HOMEOSTASIS AND COMPLEXITY AS INTEGRATING TOOLS IN GERONTOLOGICAL EDUCATION

Gerontological education is an interdisciplinary process that involves integrating biological, psychological, and sociological issues of aging. In this context, the Ph.D. program in Gerontology at the University of Kentucky has used the following two phenomena as integrating tools in its first year introductory courses: (1) homeostasis, defined as the maintenance of stability, and (2) complexity, a multi-faceted model of system evolution. This paper describes the development of these concepts, gives examples of their use, and summarizes student evaluations concerning the helpfulness of homeostasis and complexity in understanding biomedical and psychosocial issues of gerontology. Formal student evaluation consisted of an objective questionnaire administered at the end of the first year and a subjective written evaluation obtained upon completion of qualifying examinations at the end of the third year. On a scale of 1-10, results of the questionnaire at the end of the first year showed homeostasis to be significantly more helpful in understanding biomedical than psychosocial issues in gerontology (average rating 8.4 versus 5.2, p < 0.05). We attributed the difference to a more implicit than explicit use of homeostasis in the social sciences. Complexity was moderately helpful in understanding both biomedical (7.0) and psychosocial (7.3) issues, but more helpful in understanding their interactions (7.9), albeit differences between these means were not significant. The subjective evaluation by third-year students indicated that homeostasis and complexity were helpful in their gerontological education, and complexity, in particular, played a role in developing their research projects. In summary, results of this study indicate that homeostasis and complexity can be useful integrating tools in gerontological education with the stipulation that care must be taken with homeostasis to point out its applicability to psychosocial issues of aging.     

Context and agency: complementarity and interactivity

In the article ‘Factors predicting online university students’ use of a mobile learning management system (m-LMS)’, Joo, Kim and Kim (Educ Technol Res Dev 64:611–30, 2016) explain actual usage of a mobile learning management system by looking at continuance intention, satisfaction, perceived usefulness, perceived ease of use and expectation confirmation. Perceived usefulness seems to play a pivotal role. In this reaction, it is argued that their study can be approached from to complementary and interacting perspectives: context and agency.

     

Effects of cooperation on spelling achievement at three age levels (Grades 2, 4, and 6)

In a field experiment among second, fourth and sixth grade pupils from 27 primary schools, two instruction methods were compared. At 13 schools (control condition) pupils did spelling exercises as usual, i.e. individually. At 14 schools pupils worked in pairs; each pupil was asked to check a partners’ work and discuss mistakes. At grade 2 cooperation led to less off-task behaviour when pupils did spelling assignments of a more complex type. Nevertheless we found a negative effect on achievement. At grade 4 cooperation led to less off-task behaviour for complex assignments and an increase in pupil’s effort as rated by their teachers as well. These findings were accompanied by a weak effect on achievement. Cooperation did not affect effort nor achievement of pupils from grade 6. At none of three grade levels we found indications of better reasoning strategies as a consequence of pair learning. The differential effect of cooperation at the three age levels may be explained in terms of complexity of learning subject and of lesson type.     

Research into the construction of mathematical texts

Investigations of the actual reading process and of the structure of a mathematical text are important for elaborating didactical methods for teaching reading a mathematical text. The article reports on a broader project concerning the structure of a mathematical text. The structure of several hundred texts has been analyzed. Academic textbooks and mathematical monographs (especially in Polish) written by mathematicians have been used as a source. Characteristic features of proof construction, that may influence the course of the reading process, have been isolated. For instance, transmission means have been investigated such as text segmentation which uses delimiters and so called procedure schemes.     

Professional knowledge affects action-related skills: The development of preservice physics teachers' explaining skills during a field experience

Professional knowledge is an important source of science teachers' actions in the classroom (e.g., personal professional content knowledge [pedagogical content knowledge, PCK] is the source of enacted PCK in the refined consensus model [RCM] for PCK). However, the evidence for this claim is ambiguous at best. This study applied a cross-lagged panel design to examine the relationship between professional knowledge and actions in one particular instructional situation: explaining physics. Pre- and post a field experience (one semester), 47 preservice physics teachers from four different universities were tested for their content knowledge (CK), PCK, pedagogical knowledge (PK), and action-related skills in explaining physics. The study showed that joint professional knowledge (the weighted sum of CK, PCK, and PK scores) at the beginning of the field experience impacted the development of explaining skills during the field experience (β = .38**). We interpret this as a particular relationship between professional knowledge and science teachers' action-related skills (enacted PCK): professional knowledge is necessary for the development of explaining skills. That is evidence that personal PCK affects enacted PCK. In addition, field experiences are often supposed to bridge the theory-practice gap by transforming professional knowledge into instructional practice. Our results suggest that for field experiences to be effective, preservice teachers should start with profound professional knowledge.     

Neuropsychological intervention in kindergarten children with subtyped risks of reading retardation

Kindergarten children at risk of developing language problems were administered the Florida Kindergarten Screening Battery. A principal components analysis revealed a verbal and a visual-spatial component and subsequent discriminant function analyses a high verbal/low visual-spatial group (LAL: Latent L) and a high visual-spatial/low verbal group (LAP: Latent P). LAL- and LAP-children were considered at risk for developing an L- or P-type of dyslexia, respectively. As is common practice with children suffering from manifest L- or P- dyslexia, the LAL- and LAP-kindergartners received right and left hemisphere stimulation, respectively. The outcomes were compared with those of bilateral hemispheric stimulation and no intervention. Reading tests were administered in primary school Grades 1 and 5/6; teachers’ evaluation of reading took place in Grade 5/6. Overall, the LAL- and LAP- groups showed significant backwardness in word and text reading, both at early and late primary school. Types of intervention made a difference though: not significantly backward in early word, late word, and late text reading were the LAL-children who had received right hemisphere stimulation. Nonintervened LAP-children did not show significant backwardness in early word reading and late text reading, nor did LAP-children who had received left hemisphere or bilateral stimulation. Early text reading was not affected by any treatment. Teacher’s evaluations were in support of these findings.     

Development of Scientific Thinking Facilitated by Reflective Self‐Assessment in a Communication‐Intensive Food Science and Human Nutrition Course

A one‐credit seminar on controversies in food science and human nutrition was a platform to introduce students to learning frameworks for thinking‐like‐a‐scientist. We hypothesized that explicitly engaging students in thinking about their thinking abilities within these frameworks would enhance their self‐perception of scientific thinking, an important general ability for food scientists. Our objectives were to assess thinking‐like‐a‐scientist using a student self‐assessment survey, and analyze their self‐reflections for evidence of such thinking. For students enrolled in one of the offerings of this course among 5 semesters from 2012 to 2014, differences in scores on a survey instrument for thinking‐like‐a‐scientist from the beginning to the end of the course showed gains in self‐assessed abilities (N = 21 to 22 students/semester). In each of the first 2 semesters in which we introduced thinking‐like‐a‐scientist frameworks, students thought they were better at defining problems scientifically by 13% to 14%. In the 3rd course offering, students’ self‐assessment of their abilities to seek evidence improved by 10%. In the 4th and 5th semester course offerings, students’ self‐assessed abilities to develop plans based on evidence improved by 7% to 14%. At the end of each semester, students’ self‐reflections on scientific thinking (N = 20 to 24/semester) included specific reference to asking questions (45% to 65% of reflections) and making plans based on evidence (26% to 50% of reflections). These data support the usefulness of self‐reflection tools as well as specific learning frameworks to help students to think about and practice thinking‐like‐a‐scientist.     

Evaluation and management of leukolysis-mediated pseudohyperkalemia in paediatric leukemic samples

IntroductionLeukolysis-related pseudohyperkalemia due to preanalytical procedures may lead to erroneous (or absence of) treatment based on an invalid lab test result. We aimed to obtain a leukocyte threshold above which leukolysis-related pseudohyperkalemia becomes clinical relevant. Secondly, temporal dynamics of treatment-induced leukocyte decrease were studied to allow tailored implementation of laboratory information system (LIS) decision rules based on the leukocyte threshold to avoid leukolysis-related pseudohyperkalemia.Materials and methodsPotassium results of AU5811 routine chemistry (Beckman Coulter, Brea, California, USA) and iStat point of care (POC) (Abbott Diagnostics, Chicago, Illinois, USA) analysers were compared, the latter method being insensitive to leukolysis caused by pre-analytical procedures. Potassium results were combined with leukocyte counts obtained using a Cell-Dyn Sapphire haematology analyser (Abbott Diagnostics, Santa Clara, California, USA), resulting in 132 unique data triplets. Regression analysis was performed to establish a leukocyte threshold. The Reference Change Value (√2 x Z x √(CV_a² + CV_i²)) was used to calculate maximum allowable difference between routine analyser and POC potassium results (delta_max + 0.58 mmol/L). Temporal analysis on the treatment-induced leukocyte decrease was performed by plotting leukocyte counts in time for all patients above the threshold leukocyte count (N = 41).ResultsEstablished leukocyte threshold was 63 x10⁹/L. Temporal analysis showed leukocyte counts below the threshold within 8 days of treatment for all patients.ConclusionsBased on performed analyses we were able to implement LIS decision rules to reduce pseudohyperkalemia due to preanalytical procedures. This implementation can contribute to a reduction in erroneous (or absence of) treatments in the clinic.     

International e-benchmarking: flexible peer development of authentic learning principles in higher education

More and more, social technologies and virtual work methods are facilitating new ways of crossing boundaries in professional development and international collaborations. This paper examines the peer development of higher education teachers through the experiences of the IVBM project (International Virtual Benchmarking, 2009–2010). The e-benchmarking process in which teachers applied authentic learning criteria is described, as are the e-tools (Ning, ACP) and the methods employed collaboratively to develop e-learning competence. Cases came from Finland, Korea, Canada, Belgium and Great Britain. The project formed an international virtual learning community for teachers. In peer development, elements of authentic learning were assigned meaning, development alternatives were considered and the interpretation of authentic learning in different situations and cultures was made concrete. The results promote and inform the planning of e-benchmarking communities and flexible virtual teamwork in professional development and education contexts.