on the reaction time of old patients

Depressed participants display longer reaction times (RTs) than control participants. The present study was aimed at deciphering which stages of processing are affected by depression in old adults. Sixteen old depressed patients and 16 old healthy volunteers performed a two-choice visual RT task. Signal intensity, stimulus-response mapping and foreperiod duration were manipulated so as to affect the stages of stimulus preprocessing, response selection and motor adjustment, respectively. Reaction time data suggest that depression spares the stage of stimulus preprocessing but affects the stage of motor adjustment. An analysis of the error rate leaves open the possibility that depression alters the stage of response selection.     

They raised me to resist: Examining the sociopolitical pathways between parental racial socialization and Black youth's racial justice action

In a sample of 500 self-identified Black adolescents from across the United States, this study investigated the pathways between youth's experiences of parental racial socialization (RS) and their sociopolitical development. Findings from structural equation modelling reveal that RS messages and actions were positively associated with youth's awareness of racial inequality (critical reflection) and confidence and motivation in addressing racism (critical agency). Further, there were direct and indirect associations between RS and multiple forms of racial justice actions (interpersonal, political/communal, and online). Racial barriers messages were directly positively associated with political/communal and indirectly positively associated with interpersonal and online action, while cultural socialization actions were directly positively associated with all three forms of action. These findings support theoretical contentions that RS messages and actions may be powerful tools for cultivating Black youth's understanding and capacity to transform racially unjust systems. Further, parents' behaviours to racially socialize their children may be more impactful than their verbal messages in cultivating multiple forms of racial justice action. Finally, recommendations for future research and practice related to Black youth's consciousness and activism are presented. Please refer to the Supplementary Material section to find this article's Community and Social Impact Statement .     

Vocalisations et communication chez le nourrisson de 6 à 15 mois

Cette recherche s'inspire à la fois des travaux portant sur l'émergence de la communication intentionnelle et des études phonologiques des vocalisations prélangagières. Elle vise à cerner la valeur communicative des vocalisations au cours de leur développement, ainsi qu'à vérifier si le nourrisson utilise un type particulier de vocalisations (prélangagier ou non langagier) pour communiquer avec autrui. Vingt-quatre nourrissons ont été observés à 6, 9, 12, et 15 mois, dans le cadre de tâches de demande. Les résultats révèlent que le nourrisson utilise davantage son canal vocal avec l'âge, et qu'il dirige de plus en plus ses vocalisations vers autrui. Il ne semble toutefois pas employer préférentiellement un type particulier de vocalisations selon qu'il communique avec autrui ou non.