Integration of visual information for saccade production

To foveate a visual target, subjects usually execute a primary hypometric saccade (S1) bringing the target in perifoveal vision, followed by a corrective saccade (S2) or by more than one S2. It is still debated to what extent these S2 are pre-programmed or dependent only on post-saccadic retinal error. To answer this question, we used a visually-triggered saccade task in which target position and target visibility were manipulated. In one-third of the trials, the target was slightly displaced at S1 onset (so-called double step paradigm) and was maintained until the end of S1, until the start of the first S2 or until the end of the trial. Experiments took place in two visual environments: in the dark and in a dimly lit room with a visible random square background. The results showed that S2 were less accurate for shortest target durations. The duration of post-saccadic visual integration thus appears as the main factor responsible for corrective saccade accuracy. We also found that the visual context modulates primary saccade accuracy, especially for the most hypometric subjects. These findings suggest that the saccadic system is sensitive to the visual properties of the environment and uses different strategies to maintain final gaze accuracy.     

Medically Defining,Screening, and Treating Conduct Disorder: A French Controversy

For several decades, the use of psychotropic medication has either been regarded as a medical issue or an example of the medicalization of social problems. As the publication in 2005 of a knowledge synthesis on conduct disorder in children and adolescents and the reply of the «Pas de zéro de conduite» collaboration (literally: No F for Conduct) was a highly important event in the French mental health scene, it deserves a thorough discussion. In the hope of improving the practices and policies targeting children and their families, it is essential to gain a better understanding of the bones of contention between the proponents and opponents of a medical or rather biosocial model. To achieve this, we first analyze how this model assigns a central role to certain disorders defined and diagnosed based on constellations of symptoms. We then identify five dimensions which seem to hold center stage in the controversy: genetic susceptibility, neurocognitive deficits and temperament, the familial and social environment seen as a reservoir of stressors, large-scale screening for disorders using simple instruments and multi-modal treatments, including psychotropic medication. We take an interest in the French debate as this allows us to stand back from the models prevailing in North America. It also underscores the importance of multidisciplinary thinking and social sciences when elaborating clinical or political mental health guidelines.     

Decay uncovered in nonverbal short-term memory

Decay theory posits that memory traces gradually fade away over the passage of time unless they are actively rehearsed. Much recent work exploring verbal short-term memory has challenged this theory, but there does appear to be evidence for trace decay in nonverbal auditory short-term memory. Numerous discrimination studies have reported a performance decline as the interval separating two tones is increased, consistent with a decay process. However, most of this tone comparison research can be explained in other ways, without reference to decay, and these alternative accounts were tested in the present study. In Experiment 1, signals were employed toward the end of extended retention intervals to ensure that listeners were alert to the presence and frequency content of the memoranda. In Experiment 2, a mask stimulus was employed in an attempt to distinguish between a highly detailed sensory trace and a longer-lasting short-term memory, and the distinctiveness of the stimuli was varied. Despite these precautions, slow-acting trace decay was observed. It therefore appears that the mere passage of time can lead to forgetting in some forms of short-term memory.     

Individual Differences in Individualism and Collectivism Predict Ratings of Virtual Cities’ Liveability and Environmental Quality

The present research investigated individual differences in individualism and collectivism as predictors of people's reactions to cities. Psychology undergraduate students (N = 148) took virtual guided tours around historical cities. They then evaluated the cities’ liveability and environmental quality and completed measures of individualism and collectivism. Mediation analyses showed that people who scored high in self-responsibility (individualism) rated the cities as more liveable because they perceived them to be richer and better resourced. In contrast, people who scored high in collectivism rated the cities as having a better environmental quality because they perceived them to (1) provide a greater potential for community and social life and (2) allow people to express themselves. These results indicate that people's evaluations of virtual cities are based on the degree to which certain aspects of the cities are perceived to be consistent with individualist and collectivist values.     

Changes in Neuroticism Following Trauma Exposure

Using longitudinal data, the present study examined change in midlife neuroticism following trauma exposure. Our primary analyses included 670 participants (M_age = 60.55; 65.22% male, 99.70% Caucasian) who completed the NEO Personality Inventory at ages 42 and 50 and reported their lifetime exposure to traumatic events approximately 10 years later. No differences in pre‐ and post‐trauma neuroticism scores were found among individuals who experienced all of their lifetime traumas in the interval between the personality assessments. Results were instead consistent with normative age‐related declines in neuroticism throughout adulthood. Furthermore, longitudinal changes in neuroticism scores did not differ between individuals with and without histories of midlife trauma exposure. Examination of change in neuroticism following life‐threatening traumas yielded a comparable pattern of results. Analysis of facet‐level scores largely replicated findings from the domain scores. Overall, our findings suggest that neuroticism does not reliably change following exposure to traumatic events in middle adulthood. Supplemental analyses indicated that individuals exposed to life‐threatening traumas in childhood or adolescence reported higher midlife neuroticism than individuals who experienced severe traumas in adulthood. Life‐threatening traumatic events encountered early in life may have a more pronounced impact on adulthood personality than recent traumatic events.     

Positive and extensive intergroup contact in the past buffers against the disproportionate impact of negative contact in the present

Negative (vs positive) intergroup contact may have a disproportionately large impact on intergroup relations because of valence‐salience effects, whereby negative contact causes higher category salience (Paolini, Harwood, & Rubin, 2010). One correlational and three experimental studies in three conflict areas (Northern Ireland, Arizona's border area, and Cyprus; Ns = 405, 83, 76, and 91) tested the moderation of these valence‐salience effects by individuals' histories of outgroup contact. Consistent with a perceived fit principle valence‐salience effects of face‐to‐face, television‐mediated, and imagined contact held among individuals with negative or limited histories of outgroup contact; these effects were significantly reduced or nonsignificant among individuals with positive or extensive past outgroup contact. These moderation effects suggest that positive and diverse intergroup contact in the past buffers against the harmful effects of negative contact experiences in the present, thus limiting the potential for negative spiralling of intergroup relations. Copyright © 2014 John Wiley & Sons, Ltd.     

The Goal Circuit Model: A Hierarchical Multi‐Route Model of the Acquisition and Control of Routine Sequential Action in Humans

Human control of action in routine situations involves a flexible interplay between (a) task‐dependent serial ordering constraints; (b) top‐down, or intentional, control processes; and (c) bottom‐up, or environmentally triggered, affordances. In addition, the interaction between these influences is modulated by learning mechanisms that, over time, appear to reduce the need for top‐down control processes while still allowing those processes to intervene at any point if necessary or if desired. We present a model of the acquisition and control of goal‐directed action that goes beyond existing models by operationalizing an interface between two putative systems—a routine and a non‐routine system—thereby demonstrating how explicitly represented goals can interact with the emergent task representations that develop through learning in the routine system. The gradual emergence of task representations offers an explanation for the transfer of control with experience from the non‐routine goal‐based system to the routine system. At the same time it allows action selection to be sensitive both to environmental triggers and to biasing from multiple levels within the goal system.     

Personal and communal resilience in communities exposed to missile attacks: Does intensity of exposure matter?

Based on the salutogenic model, this study aimed to examine the role of personal and communal resiliency in reducing individuals’ psychological distress when facing intensive missile attacks. We examined the relationships between these resources and psychological distress in communities which were exposed to different intensities of attacks. Data was gathered via anonymous self-report questionnaires from 843 adults during the period from one week to one month after intensive attacks in southern Israel. Questionnaires included demographic data as well as sense of coherence (SOC), community resiliency and psychological distress. Differences in levels of resiliency and distress were found among the groups with different ‘exposure levels’. Moreover, only personal resilience SOC explained psychological distress in the entire population, while community resiliency had no effect. Results are discussed on the basis of the salutogenic model with implications for developments of interventions with populations who are exposed to differing intensities of missile attacks.