Changes in predictive motor control in drop-jumps based on uncertainties in task execution

Drop-jumps are controlled by predictive and reactive motor strategies which differ with respect to the utilization of sensory feedback. With reaction, sensory feedback is integrated while performing the task. With prediction, sensory information may be used prior to movement onset. Certainty about upcoming events is important for prediction. The present study aimed at investigating how uncertainties in the task execution affect predictive motor control in drop-jumps. Ten healthy subjects (22±1 years, M±SD) participated. The subjects performed either (i) drop-jumps by knowing that they might had to switch to a landing movement upon an auditory cue, which was sometimes elicited prior to touch-down (uncertainty). In (ii), subjects performed drop-jumps by knowing that there would be no auditory cue and consequently no switch of the movement (certainty). The m. soleus EMG prior to touch-down was higher when subjects knew there would be no auditory cue compared to when subjects performed the same task but switching from drop-jump to landing was possible (uncertainty). The EMG was reversed in the late concentric phase, meaning that it was higher in the high uncertainty task. The results of the present study showed that the muscular activity was predictively adjusted according to uncertainties in task execution. It is argued that tendomuscular stiffness was the variable responsible for the adjustment of muscular activity. The required tendomuscular stiffness was higher in drop-jumps than in landings. Consequently, when it was not certain whether to jump or to land, muscular activity and therefore tendomuscular stiffness was reduced.     

Clinical pastoral education: a physician's experience and reflection on the meaning of spiritual care in palliative care

In this article a physician reflects on her experience as a chaplain intern and how this Clinical Pastoral Education experience led to a deeper understanding of spiritual care in the palliative setting.     

Statistical and information properties of head direction cells

The human channel capacity for identifying sensory stimuli is compared with channel capacities based on neurophysiological findings. Studies have shown that cells in the postsubiculum (PoS) and the anterior dorsal thalamus (ADN) of the rat discharge as a function of the animal’s head direction in the horizontal plane. We compute the statistical properties of the firing rates of head direction (HD) cells and the potential amount of information transmitted by these cells according to two theoretical models. Thecell response model for single cells indicates that information transmitted is much less than 0.5 bits. Thepopulation response model developed for cell ensembles generates values in the range of 1–3.2 bits, suggesting that a cell population can distinguish between two and nine head directions, depending on the value used for the standard deviation of directions over which a cell fires. These values are similar to those found in human psychophysical studies of the channel capacity for unidimensional sensory attributes.     

Portable Digital Devices: Meeting Challenges to Psychotherapeutic Privacy

Portable digital devices, such as smartphones, tablets, and netbooks, now permeate our society. These devices allow substantial efficiencies in access to and communication of information by mental health professionals. They also bring with them risks to psychotherapist–client privacy. This article reviews these threats and offers suggestions as to their mitigation.     

Researching the effects of confidentiality law on patients' self-disclosures

We hypothesized that conflicting research findings on the effects that confidentiality laws have on patients' self-disclosure reflect the fact that privacy is important only to some patients in some circumstances. Instead of asking whether privacy is always important, we posed the following question: What factors determine whether privacy is important? With 42 outpatients we found that self-disclosures about sensitive issues (e.g., child abuse, drug abuse) during intake were determined partly by how legally informed patients were and partly by how relevant and consequential the law was to their cases.     

Ethical and legal risks associated with archival research

Mental health facilities and practitioners commonly permit resarchers to have direct access to patients' records for the purposes of archival research without the informed consent of patient-participants. Typically these researchers have access to all information in such records as long as they agree to maintain confidentiality and remove any identifying data from subsequent research reports. Changes in the American Psychological Association's Ethical Principles (American Psychological Association, 1992) raise ethical and legal issues that require consideration by practitioners, researchers, and facility Institutional Review Boards. This article addresses these issues and provides recommendations for changes in ethical standards as well as alternative avenues for conducting research using archival mental health records.     

Statistical and information properties of head direction cells

The human channel capacity for identifying sensory stimuli is compared with channel capacities based on neurophysiological findings. Studies have shown that cells in the postsubiculum (PoS) and the anterior dorsal thalamus (ADN) of the rat discharge as a function of the animal's head direction in the horizontal plane. We compute the statistical properties of the firing rates of head direction (HD) cells and the potential amount of information transmitted by these cells according to two theoretical models. The ceU response model for single cells indicates that information transmitted is much less than 0.5 bits. The population response model developed for cell ensembles generates values in the range of 1-3.2 bits, suggesting that a cell population can distinguish between two and nine head directions, depending on the value used for the standard deviation of directions over which a cell fires. These values are similar to those found in human psychophysical studies of the channel capacity for unidimensional sensory attributes.     

Suicidality,Self‐Harm,and Body Dissatisfaction in Transgender Adolescents and Emerging Adults with Gender Dysphoria

Prevalence of suicide attempts, self‐injurious behaviors, and associated psychosocial factors were examined in a clinical sample of transgender (TG) adolescents and emerging adults (n = 96). Twenty‐seven (30.3%) TG youth reported a history of at least one suicide attempt and 40 (41.8%) reported a history of self‐injurious behaviors. There was a higher frequency of suicide attempts in TG youth with a desire for weight change, and more female‐to‐male youth reported a history of suicide attempts and self‐harm behaviors than male‐to‐female youth. Findings indicate that this population is at a high risk for psychiatric comorbidities and life‐threatening behaviors.     

学以成人:非洲文化的贡献

引言 亚里士多德认为"人是天生的政治动物"(《政治学》第一卷第二章).人要与其同类在社会中生活.城邦是人的一种本质要求.人的目的不在于生活,而在于好好生活.但是,在社会中生活的人应该遵守社会规范.人作为理性生物,应该学会充分利用智性能力来改善生存状况并实现个人发展.关于这一点,笛卡尔说:"方法可以正确引导人的理性"(2000:12).没有方法的研究无异于勾画一种无章法的理论.     

Trauma is not the whole story: Trajectories of responses to childhood disasters intertwining with Life following the Indian Ocean tsunami

In an era of global threats, understanding the implications of disasters on young people's life course is of central importance. A particular emphasis should be placed on non-Western economically developing societies that are considered as vulnerable and are less studied, and on social groups within these societies that are underrepresented. The present study focuses on young Sri Lankan women who experienced the 2004 Indian Ocean tsunami as children. Thirteen young women generated their life stories in semi-structured interviews, 12 years after the disaster had elapsed. Holistic narrative analysis revealed new variations and in-depth meanings in disaster response trajectories and presented the intertwining courses of the responses to the Potentially Traumatic Event (PTE) with ecological aspects throughout development, as in Trajectories intertwining with Life (TiL). This study provides empirical, methodological, conceptual and practical innovations to the study of human development throughout the life course, within the interdisciplinary fields of trauma and disasters.

Highlights

• This research is interested in how childhood disaster response trajectories among an understudied population are understood through an ecological-developmental perspective.
• Life stories uncover Trajectories intertwining with Life (TiL) among Sri Lankan women who were children during the Indian Ocean tsunami.
• The TiL unique outcomes, integrating trauma responses as inseparable from ecological and developmental aspects, offer various theoretical and applied implications.