A phenomenographic study of 10th grade students’ understanding of electrolytes

2019 ◽  
Vol 20 (1) ◽  
pp. 204-212 ◽  
Author(s):  
Shanshan Lu ◽  
Hualin Bi ◽  
Xiufeng Liu
Keyword(s):  
10Th Grade ◽  
Phenomenographic Study ◽  
Phenomenographic Method ◽  
Teaching Implications ◽  
Different Levels ◽  
Learning Chemistry

Students have various conceptions of electrolytes in learning chemistry. The aim of this study is to identify 10th grade students’ understanding of the electrolyte concept by using a phenomenographic method. Eight students, whose abilities were at different levels, were selected and interviewed. The findings show that four distinctive categories of students’ conceptions of electrolytes are demonstrated, and a hierarchy in terms of the logical progression among them can be developed. Finally, teaching implications are given.

scholarly journals Teaching Gerontology in Transcultural Academics: A Phenomenographic Study of Thai and Swedish Nurse Educators’ Conceptions of Gerontological Nursing

2022 ◽  
pp. 104365962110684
Author(s):  
Karin Mattsson ◽  
Sirpa Rosendahl
Keyword(s):  
Older Adults ◽  
Nurse Educators ◽  
Term Care ◽  
Cultural Aspects ◽  
Nursing Curricula ◽  
Gerontological Nursing ◽  
Phenomenographic Study ◽  
Phenomenographic Method ◽  
Global Aging

Introduction: There is an urgent need for registered nurses with gerontological competence within long-term care (LTC) of older adults. Despite increases of life expectancy, LTC for older adults is not emphasized in nursing curricula in neither Sweden nor Thailand. Thus, the aim was to explore conceptions on gerontological nursing (GN) among Swedish and Thai nurse educators. Method: A qualitative phenomenographic method, based on open-ended interviews with five Thai and nine Swedish nurse educators was conducted. Results: The results indicate a paradox between the educators’ knowledge about the implications of global aging, their hope of own aging, and LTC. The ethical responsibility of being credible and a source of inspiration in teaching about aging are focused, while GN seem to be less important. Discussion: To increase students’ interest in GN, measures need to be taken within the educational arenas, where the educators’ own conceptions toward GN, cultural aspects of aging, and LTC are discussed.

scholarly journals Pengembangan instrumen diagnostik three-tier untuk mengidentifikasi miskonsepsi materi fluida statis pada siswa kelas X MIA

2021 ◽  
Vol 1 (7) ◽  
Author(s):  
Anisa Matinu Saifullah ◽  
Wartono Wartono ◽  
Sugiyanto Sugiyanto
Keyword(s):  
Hydrostatic Pressure ◽  
Research And Development ◽  
Diagnostic Instrument ◽  
Average Score ◽  
10Th Grade ◽  
Static Fluid ◽  
The Subject ◽  
Different Levels ◽  
Mathematics And Science

Peneliti melakukan penelitian pengembangan dan penggunaan instrumen diagnostik three-tier dengan tujuan untuk megidentifikasi miskonsepsi yang dimiliki siswa pada materi fluida statis. Penelitian yang dilakukan merupakan penelitian pengembangan. Subjek penelitian dalam penelitian adalah siswa kelas X MIA 4 MAN 3 Malang. Instrumen yang dikembangkan adalah instrumen diagnostik three-tier berjumlah 24 butir soal dengan 4 alternatif jawaban, 4 alternatif alasan pemilihan jawaban, dan keyakinan jawaban (yakin / tidak yakin) dengan 3 rentang tingkat keyakinan. Seluruh butir soal dinyatakan layak pada ranah materi, konstruksi, bahasa, dan kemampuan identifikasi miskonsepsi menurut penilaian ahli dengan nilai rata-rata diatas 3,26. Hasil identifikasi menunjukkan bahwa siswa yang mengalami miskonsepsi dan bahkan tidak memiliki konsepsi pada materi fluida statis masih cukup besar. Beberapa jenis miskonsepsi yang ditemukan diantaranya, siswa beranggapan bahwa (1) luas bejana mempengaruhi besarnya tekanan hidrostatis, (2) gaya yang diberikan pada fluida akan diteruskan ke segala arah sama besar, (3) gaya Archimedes dipengaruhi kedalaman benda dalam fluida. The researcher do research about development and application of three-tier diagnostic instrument to identify misconceptions within static fluid material. This research is due to research and development. The subject of the research is the student of 10th grade of mathematics and science 4 MAN 3 Malang. The instrument is three-tier diagnostic instrument that consist of 24 questions with 4 alternative answers, 4 alternative reasons, and the sureness of every answer (sure/not sure) with three different levels. The material, construction, language, and misconception identificational ability on every question are valid according to experts judgement with average score over 3,26. Identification's result shows that many students still get in misconception on understanding the static fluid material, even some of them don't understand at all. Sort of misconception's types that found are student belief that (1) area of the container has an effect on hydrostatic pressure, (2) force given to the fluid will be transferred in all direction propotionally, (3) Archimedes's force is influenced by the depth of object on fluid.

scholarly journals INFORMATIONAL VALUE OF SUBMICROSCOPIC REPRESENTATIONS IN SLOVENIAN CHEMISTRY TEXTBOOK SETS

2017 ◽  
Vol 16 (5) ◽  
pp. 694-705
Author(s):  
Špela Hrast ◽  
Vesna Ferk Savec
Keyword(s):  
Primary Schools ◽  
Textbook Analysis ◽  
Chemistry Textbook ◽  
Chemistry Learning ◽  
Depth Analysis ◽  
Informational Value ◽  
Different Levels ◽  
Learning Chemistry ◽  
Grade 8

This research focuses on the informational value of submicroscopic representations (SMRs) in chemistry textbook sets for Slovenian primary schools (Grade 8 and Grade 9, students’ age 13-15 years). For the purpose of analysis a holistic criteria related to the accompanying descriptors of SMRs in textbook sets was developed. The research revealed four main holistic descriptors accompanying SMRs, i.e. direct descriptor (D), indirect descriptor (I), combined descriptor (C), and SMRs without descriptors (W), which support learners’ recognition of SMRs’ informational value on different levels by providing different accompanying add-ons of SMRs. In-depth analysis identified 14 main categories of the underlying representational types of SMR add-ons. The significance of the research is in initiating a discussion about the holistic criteria for the description of SMRs integrated in the textbook sets, because in practice the learner perceives each SMR as a whole. Keywords: chemistry learning, chemistry textbook sets, informational value, submicroscopic representations, textbook analysis.

scholarly journals A Phenomenographic Study of Adolescents’ Conceptions of Health Information Appraisal as a Critical Component of Adolescent Health Literacy

2020 ◽  
Vol 44 ◽  
pp. 62-80
Author(s):  
Inese Stars ◽  
Zanda Rubene
Keyword(s):  
Data Analysis ◽  
Health Literacy ◽  
Health Information ◽  
Social Practice ◽  
Research Approach ◽  
Critical Component ◽  
Structured Interviews ◽  
Outcome Space ◽  
Phenomenographic Study ◽  
Phenomenographic Method

This paper reports on a health literacy study that explored adolescents’ conceptualizations of health information appraisal as a social practice in Latvia. The study was guided by phenomenography, a qualitative research approach used to describe people’s conceptions of a particular phenomenon. A purposive, maximum variation sampling was used, and 24 adolescents were recruited to take part in the study, ranging from 13 to 16 year-olds. Semi-structured interviews were undertaken for data collection. A phenomenographic method for data analysis was performed using the guidelines proved by Sandberg. The data analysis presented seven categories of description and an outcome space representing the adolescents’ qualitatively different conceptions of health information appraisal. The implications for health education in school are discussed.

Dependence of Intergranular Fracture on Boundary Topography and Cohesion

1973 ◽  
Vol 31 ◽  
pp. 150-151
Author(s):  
J. E. Doherty ◽  
A. F. Giamei ◽  
B. H. Kear ◽  
C. W. Steinke
Keyword(s):  
Grain Boundary ◽  
Room Temperature ◽  
Nickel Base Superalloy ◽  
Boundary Shear ◽  
Room Temperature Ductility ◽  
Solid Solution Matrix ◽  
Nickel Base ◽  
Solution Matrix ◽  
Different Levels ◽  
Base Superalloy

Recently we have been investigating a class of nickel-base superalloys which possess substantial room temperature ductility. This improvement in ductility is directly related to improvements in grain boundary strength due to increased boundary cohesion through control of detrimental impurities and improved boundary shear strength by controlled grain boundary micros true tures.For these investigations an experimental nickel-base superalloy was doped with different levels of sulphur impurity. The micros tructure after a heat treatment of 1360°C for 2 hr, 1200°C for 16 hr consists of coherent precipitates of γ’ Ni3(Al,X) in a nickel solid solution matrix.

Immunoenzymatic demonstration of the simultaneous presence of transferrin, hemopexin and albumin in a same hepatocyte and their ultrastructural localization

1978 ◽  
Vol 36 (2) ◽  
pp. 88-89
Author(s):  
M. Kraemer ◽  
J. Foucrier ◽  
J. Vassy ◽  
M.T. Chalumeau
Keyword(s):  
Plasma Proteins ◽  
Rat Hepatocytes ◽  
Ultrastructural Localization ◽  
Carrier Proteins ◽  
Normal Cells ◽  
Adult Rat ◽  
Adult Rat Hepatocytes ◽  
Monospecific Antisera ◽  
Different Levels

Some authors using immunofluorescent techniques had already suggested that some hepatocytes are able to synthetize several plasma proteins. In vitro studies on normal cells or on cells issued of murine hepatomas raise the same conclusion. These works could be indications of an hepatocyte functionnal non-specialization, meanwhile the authors never give direct topographic proofs suitable with this hypothesis.The use of immunoenzymatic techniques after obtention of monospecific antisera had seemed to us useful to bring forward a better knowledge of this problem. We have studied three carrier proteins (transferrin = Tf, hemopexin = Hx, albumin = Alb) operating at different levels in iron metabolism by demonstrating and localizing the adult rat hepatocytes involved in their synthesis.Immunological, histological and ultrastructural methods have been described in a previous work.

Memory Processes, Aging, Cognitive Decline, and Neurodegenerative Diseases

2006 ◽  
Vol 11 (4) ◽  
pp. 304-311 ◽  
Author(s):  
Lars-Göran Nilsson
Keyword(s):  
Cognitive Impairment ◽  
Cognitive Decline ◽  
Neurodegenerative Disease ◽  
Genetic Markers ◽  
Brain Activity ◽  
Memory Performance ◽  
Modeling And Simulations ◽  
Aging And Health ◽  
Explained Variance ◽  
Different Levels

This paper presents four domains of markers that have been found to predict later cognitive impairment and neurodegenerative disease. These four domains are (1) data patterns of memory performance, (2) cardiovascular factors, (3) genetic markers, and (4) brain activity. The critical features of each domain are illustrated with data from the longitudinal Betula Study on memory, aging, and health ( Nilsson et al., 1997 ; Nilsson et al., 2004 ). Up to now, early signs regarding these domains have been examined one by one and it has been found that they are associated with later cognitive impairment and neurodegenerative disease. However, it was also found that each marker accounts for only a very small part of the total variance, implying that single markers should not be used as predictors for cognitive decline or neurodegenerative disease. It is discussed whether modeling and simulations should be used as tools to combine markers at different levels to increase the amount of explained variance.

Implications of Person Fluctuation for the Stability and Validity of Test Scores

Methodology ◽  
2006 ◽  
Vol 2 (4) ◽  
pp. 142-148 ◽  
Author(s):  
Pere J. Ferrando
Keyword(s):  
Item Response ◽  
Test Scores ◽  
Temporal Stability ◽  
Person Fit ◽  
Item Parameters ◽  
Individual Trait ◽  
The Stability ◽  
The Individual ◽  
Different Levels ◽  
Fluctuation Model

In the IRT person-fluctuation model, the individual trait levels fluctuate within a single test administration whereas the items have fixed locations. This article studies the relations between the person and item parameters of this model and two central properties of item and test scores: temporal stability and external validity. For temporal stability, formulas are derived for predicting and interpreting item response changes in a test-retest situation on the basis of the individual fluctuations. As for validity, formulas are derived for obtaining disattenuated estimates and for predicting changes in validity in groups with different levels of fluctuation. These latter formulas are related to previous research in the person-fit domain. The results obtained and the relations discussed are illustrated with an empirical example.

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