Stefan Keller

ORCID: 0000-0003-0115-5314
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About
Contact & Profiles
Research Areas
  • Musculoskeletal pain and rehabilitation
  • Education Methods and Technologies
  • Linguistic Education and Pedagogy
  • Behavioral Health and Interventions
  • EFL/ESL Teaching and Learning
  • Health and Medical Studies
  • Fibromyalgia and Chronic Fatigue Syndrome Research
  • Health Systems, Economic Evaluations, Quality of Life
  • Sociology and Education Studies
  • Workplace Health and Well-being
  • Complementary and Alternative Medicine Studies
  • Spine and Intervertebral Disc Pathology
  • Text Readability and Simplification
  • Writing and Handwriting Education
  • Student Assessment and Feedback
  • Second Language Learning and Teaching
  • School Health and Nursing Education
  • Reflective Practices in Education
  • Linguistic research and analysis
  • Clinical practice guidelines implementation
  • Topic Modeling
  • Obesity, Physical Activity, Diet
  • Smoking Behavior and Cessation
  • Health, psychology, and well-being
  • Second Language Acquisition and Learning

Zurich University of Teacher Education
2022-2024

University of Teacher Education Zug
2024

FHNW University of Applied Sciences and Arts
2010-2023

University of Zurich
1995-2023

TuBerculosis Vaccine Initiative
2023

University of Bern
2023

University of Hildesheim
2023

University of Basel
2018-2021

Pädagogische Hochschule FHNW
2014-2021

Temple University
2020

Cost of illness study alongside a randomized controlled trial.To describe the costs care for patients with low back pain (1) and to identify patient characteristics as predictors high health cost during 1-year follow-up (2).Low (LBP) is one leading causes in industrialized countries (Life time prevalence, 70%). A lot research has been done improve primary patients' prognosis. However, does not necessarily follow changes outcomes.General practitioners (n = 126) recruited 1378 consulting LBP....

10.1097/brs.0b013e3181cd656f article EN Spine 2010-07-27

The potential application of generative artificial intelligence (AI) in schools and universities poses great challenges, especially for the assessment students' texts. Previous research has shown that people generally have difficulty distinguishing AI-generated from human-written texts; however, ability teachers to identify an text among student essays not yet been investigated. Here we show two experimental studies novice (N = 89) experienced 200) could texts generated by ChatGPT...

10.1016/j.caeai.2024.100209 article EN cc-by Computers and Education Artificial Intelligence 2024-01-25

Numerous studies have examined the relationship between lexical features of students' compositions and judgements text quality. However, degree to which teachers' are influenced by quality vocabulary in essays with regard their assessment other textual characteristics is relatively unexplored. This experimental study investigates influence on English as a second language (ESL) argumentative essays. Using analytic holistic rating scales, pre-service teachers (N = 37) Switzerland assessed four...

10.1016/j.asw.2018.12.003 article EN cc-by-nc-nd Assessing Writing 2018-12-12

In Brief Study Design. Cluster randomized controlled trial. Objective. To improve quality of care for patients with low back pain (LBP) a multifaceted general practitioner education alone and in combination motivational counseling by practice nurses has been implemented German practices. We studied effects on functional capacity (main outcome), days pain, physical activity, life, or sick leave (secondary outcomes) compared no intervention. Summary Background Data. International research lead...

10.1097/brs.0b013e3181657e0d article EN Spine 2008-03-01

Implementation of guidelines in clinical practice is difficult. In 2003, the German College General Practitioners and Family Physicians (DEGAM) released an evidence-based guideline for management low back pain (LBP) primary care. The objective this study to explore acceptance content perceived barriers implementation.Seventy-two general practitioners (GPs) participating quality circles within framework educational intervention implementation evaluated LBP-guideline its practicability with a...

10.1186/1748-5908-3-7 article EN cc-by Implementation Science 2008-02-07

Revising is central in the process of writing and for acquiring skills. Setting revision goals challenging especially novice writers: students do not revise frequently, homework conditions that demand high levels self-regulation. Empirical studies goal-setting interventions providing a detailed list show positive effects on students' revisions, researchers have argued individualizing such could increase intervention effectiveness. The present study investigated an individualized provided...

10.1016/j.learninstruc.2023.101847 article EN cc-by Learning and Instruction 2023-11-11

Epidemiologic surveys frequently show that women more often and are affected by low back pain (LBP). The aim of this secondary analysis a randomized controlled study was to explore whether presentation course LBP is different from men, if sex affects the use healthcare services for LBP.Data 1342 [778 (58%) women] patients presenting with in 116 general practices were collected. Patients completed standardized questionnaires before after consultation contacted phone 4 weeks, 6 months, 12...

10.1097/ajp.0b013e31816ed948 article EN Clinical Journal of Pain 2008-08-15

Cost-effectiveness analysis alongside a cluster randomized controlled trial.To study the cost-effectiveness of 2 low back pain guideline implementation (GI) strategies.Several evidence-based guidelines on management have been published. However, there is still no consensus effective strategy. Especially studies economic impact different strategies are lacking.This was performed trial effectiveness GI (physician education alone [GI] or physician in combination with motivational counseling...

10.1097/brs.0b013e31822b01bd article EN Spine 2011-07-27

In industrialized countries, low back pain (LBP) is one of the leading causes for prolonged sick leave, early retirement, and high health care costs. Providing same treatments to all patients neither effective nor feasible, may impede patients' recovery. Recent studies have outlined need subgroup-specific treatment allocation.This a cross-sectional study that used baseline data from consecutively recruited participating in guideline implementation trial regarding LBP primary care....

10.1097/ajp.0000000000000080 article EN Clinical Journal of Pain 2014-01-29

Abstract In this research report, we describe the design and empirical findings for a large‐scale study of essay writing ability with approximately 2,500 high school students in Germany Switzerland on basis 2 tasks associated prompts, each from standardized assessment whose scoring involved both human automated components. For aspect, methodology training monitoring raters as well collecting their ratings within customized platform. training, evaluating, selecting appropriate models...

10.1002/ets2.12249 article EN ETS Research Report Series 2019-03-18

English writing is a key competence for higher education success. However, research on the assessment of skills in as foreign language European upper secondary (i.e. beyond year 9) remains scarce. The Common Framework Reference (CEFR) describes proficiency scale six ascending levels (A1-C2). For at end Europe, common standard vantage level B2. In this study, experts from Germany and Switzerland linked students' profiles elicited constructed response test (integrated independent essays TOEFL...

10.1016/j.asw.2019.100420 article EN cc-by-nc-nd Assessing Writing 2019-11-03

Aims: To investigate the correspondence between readiness for behaviour change in general and alcohol related help-seeking particular. A aim was to examine how, if at all, measures of dependence severity, use, consequences were a composite measure depicting agreements disagreements readiness. Methods: Non-treatment seeking alcohol-dependent patients, numbering 549, from hospitals Germany interviewed. Results: When taking into account both dimensions motivation, findings indicate 42% subjects...

10.1093/alcalc/agh195 article EN Alcohol and Alcoholism 2005-09-26

Background and purpose. Stress has been recognized as a public health problem. However, little research done on gender differences in sources of stress coping strategies Hawaii. In this study, we hypothesized that: 1) women will report higher levels than men; 2) being stressed by family related stressors while men to finances work-related issues; 3) using adaptive more frequently maladaptive avoidance frequently; 4) there be no the readiness use management strategies. Method. A statewide...

10.32398/cjhp.v5i2.1235 article EN cc-by Californian Journal of Health Promotion 2007-06-01

AbstractAbstractAffective disorders in schoolteachers are a frequent reason for absenteeism and early retirement. The objective of this study was to clarify the relationship between effort-reward imbalance at work, overcommitment, affective disorders. In addition, we examined differential impact different types reward (salary, job security/promotion, esteem). matched case-control 244 teachers, 122 teachers inpatient treatment were compared healthy controls. Logistic regression analyses...

10.1179/oeh.2009.15.4.374 article EN International Journal of Occupational and Environmental Health 2009-10-01

Guidelines portray low back pain (LBP) as a benign self-limiting disease which should be managed mainly by primary care physicians. For the German health system we analyze factors are associated with receiving specialist and how this affects treatment. This is longitudinal prospective cohort study. General practitioners recruited consecutive adult patients presenting LBP. Data on physical function, depression, utilization of services were collected at first consultation follow-up telephone...

10.1016/j.ejpain.2007.06.004 article EN European Journal of Pain 2007-07-31
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