Profiles of principal stress and coping: Concurrent and prospective correlates.

This study utilized latent profile analysis (LPA) to examine patterns of principal stress and coping and its relations with principal (n = 125), teacher (n = 3671), and student (n = 19,390) outcomes. LPA analysis of school principals based on their reports of stress and coping showed that most principals were classified as having high stress and high coping (74%) whereas 19% of principals were classified as high stress and low coping. Only a small percentage of principals (7%) were characterized by low stress and high coping.

Performance monitoring of improvisation and score-playing in a turn-taking piano duet: An EEG study using altered auditory feedback.

In music ensemble performance, perception-action coupling enables the processing of auditory feedback from oneself and other players. However, improvised actions may affect this coupling differently from predetermined actions. This study used two-person EEG to examine how pianists responded to altered pitch feedback to their own or their partner's actions while they alternated scores or improvised melodies.

Microbiota Transplantation as an Adjunct to Standard Periodontal Treatment in Periodontal Disease: A Systematic Review.

Periodontitis is a disease linked to severe dysbiosis of the subgingival microbiome. The treatment of periodontitis aims to change the dysbiosis environment to a symbiosis environment. We hypothesized that oral microbiota transplantation can lead to a significant improvement in periodontitis.

Single-item principal stress and coping measures: Concurrent and predictive validity and comparisons to teacher measures.

The present study analyzed concurrent and predictive validity of single-item scales for assessing principal stress and coping. We examined concurrent and prospective relations among stress and coping single-items with principal job satisfaction, overall health, perceptions of school safety, and principal leadership self-efficacy. We also compared principals and teachers on their stress and coping levels using the same single-item scales.

Comparing the development of cortex-wide gene expression patterns between two species in a common reference frame.

Advances in sequencing techniques have made comparative studies of gene expression a current focus for understanding evolutionary and developmental processes. However, insights into the spatial expression of genes have been limited by a lack of robust methodology. To overcome this obstacle, we developed methods and software tools for quantifying and comparing tissue-wide spatial patterns of gene expression within and between species.

Biological action at a distance: Correlated pattern formation in adjacent tessellation domains without communication.

Tessellations emerge in many natural systems, and the constituent domains often contain regular patterns, raising the intriguing possibility that pattern formation within adjacent domains might be correlated by the geometry, without the direct exchange of information between parts comprising either domain. We confirm this paradoxical effect, by simulating pattern formation via reaction-diffusion in domains whose boundary shapes tessellate, and showing that correlations between adjacent patterns are strong compared to controls that self-organize in domains with equivalent sizes but unrelated shapes. The effect holds in systems with linear and non-linear diffusive terms, and for boundary shapes derived from regular and irregular tessellations.

Individual and school predictors of teacher stress, coping, and wellness during the COVID-19 pandemic.

The Coronavirus disease 2019 (COVID-19) pandemic created unprecedented challenges for the U.S. education system and for teachers.

Exploring the link between principal leadership and family engagement across elementary and middle school.

As leaders in the school, principals play an important role in fostering family engagement. Unfortunately, little is known about specific aspects of leadership that promote family engagement. Collegial leadership, an aspect of principal leadership that promotes organizational health via trusting relationships and a sense of community, may be particularly useful to understanding how principals influence family engagement.

Modelling the emergence of whisker barrels.

Brain development relies on an interplay between genetic specification and self-organization. Striking examples of this relationship can be found in the somatosensory brainstem, thalamus, and cortex of rats and mice, where the arrangement of the facial whiskers is preserved in the arrangement of cell aggregates to form precise somatotopic maps. We show in simulation how realistic whisker maps can self-organize, by assuming that information is exchanged between adjacent cells only, under the guidance of gene expression gradients.

Limit cycle dynamics can guide the evolution of gene regulatory networks towards point attractors.

Developmental dynamics in Boolean models of gene networks self-organize, either into point attractors (stable repeating patterns of gene expression) or limit cycles (stable repeating sequences of patterns), depending on the network interactions specified by a genome of evolvable bits. Genome specifications for dynamics that can map specific gene expression patterns in early development onto specific point attractor patterns in later development are essentially impossible to discover by chance mutation alone, even for small networks. We show that selection for approximate mappings, dynamically maintained in the states comprising limit cycles, can accelerate evolution by at least an order of magnitude.

Sensitivity Analysis and Extensions of Testing the Causal Direction of Dependence: A Rejoinder to Thoemmes (2019).

A commentary by Thoemmes on Wiedermann and Sebastian's introductory article on Direction Dependence Analysis (DDA) is responded to in the interest of elaborating and extending direction dependence principles to evaluate causal effect directionality. Considering Thoemmes' observation that some DDA principles are already well-established in machine learning, we argue that several other connections between DDA and research lines in theoretical statistics, econometrics, and quantitative psychology exist, suggesting that DDA is best conceptualized as a framework that summarizes and extends existing knowledge on properties of linear models under non-normality. Further, Thoemmes articulates concerns about assumptions of error distributions used in our main article and presents an artificial data example in which some DDA tests have suboptimal statistical power.

Direction Dependence Analysis in the Presence of Confounders: Applications to Linear Mediation Models Using Observational Data.

Statistical methods to identify mis-specifications of linear regression models with respect to the direction of dependence (i.e. whether or better approximates the data-generating mechanism) have received considerable attention.

Do organizational conditions influence teacher implementation of effective classroom management practices: Findings from a randomized trial.

Although there is a growing evidence base about effective classroom management practices, teacher implementation of these practices varies due to a number of factors. A school's organizational health is one aspect of the broader social environment that has been hypothesized to influence implementation of interventions. Yet, empirical evidence is limited on whether organizational contexts can influence teacher implementation of effective interventions and subsequently, classroom environments and student outcomes.

Integrating Brain and Biomechanical Models-A New Paradigm for Understanding Neuro-muscular Control.

To date, realistic models of how the central nervous system governs behavior have been restricted in scope to the brain, brainstem or spinal column, as if these existed as disembodied organs. Further, the model is often exercised in relation to an physiological experiment with input comprising an impulse, a periodic signal or constant activation, and output as a pattern of neural activity in one or more neural populations. Any link to behavior is inferred only indirectly via these activity patterns.

Target-distractor synchrony affects performance in a novel motor task for studying action selection.

The study of action selection in humans can present challenges of task design since our actions are usually defined by many degrees of freedom and therefore occupy a large action-space. While saccadic eye-movement offers a more constrained paradigm for investigating action selection, the study of reach-and-grasp in upper limbs has often been defined by more complex scenarios, not easily interpretable in terms of such selection. Here we present a novel motor behaviour task which addresses this by limiting the action space to a single degree of freedom in which subjects have to track (using a stylus) a vertical coloured target line displayed on a tablet computer, whilst ignoring a similarly oriented distractor line in a different colour.

Indaziflam: a new cellulose-biosynthesis-inhibiting herbicide provides long-term control of invasive winter annual grasses.

Background: Indaziflam is a cellulose-biosynthesis-inhibiting (CBI) herbicide that is a unique mode of action for resistance management and has broad spectrum activity at low application rates. This research further explores indaziflam's activity on monocotyledons and dicotyledons and evaluates indaziflam's potential for restoring non-crop sites infested with invasive winter annual grasses.

Results: Treated Arabidopsis, downy brome, feral rye and kochia were all susceptible to indaziflam in a dose-dependent manner.

Procedural and interpretive skills of medical students: experiences and attitudes of fourth-year students.

Background: Recent data do not exist regarding fourth-year medical students' performance of and attitudes toward procedural and interpretive skills, and how these differ from third-year students'.

Method: Cross-sectional survey conducted in February 2006 of 122 fourth-year students from seven U.S.

Feasibility, reliability and user satisfaction with a PDA-based mini-CEX to evaluate the clinical skills of third-year medical students.

Background: The mini-clinical evaluation exercise (mini-CEX) has been used to assess clinical skills of 3rd-year medical schools. However a PDA-based mini-CEX has not been developed or evaluated before. Our objective was to determine the feasibility, implementation, and user satisfaction with a PDA-based mini-CEX.

Learning Activities and Third-Year Medical Student Ratings of High Quality Teaching Across Different Clerkships.

Objective: To identify and compare learning activities that students associate with high quality teaching across clerkships.

Methods: For six months, 110 third year medical students recorded data on learning activities and teaching quality using personal digital assistants (PDAs) during five different required clinical clerkships. Univariate and multivariate analyses were performed to assess the association between learning activities and student ratings of high teaching quality.

Procedural and interpretive skills of medical students: experiences and attitudes of third-year students.

Background: Recent data do not exist on medical students' performance of and attitudes toward procedural and interpretive skills deemed important by medical educators.

Method: A total of 171 medical students at seven medical schools were surveyed regarding frequency of performance, self-confidence, and perceived importance of 21 procedural and interpretive skills.

Results: Of the 122 responding students (71% response rate), a majority had never performed lumbar puncture, thoracentesis, paracentesis, or blood culture, and students reported lowest self-confidence in these skills.

The prophylaxis of medical patients for thromboembolism pilot study.

Purpose: We assessed the feasibility of a large randomized trial intended to determine whether low-dose heparin prophylaxis given throughout hospitalization reduces mortality and morbidity in general medical patients.

Subjects And Methods: Hospitalized general medical patients aged more than 60 years at 5 Department of Veterans Affairs (VA) medical centers were randomized to receive enoxaparin 40 mg or identical placebo, given daily by subcutaneous injection until hospital discharge. Outcomes included total mortality at 90 days (the primary outcome) and 1 year, and occurrence in the VA hospital within 90 days of symptomatic deep venous thrombosis, pulmonary embolism, and major bleeding.

Learning/feedback activities and high-quality teaching: perceptions of third-year medical students during an inpatient rotation.

Purpose: To identify specific learning activities (and teaching methods) that students associate with high-quality teaching in the inpatient setting.

Method: For ten months in 2003-04, 170 third-year medical students recorded data on learning/feedback activities and teaching quality via personal digital assistants during the inpatient portion of a required two-month medicine clerkship at four sites affiliated with the Medical College of Wisconsin. Univariate and multivariate analyses were performed to assess the association between learning/feedback activities and students' perceptions of high-quality teaching.

An Assessment of the Impact of Multimedia, Technology-Based Learning Tools on the Cardiac Auscultation Skills of Third-Year Medical Students.

Background: Previous studies have shown that medical students and post-graduate trainees need to improve their proficiency in cardiac auscultation. Technologic advances have created new learner-centered opportunities to enhance proficiency in this important physical examination skill.

Objectives: We sought to determine if technology-based, self-directed learning tools improved the cardiac auscultation skills of third-year medical students.