What does distractibility in ADHD reveal about mechanisms for top-down attentional control?

In this study, we attempted to clarify whether distractibility in ADHD might arise from increased sensory-driven interference or from inefficient top-down control. We employed an attentional filtering paradigm in which discrimination difficulty and distractor salience (amount of image “graying”) were parametrically manipulated. Increased discrimination difficulty should add to the load of top-down processes, whereas increased distractor salience should produce stronger sensory interference. We found an unexpected interaction of discrimination difficulty and distractor salience. For difficult discriminations, ADHD children filtered distractors as efficiently as healthy children and adults; as expected, all three groups were slower to respond with high vs. low salience distractors. In contrast, for easy discriminations, robust between-group differences emerged: ADHD children were much slower and made more errors than either healthy children or adults. For easy discriminations, healthy children and adults filtered out high salience distractors as easily as low salience distractors, but ADHD children were slower to respond on trials with low salience distractors than they did on trials with high salience distractors. These initial results from a small sample of ADHD children have implications for models of attentional control, and ways in which it can malfunction. The fact that ADHD children exhibited efficient attentional filtering when task demands were high, but showed deficient and atypical distractor filtering under low task demands suggests that attention deficits in ADHD may stem from a failure to efficiently engage top-down control rather than an inability to implement filtering in sensory processing regions.     

Diagnostic efficiency among psychiatric outpatients of a self-report version of a subset of screen items of the Structured Clinical Interview for DSM-IV-TR Personality Disorders (SCID-II)

This article describes the identification of a 10-item set of the Structured Clinical Interview for DSM-IV Personality Disorders (SCID-II) items, which proved to be effective as a self-report assessment instrument in screening personality disorders. The item selection was based on the retrospective analyses of 495 SCID-II interviews. The psychometric properties were studied in a prospective validation study in a random sample of Dutch adult psychiatric outpatients, using the SCID-II interview as the gold standard. First, all patients completed the short questionnaire. One week later, they were interviewed with the full SCID-II. After another week, the short questionnaire was readministered. According to the scores obtained with the full SCID-II, 97 patients (50%) had a personality disorder. The set of 10 SCID-II items correctly classified 78% of all participants. The sensitivity, specificity, and positive and negative power were 0.78, 0.78, 0.78, and 0.78, respectively. The results based on the retrospectively obtained data were rather similar to those obtained in the prospective validation study. Therefore, it is concluded that the set of 10 SCID-II items can be useful as a quick self-report personality disorder screen in a population of psychiatric outpatients.     

Comment les parents,les enseignants et les cliniciens évaluent les troubles du comportement externalisé du jeune enfant ? Étude de la variabilité des jugements évaluatifs et de son impact sur le développement de l’enfant

Present study aims at refining assessment of preschoolers’ behavior. Data was provided with questionnaires and observation on 118 preschoolers when recruited and 12 months later by their parents, their teachers and clinicians. The results confirmed high variations in informants’ ratings as well as negative effects of such variations regarding later child's development. The results imply the need for a multi-informant and multi-method assessment of preschoolers’ disruptive behavior. The implications of our findings for clinical purpose are discussed.     

Shifting spatial attention makes you flip: Exogenous visual attention triggers perceptual alternations during binocular rivalry

Although it has been argued that visual attention and the dynamics of binocular rivalry are closely linked, strong evidence for this proposition is still lacking. Here, we investigate how perceptual alternations during binocular rivalry are affected by spatial attention by employing a cuing paradigm. We show a tight link between the occurrence of perceptual alternations and the spatiotemporal properties of visual attention: Alternations occurred earlier and more frequently at locations where visual attention was summoned by an exogenous cue. We argue that cuing a location where rival images are presented leads to a transient increase in the effective contrast of these rival images. This transient increase in effective contrast increases the probability of an alternation at that location. Furthermore, we suggest that an occipito-fronto-parietal network known to be involved in selective attention and binocular rivalry mediates perceptual alternations by boosting the neural response at attended locations.     

Word cues affect detection but not localization responses

Many theories assume that preknowledge of an upcoming target helps visual selection. In those theories, a top-down set can alter the salience of the target, such that attention can be deployed to the target more efficiently and responses are faster. Evidence for this account stems from visual search studies in which the identity of the upcoming target is cued in advance. In five experiments, we show that top-down knowledge affects the speed with which a singleton target can be detected but not the speed with which it can be localized. Furthermore, we show that these results are independent of the mode of responding (manual or saccadic) and are not due to a ceiling effect. Our results suggest that in singleton search, top-down information does not affect visual selection but most likely does affect response selection. We argue that such an effect is found only when information from different dimensions needs to be integrated to generate a response and that this is the case in singleton detection tasks but not in other singleton search tasks.     

Creating a Mentally Healthy Community Through the Use of Behavioral Health Indicators

Recent decades have seen the development of robust systems of community health indicators, but those indicator sets tend to have few indicators related to behavioral health. Gauging community behavioral health can be complex, but given the interconnectedness of health and behavioral health and the high social and financial cost of unaddressed behavioral health needs, it is essential to develop meaningful indicators. A community-based participatory research project in Austin, Texas developed behavioral health indicators based on a review of social indicators movements across the globe, existing sets of proposed key indicators of mental health and mental illness, and ongoing community initiatives in Austin relevant to behavioral health. The community behavioral health indicators have been refined through the challenging process of implementing them in the face of competing efforts and imprecise communication about their use. While indicators should always be adapted to suit local conditions, this indicator set should provide a good starting point for researchers and communities to assess and improve the behavioral health of their community.     

Authoritarianism and Social Dominance Orientation: Relationships With Various Forms of Racism

Previous research revealed that right-wing authoritarianism (RWA) and social dominance orientation (SDO) are strongly related to racism. However, this line of inquiry neglected to study these relationships for various forms of racism. In Study 1, it was found in a Flemish heterogeneous adult sample ( N = 146) that RWA and SDO bore about equally strong relationships with biological racism, symbolic racism, ethnocentrism, and aversive racism. Study 2 revealed in a heterogeneous adult sample ( N = 176), also administered in Flanders (Belgium), that RWA was positively related to both subtle and blatant prejudice, whereas SDO was positively related only to blatant prejudice. Moreover, RWA differentiates better between different types of racists composed on the basis of scores on the racism dimensions. The implications of these results for RWA- and SDO-based prejudice are discussed.     

Do-no-harm in coalition formation: Why losses inhibit exclusion and promote fairness cognitions

Previous research on coalition formation has established that people will not hesitate to exclude others in order to maximize their payoff. The authors propose that this view is too narrow and that the decision to exclude depends on the valence of the payoff. Consistent with a “do-no-harm” hypothesis, Experiment 1 showed that participants were more reluctant to exclude in order to minimize their losses than to maximize their gains. Experiment 2 replicated this effect and showed that participants were most affected by payoff valence when they were disposed to consider the viewpoint of others. Additional analyses revealed that participants were more motivated by fairness (Experiment 1) and that fairness was more cognitively accessible (Experiment 2) when payoffs were negative rather than positive.