Estimating Gait Stability: Asymmetrical Loading Effects Measured Using Margin of Stability and Local Dynamic Stability

Changes to intersegmental locomotor control patterns may affect body stability. Our study aimed to (a) characterize upper body dynamic stability in response to the unilateral addition of mass to the lower extremity and (b) evaluate the efficacy of 2 different stability measures commonly used in the literature to detect resulting symmetrical step pattern modifications across the weighted segments (spatial) and between epochs of the gait cycle (temporal). Young adults walked on a treadmill while unloaded or with weights applied unilaterally to their foot, shank, or thigh. Both margin of stability and local dynamic stability (LDS) estimates detected similar trends of distal segment weighting resulting in more unstable upper body movement compared to proximal weighting; however only LDS detected anteroposterior changes in upper body stability over time.     

Is pressure stressful? The impact of pressure on the stress response and category learning

We examined the basic question of whether pressure is stressful. We proposed that when examining the role of stress or pressure in cognitive performance, it is important to consider the type of pressure, the stress response, and the aspect of cognition assessed. In Experiment 1, outcome pressure was not experienced as stressful but did lead to impaired performance on a rule-based (RB) category-learning task, but not on a more procedural information-integration (II) task. In Experiment 2, the addition of monitoring pressure resulted in a modest stress response to combined pressure and impairment on both tasks. Across experiments, higher stress appraisals were associated with decreased performance on the RB, but not on the II, task. In turn, higher stress reactivity (i.e., heart rate) was associated with enhanced performance on the II, but not on the RB, task. This work represents an initial step toward integrating the stress cognition and pressure cognition literatures and suggests that integrating these fields may require consideration of the type of pressure, the stress response, and the cognitive system mediating performance.     

Moral motivation of college students through multiple developmental structures: Evidence of intrapersonal variability in a complex dynamic system

This study is based on a broad conception of moral motivation by applying self-determination theory and dynamic systems perspectives. Accordingly, not only moral action, but also moral judgment is motivated. We carried out a detailed exploration of intrapersonal variability as a central aspect of moral motivation. Kohlberg’s six stages of moral development are reconceptualized as dynamic process structures of motivation that operate together within person simultaneously in different degrees. A total of 546 college students responded to a new instrument to assess moral motivation using a recognition task. Findings provided support for the notion that individuals use multiple motivational structures in different degrees as they make moral judgments. The majority of correlations between within-person operation degrees of motivational structures were significant. Variations in these correlations are explained to a large extent by developmental proximity of stage pairs. Results revealed both variability and developmental order in moral motivation. Implications of a dynamic developmental perspective are discussed in terms of understanding the complexity of moral motivation in ways that are sensitive to both intrapersonal and contextual variability.     

20/20: A Vision for the Future of Counseling: The New Consensus Definition of Counseling

With the promulgation of the 20/20: A Vision for the Future of Counseling consensus definition of counseling, there is finally profession‐wide clarity as to what it means to engage in professional counseling. This article describes the development and discusses the implications of the definition: “Counseling is a professional relationship that empowers diverse individuals, families, and groups to accomplish mental health, wellness, education, and career goals.” This consensus definition has been endorsed by 29 major counseling organizations.     

Emerging roles of epigenetic mechanisms in the enduring effects of early-life stress and experience on learning and memory

Epigenetic mechanisms are involved in programming gene expression throughout development. In addition, they are key contributors to the processes by which early-life experience fine-tunes the expression levels of key neuronal genes, governing learning and memory throughout life. Here we describe the long-lasting, bi-directional effects of early-life experience on learning and memory. We discuss how enriched postnatal experience enduringly augments spatial learning, and how chronic early-life stress results in persistent and progressive deficits in the structure and function of hippocampal neurons. The existing and emerging roles of epigenetic mechanisms in these fundamental neuroplasticity phenomena are illustrated.