The perception of briefly exposed point-sources of light

Point-sources of light (dots) were exposed for 10 to 50 msec, before five dark-adapted subjects in a dimly illuminated room. During voluntary fixation with one eye, the target was exposed some 10° on the nasal side of the optic axis. The intensity X duration of all targets was 2 X threshold and they consisted of either a single dot, or a pair of dots separated by a distance that was less than that required for two-point discrimination. In two-thirds of trials both the single-dot and the two-dot targets were perceived as short thin lines of various orientation. Although individual percepts were unpredictable, there was a preferred or most likely orientation for responses to the single-dot target; this was near to the horizontal for all five subjects. There was no significant difference between the preferred orientations for single-dot targets tested at sites more than 1° apart in the visual field. When two single-dot targets, separated by about 1°, were exposed simultaneously, the orientations of the perceived lines sometimes differed by as much as 80°; occasionally, one target was reported as a dot while the other was seen as a thin line. If the single-dot was briefly exposed between two continuously visible and parallel straight lines, the target usually appeared as a thin line, parallel to the framing lines. Some of these results appear to be consistent with the hypothesis that the human visual cortex, like that of the cat and monkey, contains neurones that are orientation specific.     

Accuracy of person perception: do people know what kinds of impressions they convey?

Do people know what kinds of impressions they convey to other people during particular social interactions? In a study designed to answer this question, subjects interacted individually with three partners on each of four different tasks. After each interaction, participants reported their impressions of the other person's likability and competence. They also postdicted the impressions they believed they conveyed to the other person along the same dimensions. Accuracy was computed as recommended by Cronbach (1955) and by Kenny's (1981) Social Relations Model. Subjects could tell to a significant degree how the impressions they conveyed to their partners changed over time (time accuracy) and how they changed over time in different ways with different partners (differential accuracy). They could also tell how their competence was differentially perceived by different partners (dyadic accuracy). However, they were not very accurate at discerning which partners perceived them as most competent or most likable across all interactions (person accuracy). Subjects believed that they conveyed similar impressions of themselves to all of their partners, although actually partners evidenced little agreement with each other in their impressions of a given subject. The implications of these findings for symbolic-interactionist theories of the development of the self and impression-management perspectives on social behavior are described.     

Sociodemographic Factors Associated with Types of Projects Implemented by Volunteer Lay Health Educators in Their Congregations

This study focused on the association between type of community health interventions and lay health educator variables. Lay health educators are volunteers from local faith communities who complete a healthcare training program, taught by physicians in-training. Lay health educators are instructed to implement health-related initiatives in their respective communities after graduation. Of the 72 graduates since 2011, we surveyed 55 lay health educators to gain insight into their involvement with their congregation and the type of health projects they have implemented. We dichotomized the health projects into “raising awareness” and “teaching new health skills.” Using adjusted logistic regression models, variables associated with implementing health projects aimed at teaching health skills included length of time as a member of their congregation, current employment, and age. These results may help future programs prepare lay health community educators for the type of health interventions they intend to implement in their respective communities.     

Interpretive Phenomenological Analysis of the Spiritual Characteristics of Recovery Experiences in the Context of the Brain Disease Model of Addiction

Spirituality persists as a mechanism of behavior change for addiction recovery. The aim of this project was to carefully attend to how those in recovery construct meaning of their experience of addiction, regardless of the addiction treatment modality or ideological framework. Participant accounts reflected the increased public interest in and research funding based on the brain disease model of addiction (BDMA). The qualitative study used interpretive phenomenological analysis to investigate the experiences of six adults (age range from 24 to 72) with at least three years of sustained recovery from substance use disorders. In-depth key informant interviews tracked their construction of their experiences and their understanding of addiction. Participants who entered recovery after 2010 sought to integrate BDMA-related constructs into their understanding of addiction and recovery. Addiction recovery narratives featuring BDMA-related constructs integrated neuroscience-related ideas with spirituality-related constructs rather than completely replacing the latter. Notable innovations and paradoxical tensions were found within participant accounts. Such features echo the insights on secularity of Harvard philosopher Charles Taylor, particularly his notion of the “buffered self,” which offers a theoretical framework for understanding these shifts in meaning-making. For persons entering recovery in the twenty-first century, the brain disease model of addiction carries more explanatory authority than it does for previous generations, despite the lack of agreement across addiction-related neuroscientific findings. As a model, it engenders more mechanistic, agential, brain-centered (“buffered”) senses of self, ostensibly making it less compatible with spiritual understandings of addiction than other medical models of addiction. However, this study’s findings indicate that those in recovery are likely to devise complex narratives of the etiology of addiction that combine elements from various models.     

Yoga,Mindfulness, and Meditation Interventions for Youth with ADHD: Systematic Review and Meta-Analysis

Attention-deficit/hyperactivity disorder (ADHD) is a chronic developmental disorder affecting 3–7% of children. In light of the growing utilization of yoga, mindfulness, and meditation in ADHD populations and potential benefits it has on ADHD symptoms, executive function deficits, and social functioning, we sought to evaluate these interventions for youth with ADHD. The primary aim of this review paper is to identify the efficacy of these programs for the treatment of youth with ADHD through a systematic review and meta-analysis. A systematic literature search was conducted in the following electronic databases: PsychINFO, ERIC, PubMed, and MEDLINE. Studies were included in the meta-analytic review if participants were between 5–17 years old, had a diagnosis of ADHD or met symptom threshold on psychometrically-validated measure of ADHD symptoms, was a treatment outcome study, and was published in a peer-reviewed English-language journal. The effect sizes of eleven studies demonstrate that yoga, mindfulness-based interventions, and/or meditation had a statistically significant effect on the outcomes of ADHD symptoms, hyperactivity, and inattention (parent and teacher report), as well as parent-child relationship, executive functioning, on-task behavior, parent stress, and parent trait-mindfulness (p?<?0.05). The effect sizes range from small to large effects across these outcomes. Considerable risk for bias was found across studies. Given significant methodological limitations of the literature, positive effect sizes found in studies should be interpreted with caution; these interventions should not be considered first-line interventions for ADHD. However, preliminary findings suggest yoga, mindfulness, and meditation may be beneficial for youth with ADHD, but extensive research is required to validate the efficacy of these interventions.     

Disclosure on Campus: Students’ Decisions to Tell Others About Unwanted Sexual Experiences,Intimate Partner Violence,and Stalking

The scope of student victimization occurring on college campuses is problematic, drawing the attention of researchers and campus officials. While most researchers of the disclosure of these unwanted experiences tend to examine just 1 form of victimization, a direct comparison of the disclosure of different types of campus victimization within a singular study is missing in the literature. The current study aimed to address this issue by examining 4 types of victimization experiences (unwanted sexual contact, unwanted sexual intercourse, intimate partner violence, and stalking) in a college population. A common set of possible predictors of disclosure were examined, including both demographic (e.g., gender, race, age) and situational factors (e.g., alcohol use, level of fear, relationship with perpetrator). While patterns of similarity across all victimization experiences emerged, the impact of gender, race, age, and alcohol use on disclosure decisions varied substantially by victimization type. The findings of this study address the gap in the current literature by providing a comparison and contrast of the influence of predictors across different types of victimization. Furthermore, the findings provide needed information that could help colleges and universities develop ways to encourage support-seeking and reporting among students.     

Emotion Dysregulation Mediates the Relationship Between Child Maltreatment and Non-Suicidal Self-Injury

One risk factor for non-suicidal self-injury (NSSI) in adolescents is exposure to traumatic experiences, particularly child maltreatment. However, the mechanisms through which childhood maltreatment predicts NSSI are largely unknown. Emotion dysregulation (ED) is likely an important mechanism in this relationship. Therefore, this study examined the relationship between childhood maltreatment, ED, and NSSI in a sample of adolescent inpatients (n = 53). Results demonstrated that child physical and emotional maltreatment, but not child sexual abuse, was significantly associated with NSSI frequency. More specifically, ED mediated the relationship between child physical and emotional maltreatment and NSSI frequency. Findings support the importance of ED as a mediating factor in the relationship between childhood maltreatment and NSSI behaviors and highlight the need for teaching emotion regulation skills to youth affected by trauma.     

Verbal–spatial IQ discrepancies impact brain activation associated with the resolution of cognitive conflict in children and adolescents

Verbal–spatial discrepancies are common in healthy individuals and in those with neurodevelopmental disorders associated with cognitive control deficits including: Autism Spectrum Disorder, Non‐Verbal Learning Disability, Fragile X, 22q11 deletion, and Turner Syndrome. Previous data from healthy individuals suggest that the magnitude of the difference between verbal IQ (VIQ) and performance IQ (PIQ) scores (the VIQ>PIQ discrepancy) is associated with reduced thickness in frontal and parietal cortices (inferior frontal, anterior cingulate, inferior parietal lobule, and supramarginal gyrus) that support cognitive control. Unknown is whether the VIQ>PIQ discrepancy is associated with functional deficits in these areas in healthy or ill children and adolescents. We assessed the effects of the VIQ>PIQ discrepancy on fMRI BOLD response during the resolution of cognitive conflict in 55 healthy children and adolescents during performance of a Simon Spatial Incompatibility task. As the magnitude of the VIQ>PIQ discrepancy increased, activation of fronto‐striatal, limbic, and temporal regions decreased during conflict resolution (p < .05, corrected). In exploratory analyses, the VIQ>PIQ discrepancy was associated with reduced functional connectivity from right inferior frontal gyrus to right thalamus and increased functional connectivity to right supramarginal gyrus (ps < .03, uncorrected). The VIQ>PIQ discrepancy may be an important aspect of an individual's cognitive profile and likely contributes to, or is associated with, deficient cognitive control processes characteristic of many childhood disorders.