Using transcranial direct-current stimulation (tDCS) to understand cognitive processing

Noninvasive brain stimulation methods are becoming increasingly common tools in the kit of the cognitive scientist. In particular, transcranial direct-current stimulation (tDCS) is showing great promise as a tool to causally manipulate the brain and understand how information is processed. The popularity of this method of brain stimulation is based on the fact that it is safe, inexpensive, its effects are long lasting, and you can increase the likelihood that neurons will fire near one electrode and decrease the likelihood that neurons will fire near another. However, this method of manipulating the brain to draw causal inferences is not without complication. Because tDCS methods continue to be refined and are not yet standardized, there are reports in the literature that show some striking inconsistencies. Primary among the complications of the technique is that the tDCS method uses two or more electrodes to pass current and all of these electrodes will have effects on the tissue underneath them. In this tutorial, we will share what we have learned about using tDCS to manipulate how the brain perceives, attends, remembers, and responds to information from our environment. Our goal is to provide a starting point for new users of tDCS and spur discussion of the standardization of methods to enhance replicability.     

Headphone screening to facilitate web-based auditory experiments

Psychophysical experiments conducted remotely over the internet permit data collection from large numbers of participants but sacrifice control over sound presentation and therefore are not widely employed in hearing research. To help standardize online sound presentation, we introduce a brief psychophysical test for determining whether online experiment participants are wearing headphones. Listeners judge which of three pure tones is quietest, with one of the tones presented 180° out of phase across the stereo channels. This task is intended to be easy over headphones but difficult over loudspeakers due to phase-cancellation. We validated the test in the lab by testing listeners known to be wearing headphones or listening over loudspeakers. The screening test was effective and efficient, discriminating between the two modes of listening with a small number of trials. When run online, a bimodal distribution of scores was obtained, suggesting that some participants performed the task over loudspeakers despite instructions to use headphones. The ability to detect and screen out these participants mitigates concerns over sound quality for online experiments, a first step toward opening auditory perceptual research to the possibilities afforded by crowdsourcing.     

Empathy and transformative experience without the first person point of view (a reply to L. A. Paul)1

Abstract

In her very interesting ‘First-personal modes of presentation and the problem of empathy’ (2017, 315–336), L. A. Paul argues that the phenomenon of empathy gives us reason to care about the first person point of view: that as theorists we can only understand, and as humans only evince, empathy by appealing to that point of view. We are skeptics about the importance of the first person point of view, although not about empathy. The goal of this paper is to see if we can account for empathy without the ideology of the first person. We conclude that we can.     

When leaders are not who they appear: The effects of leader disclosure of a concealable stigma on follower reactions

Two studies examined follower reactions to disclosure of concealable stigma (i.e., transgender identity) by a leader. Using 109 employed participants, Study 1 showed followers rated leaders disclosing a stigma less likable and effective. This effect was both direct and indirect through relational identification with the leader. Using 206 employed participants, Study 2 found when a leader's stigma was involuntarily found out and disclosed later they received lower ratings of likability and effectiveness compared to leaders who voluntarily came out and disclosed earlier. Method (found out vs. came out) and timing of disclosure (later vs. earlier) had direct relationships with ratings of likability and effectiveness and method of disclosure had an indirect relationship with the outcomes via relational identification.     

Is There a Correlation Between Static and Dynamic Postural Balance Among Young Male and Female Dancers?

Aimed to investigate whether young male and female dancers have different patterns of association between static and dynamic postural balance (PB), 60 dancers from the Australian Ballet School (14–19 years old) were tested for static and dynamic PB with head and lumbar accelerometers. Monotonic relationships between static and dynamic PB were found in head movements among young female dancers in all three directions, but were found for young male dancers in the mediolateral (ML) and anteroposterior (AP) directions only. In lumbar movements, monotonic relationships were found for young female dancers in the AP direction only. Comparing head with lumbar movements in static PB, young male dancers demonstrated monotonic relationships between head and lumbar movements in all 3 directions; however, young female dancers demonstrated monotonic relationships in the AP direction only. In the dynamic measurements, both male and female dancers demonstrated monotonic relationships between head and lumbar movements for all parameters measured in the ML and vertical directions (p < .05). In conclusions, among female dancers static PB ability is correlated with their dynamic ability, whereas among male dancers, no relationship between the static and dynamic PB in the AP direction exists. Male dancers showed head and lumbar coordination in the static PB movement, but both genders manifested no head and lumbar coordination in the AP direction measured for dynamic PB.     

Clergy Burnout: A Comparison Study with Other Helping Professions

Clergy experience a large number of stressors in their work, including role overload and emotional labor. Although studies have found high rates of depression in clergy, the degree of work-related burnout in clergy compared to other occupations is unknown. The widely used Maslach Burnout Inventory (MBI) measures three aspects of burnout: emotional exhaustion, depersonalization, and personal accomplishment. We sought studies using comparable versions of the MBI for clergy; for social workers, counselors, and teachers because of those occupations’ emotional intensity and labor; and for police and emergency personnel because of the unpredictability and stress-related physiological arousal in those occupations. We found a total of 84 studies and compared the ranges of burnout scores between the studies of clergy, each additional occupation, and MBI published mean norms. Compared to U.S. norms, clergy exhibited moderate rates of burnout. Across the three kinds of burnout, clergy scores were relatively better than those of police and emergency personnel, similar to those of social workers and teachers, and worse than those of counselors. Clergy may benefit from burnout prevention strategies used by counselors. The moderate levels of burnout found for clergy, despite the numerous stressors associated with their occupation, suggest that clergy generally cope well and may be models to study. Overall, there is room for improvement in burnout for all professions, especially police and emergency personnel. It is important to remember the variation within any profession, including clergy, and prevent and address burnout for those in need.     

Trait mindfulness at work: A meta-analysis of the personal and professional correlates of trait mindfulness

Popular and academic press alike have concluded that mindfulness significantly benefits healthy individuals as well as those suffering from physical and psychological problems. Workplace interventions, clinical therapies, and popular self-help programs aimed at enhancing mindfulness abound, and research has demonstrated the efficacy of such mindfulness interventions in enhancing mindful states. It is of importance to note that research also suggests the average frequency with which individuals experience states of mindfulness varies from person to person, underscoring the existence of a dispositional tendency toward mindfulness—trait mindfulness. We meta-analytically cumulate the results of 270 independent studies (N = 58,592 adults from nonclinical samples) of trait mindfulness in order to explore its personal and professional correlates. Results suggest the benefits of trait mindfulness extend to both personal and professional domains. With regards to personal benefits, trait mindfulness was found to be positively correlated with confidence (ρ = .39), mental health (ρ = .38), emotional regulation (ρ = .40), and life satisfaction (ρ = .36), and negatively correlated with perceived life stress (ρ = –.43), negative emotions (ρ = –.40), anxiety (ρ = –.34), and depression (ρ = –.38). Professionally, results suggest trait mindfulness may benefit job satisfaction (ρ = .29), performance (ρ = .34), and interpersonal relations (ρ = .31), while also reducing burnout (ρ = –.48) and work withdrawal (ρ = –.17). Meta-analytic regressions also suggest trait mindfulness adds incremental predictive variance over more traditional predictors of employee burnout and work performance.     

Using Cognitive Mapping to Understand Problems Experienced by Family Caregivers of Persons with Severe Physical Disabilities

Individuals who provide ongoing care for family members who have a chronic disease or disability are likely to encounter a wide array of problems that can compromise their own health and their ability to function effectively in a caregiving role. Structured focus group meetings were conducted to elicit a comprehensive list of the problems that caregivers experienced during their first year of providing care to a person with a severe physical disability. A separate group of caregivers (N = 60) individually sorted problems into piles based on their similarity and assigned relative importance to each problem. The aggregated data were analyzed with multidimensional scaling and hierarchical cluster analysis. Results indicated that caregivers cognitively organize problems along three dimensions: I. Centeredness–caregiver versus patient-oriented; II. Relationship Demands–physical versus emotional; and III. Caregiver Burden–time versus emotional. Additionally, 6 clusters of substantively similar problems were identified and prioritized in terms of personal relevance: Basic Needs (lowest); Perceived Constraints; Caregiver Challenges; Patient Resentment; Patient Withdrawal; and Patient Intrapsychic Adjustment (highest). Further examination of the organization of problems identified by caregivers should provide important insights about the experience of caregivers and how more targeted interventions can be developed to address their specific needs.     

Gender moderates the relationship between emotion and perceived gaze

Recent evidence shows that gender modulates the morphology of facial expressions and might thus alter the meaning of those expressions. Consequently, we hypothesized that gender would moderate the relationship between facial expressions and the perception of direct gaze. In Study 1, participants viewed male and female faces exhibiting joy, anger, fear, and neutral expressions displayed with direct and averted gazes. Perceptions of direct gaze were most likely for male faces expressing anger or joy and for female faces expressing joy. Study 2 established that these results were due to facial morphology and not to gender stereotypes. Thus, the morphology of male and female faces amplifies or constrains emotional signals and accordingly alters gaze perception.