Challenges faced by pre-service chemistry teachers teaching in a laboratory and their solution proposals

This study examines the challenges faced by pre-service chemistry teachers teaching in a laboratory and their proposed solutions to these challenges. The study was conducted in a 13-week-long methodology course. Written statements from participants and observations from researchers were used as data sources. From these data, it was found that the participants faced challenges related to content knowledge and connections, laboratory and experiments, students, planning and implementing instruction and general teacher qualifications. In terms of solutions, various ideas were proposed, such as improved development of content knowledge, pre-lesson preparation and the acquisition of professional experience. The challenges expressed by participants differed from those observed by the researchers and increased during the length of the course. In addition, their proposed solutions were not sufficient, coherent or explicit.     

托普卡比宫博物馆的中国瓷器

中国元代，丝绸之路重又繁荣，海陆贸易达到兴盛。中国出口中近东的商品，以青瓷和青花瓷为大宗。这些依据伊斯兰国家的品味与习俗制成的大而昂贵的瓷器，在时为奥斯曼帝国行政中心暨皇家居所的托普卡比宫得到推崇与妥存。当时，官员去世或免职，其财产都被收归皇室，所藏之中国瓷器自充入宫库。     

Educational technology research trends in Turkey from a critical perspective: An analysis of postgraduate theses

The aim of this study is to explore the research trends in the context of postgraduate programmes in the field of Educational Technology (ET) in Turkey between 1996 and 2016, and to uncover the possible factors that influence these trends from the perspective of ET faculty members. This study was informed by critical theory and employed the critical inquiry method. In the first phase, content analysis technique was used in order to explore trends in research methods and topics in theses completed in ET postgraduate programmes in Turkey. In the second phase, in-depth interviews were conducted with 11 faculty members regarding the possible influential factors. The findings of the content analysis indicated that ET research was dominated by quantitative research designs in the examined theses. Critical methods were overlooked and social, cultural, and political issues were largely silenced. The findings of the interviews showed that the factors that have been influential on ET research trends were the social impact of the research, personal interests and skills, disciplinary and departmental culture, and feasibility concerns. This study presents implications for better ET research by addressing blind spots of the field and providing suggestions for ET postgraduate students, ET scholars, policymakers and practitioners in a global context and other developing countries since the resulting trends in Turkey were found similar to international trends in the field.     

Utilization of biological variation data in the interpretation of laboratory test results – survey about clinicians’ opinion and knowledge

IntroductionTo interpret test results correctly, understanding of the variations that affect test results is essential. The aim of this study is: 1) to evaluate the clinicians’ knowledge and opinion concerning biological variation (BV), and 2) to investigate if clinicians use BV in the interpretation of test results.Materials and methodsThis study uses a questionnaire comprising open-ended and close-ended questions. Questions were selected from the real-life numerical examples of interpretation of test results, the knowledge about main sources of variations in laboratories and the opinion of clinicians on BV. A total of 399 clinicians were interviewed, and the answers were evaluated using a scoring system ranked from A (clinician has the highest level of knowledge and the ability of using BV data) to D (clinician has no knowledge about variations in laboratory). The results were presented as number (N) and percentage (%).ResultsAltogether, 60.4% of clinicians have knowledge of pre-analytical and analytical variations; but only 3.5% of them have knowledge related to BV. The number of clinicians using BV data or reference change value (RCV) to interpret measurements results was zero, while 79.4% of clinicians accepted that the difference between two measurements results located within the reference interval may be significant.ConclusionsClinicians do not use BV data or tools derived from BV such as RCV to interpret test results. It is recommended that BV should be included in the medical school curriculum, and clinicians should be encouraged to use BV data for safe and valid interpretation of test results.     

Diagnostic accuracy of UriSed automated urine microscopic sediment analyzer and dipstick parameters in predicting urine culture test results

Introduction

Urinary tract infection (UTI) is one of the most common types of infection. Currently, diagnosis is primarily based on microbiologic culture, which is time- and labor-consuming. The aim of this study was to assess the diagnostic accuracy of urinalysis results from UriSed (77 Electronica, Budapest, Hungary), an automated microscopic image-based sediment analyzer, in predicting positive urine cultures.

Materials and methods:

We examined a total of 384 urine specimens from hospitalized patients and outpatients attending our hospital on the same day for urinalysis, dipstick tests and semi-quantitative urine culture. The urinalysis results were compared with those of conventional semi-quantitative urine culture.

Results:

Of 384 urinary specimens, 68 were positive for bacteriuria by culture, and were thus considered true positives. Comparison of these results with those obtained from the UriSed analyzer indicated that the analyzer had a specificity of 91.1%, a sensitivity of 47.0%, a positive predictive value (PPV) of 53.3% (95% confidence interval (CI) = 40.8–65.3), and a negative predictive value (NPV) of 88.8% (95% Cl = 85.0–91.8%). The accuracy was 83.3% when the urine leukocyte parameter was used, 76.8% when bacteriuria analysis of urinary sediment was used, and 85.1% when the bacteriuria and leukocyturia parameters were combined. The presence of nitrite was the best indicator of culture positivity (99.3% specificity) but had a negative likelihood ratio of 0.7, indicating that it was not a reliable clinical test.

Conclusions:

Although the specificity of the UriSed analyzer was within acceptable limits, the sensitivity value was low. Thus, UriSed urinalysis results do not accurately predict the outcome of culture.     

Turkish preservice science teachers’ efficacy beliefs regarding science teaching and their beliefs about classroom management

The purpose of this study was to explore Turkish preservice science teachers’ science teaching efficacy and classroom management beliefs. Data in this study were collected from a total number of 584 preservice science teachers utilizing the Science Teaching Efficacy Belief Instrument and the attitudes and beliefs on classroom control (ABCC) inventory. Data analysis indicated that preservice science teachers generally expressed positive efficacy beliefs regarding science teaching. In addition, results revealed that participants were interventionist on the instructional management dimension, whereas they favored non-interventionist style on the people management dimension of the ABCC inventory.     

Developing a Scale of Attitudes Toward Seeking Psychological Help: Validity and Reliability Analyses

The present study was conducted to develop the scale for Attitudes Toward Seeking Psychological Help (ASPH). Four dimensions of ASPH were determined by using factor analysis, which was conducted with 356 participants. The dimensions were named as confidence for getting psychological help; beliefs about the functions of psychological help; endurance against labelling, and self-disclosure. Reliability coefficient was found as satisfactory in the scale (.88) and subscales (.76, .77, .76, and .68). Test-retest reliability was .99. Validity of the scale was examined by using discriminant validity analysis and it was observed as sufficient. The results of the study showed that ASPH has an identifiable factor structure and it is a reliable and valid scale.     

Science teacher candidates’ perceptions about roles and nature of scientific models

Background: Scientific models have important roles in science and science education. For scientists, they provide a means for generating new knowledge or function as an accessible summary of scientific studies. In science education, on the other hand, they are accessible representations of abstract concepts, and are also organizational frameworks to teach and learn inaccessible facts. As being indispensable parts of learning and doing science, use of scientific models in science classes should be reinforced. At this point, uncovering pre-service science teachers’ (PSTs) understandings of scientific models are of great importance since they will design and conduct teaching situations for their students. Purpose: The study aimed to provide an answer to the research question: What understandings do PSTs possess about scientific models? Sample: The sample of the study consisted of 14 PSTs enrolled in an Elementary Science Education program in a public university in Ankara, Turkey. Design and methods: Data were collected by using an open-item instrument and semi-structured interviews, and were analyzed by using qualitative data analysis methods. Results: Findings showed that PSTs held fragmented views of models by having informed views in some aspects while having naïve views on others. That is, although they displayed a constructivist orientation by acknowledging the presence of multiple models for the same phenomenon depending on scientists’ perspectives or creativity involved in the production of scientific knowledge, PSTs also expressed logical positivist views by believing that models should be close to the real phenomena that they represent. Findings further revealed that PSTs generally conceptualized models’ materialistic uses, yet they did not think much about their theoretical and conceptual uses. It was observed that roles like reifying and visualizing were overestimated and models were dominantly characterized as three-dimensional representations. Conclusions: It is clear that PSTs, having difficulties in grasping the concept of models, would possibly have problems in planning their lessons effectively and would not develop accurate concepts in their students. These findings apparently support the need for appropriate pedagogic training of PSTs to scientifically reflect on and professionally make use of models in science classes.     

Finding the Hook: Computer Science Education in Elementary Contexts

The purpose of this study was to investigate how elementary teachers with little knowledge of computer science (CS) and project-based learning (PBL) experienced integrating CS through PBL as a part of a standards-based elementary curriculum in Grades 3–5. The researchers used qualitative constant comparison methods on field notes and reflections to describe the teachers' participation in professional development to create CS-infused projects to be implemented with their students. Categories that emerged included standards integration, student autonomy, and challenges of infrastructure and time. The data are from the first 6 months of a 3-year, National Science Foundation-funded project. (Keywords: computer science, project-based learning, integration, elementary curriculum)