PROBLEM-SOLVING PERFORMANCE AND MATHEMATICS ACHIEVEMENT: THE MEDIATING ROLE OF EYE TRACKING MEASUREMENTS

The purpose of the present study was to propose a model for mathematics achievement considering the mediating role of eye tracking measurements in the relationship between problem solving performance and mathematics achievement. In this sequential explanatory mixed method research design, a geometry test was conducted to 381 7th grade students. Their problem-solving process was recorded using eye tracking technology. Also, their mathematics achievement scores were acquired from their schools. Afterwards, semi-structured interviews were conducted to 15 students. Based on the results, it was observed that there was a positive relationship among problem-solving performance and mathematics achievement while eye tracking measurements were negatively correlated to problem solving performance and mathematics achievement. Qualitative findings also confirmed these results. Moreover, the hypothesized model could approximately express 22% of the variance on mathematics achievement

PROSPECTIVE MATHEMATICS TEACHERS’ ABILITY TO IDENTIFY MISTAKES RELATED TO ANGLE CONCEPT OF SIXTH GRADE STUDENTS

In the present study we try to highlight prospective mathematics teachers’ ability to identify mistakes of sixth grade students related to angle concept. And also an examination of prospective mathematics teachers conceptions of angle. Study was carried out with 30 sixth-grade students and 38 prospective mathematics teachers. Sixth grade students required to define the concept of angle with their own statements and describe what it brought to their minds by writing their responses on a paper.  Students written responses were examined by the researchers and students’ mistakes in their definitions were determined. A data collection form that included students’ definitions of angle (correct, partly correct, incorrect) was obtained. Prospective teachers were required to define the concept of angle with their own statements and evaluate whether sixth grade students’ responses were correct by explaining the reasons in written form. The data obtained from written forms of prospective teachers were analysed through the descriptive analysis technique. Candidate's' comments they have made in response to each student are coded. The results of the research show that prospective mathematics teachers didn’t have problems in determining students' definitions of angle as correct, incorrect or partially correct. But they have problems about expressing the students’ failures and to clearly identifying the mistakes in the incorrect definitions of students. Additionally, almost all of the candidates have made only the static definition of the angle concept.  Article visualizations

Peri-operative red blood cell transfusion in neonates and infants: NEonate and Children audiT of Anaesthesia pRactice IN Europe: A prospective European multicentre observational study

BACKGROUND: Little is known about current clinical practice concerning peri-operative red blood cell transfusion in neonates and small infants. Guidelines suggest transfusions based on haemoglobin thresholds ranging from 8.5 to 12 g dl-1, distinguishing between children from birth to day 7 (week 1), from day 8 to day 14 (week 2) or from day 15 (≥week 3) onwards. OBJECTIVE: To observe peri-operative red blood cell transfusion practice according to guidelines in relation to patient outcome. DESIGN: A multicentre observational study. SETTING: The NEonate-Children sTudy of Anaesthesia pRactice IN Europe (NECTARINE) trial recruited patients up to 60 weeks' postmenstrual age undergoing anaesthesia for surgical or diagnostic procedures from 165 centres in 31 European countries between March 2016 and January 2017. PATIENTS: The data included 5609 patients undergoing 6542 procedures. Inclusion criteria was a peri-operative red blood cell transfusion. MAIN OUTCOME MEASURES: The primary endpoint was the haemoglobin level triggering a transfusion for neonates in week 1, week 2 and week 3. Secondary endpoints were transfusion volumes, 'delta haemoglobin' (preprocedure - transfusion-triggering) and 30-day and 90-day morbidity and mortality. RESULTS: Peri-operative red blood cell transfusions were recorded during 447 procedures (6.9%). The median haemoglobin levels triggering a transfusion were 9.6 [IQR 8.7 to 10.9] g dl-1 for neonates in week 1, 9.6 [7.7 to 10.4] g dl-1 in week 2 and 8.0 [7.3 to 9.0] g dl-1 in week 3. The median transfusion volume was 17.1 [11.1 to 26.4] ml kg-1 with a median delta haemoglobin of 1.8 [0.0 to 3.6] g dl-1. Thirty-day morbidity was 47.8% with an overall mortality of 11.3%. CONCLUSIONS: Results indicate lower transfusion-triggering haemoglobin thresholds in clinical practice than suggested by current guidelines. The high morbidity and mortality of this NECTARINE sub-cohort calls for investigative action and evidence-based guidelines addressing peri-operative red blood cell transfusions strategies. TRIAL REGISTRATION: ClinicalTrials.gov, identifier: NCT02350348

Relationship Between Proof Schemes Used by Preservice Mathematics Teachers and Gender, Views Towards Proof

AbstractThe aim of this study is to examine whether there is a relationship between gender and proof schemes used by first and final year preservice teachers attending primary and secondary education mathematics teaching program of a state university in 2011-2012 and also to investigate their general views towards proof. The study was carried out on a total of 98 preservice mathematics teachers. In order to describe current situation screening model was used. Students were asked to solve 9 problems and which proof schemes were belonged to their answers were determined. So as to set down proof schemes classification which was constituted by Harel and Sowder (1998) was used. According to the gender regarding proof schemes used by preservıce teachers in the justification process of problems t table was created. Preservice teachers were interviewed so as to determine their views on proving 4 open ended questions were asked. Conversational data was given in the form of examples and in general terms. According to the results of analysis as significant differences was detected by gender in the use of some of schemes, some was concluded that the difference was not significant. Suggestions have been made on the basis of the data obtained at the end of the research

Relationship Between Proof Schemes Used by Preservice Mathematics Teachers and Gender, Views Towards Proof

The aim of this study is to examine whether there is a relationship between gender and proof schemes used by first and final year preservice teachers attending primary and secondary education mathematics teaching program of a state university in 2011-2012 and also to investigate their general views towards proof. The study was carried out on a total of 98 preservice mathematics teachers. In order to describe current situation screening model was used. Students were asked to solve 9 problems and which proof schemes were belonged to their answers were determined. So as to set down proof schemes classification which was constituted by Harel and Sowder (1998) was used. According to the gender regarding proof schemes used by preservice teachers in the justification process of problems t table was created. Preservice teachers were interviewed so as to determine their views on proving 4 open ended questions were asked. Conversational data was given in the form of examples and in general terms. According to the results of analysis as significant differences was detected by gender in the use of some of schemes, some was concluded that the difference was not significant. Suggestions have been made on the basis of the data obtained at the end of the research. (C) 2013 The Authors. Published by Elsevier Ltd

The Hopelessness Level of 3rd Grade Elementary Mathematics Preservice Teachers' and Their Perspectives About Future

The aim of this study is to determine the hopelessness level of 3rd grade elementary mathematics preservice teachers and their perspectives about future at agovernment university in 2011 - 2012 academic year. The sample of the study is 73 elementary preservise teacher. Because the existing situation aimed to be determine screening model used. The 20 item Beck Hopelessness scale scale that was generated by Beck et. al (1974), and raliability and validity test was made by Seber (1991) and Durak (1994) is used to determine the hopelessness level of 3rd grade elementary mathematics preservice teachers and their perspectives about future. The hopelessness interval is determined by calculating the avarage score. 4 open ended questions are also asked. Suggestions made in accordance with the results of teh study. (C) 2013 The Authors. Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Academic World Education and Research Center.Wo

Effect of Orally-Administered 17 alpha-Methyltestosterone at Different Doses on the Sex Reversal of the Nile Tilapia (Oreochromis niloticus, Linneaus 1758)

WOS: 000288716800008In order to obtain all male population, the Nile tilapia (Oreochromis niloticus) larvae which just finished the yolk sac were fed with feed containing 17 alpha-Methyltestosterone at five different doses (0, 20, 30, 40, 50 and 60 mgMT kg(-1) feed) for 28 days. As a result of the experiment repeated twice, it was found out that the sex reversal rates among the groups were at the levels of 57.1, 69.8, 69.4, 70.9, 86.1 and 93.7%, respectively. Furthermore, it was observed that the highest sex reversal rate occurred in the group to which 60 mgMT kg(-1) feed dose was applied

Anaesthetic Management of a Child with a Massive Mediastinal Mass

Mediastinal masses are benign or malignant tumours that originate from the thymus, thyroid, lung, lymphoid system, pleura, or pericardium. Cardiovascular and respiratory symptoms may occur because of the compression of surrounding tissues along with growing mass. In this study, we present the anaesthetic management of a 6-month-old child having a massive anterior mediastinal mass that had a compressing effect

The Hopelessness Level of 3rd Grade Elementary Mathematics Preservice Teachers' and Their Perspectives about Future

The aim of this study is to determine the hopelessness level of 3rd grade elementary mathematics preservice teachers and their perspectives about future at agovernment university in 2011 - 2012 academic year. The sample of the study is 73 elementary preservise teacher. Because the existing situation aimed to be determine screening model used. The 20 item Beck Hopelessness scale scale that was generated by Beck et. al (1974), and raliability and validity test was made by Seber (1991) and Durak (1994) is used to determine the hopelessness level of 3rd grade elementary mathematics preservice teachers and their perspectives about future. The hopelessness interval is determined by calculating the avarage score. 4 open ended questions are also asked. Suggestions made in accordance with the results of teh study. (C) 2013 The Authors. Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Academic World Education and Research Center

A study of efficiency activity on logarithm

This study is intended for eliminating the mistakes that the students occasionally make Regarding some of the characteristics of logarithm. Inparticular, the fact that the students Controlled by an education system based on rote-learning develop prejudgements against the present logarithm and often mis remember the understanding of the characteristics of logarithm resulted in looking for an answer as to what kind of solutions may be offered by utilizing the technology at hand in this respect. To that end, some of the characteristics of logarithma represented by visualization through the use of a Flash, a device which establishes a graphical content for the dynamic geometry software, Geogebra and World Wide Web. Eliminating the probable mistakes that the students might make in these characteristics of logarithm is intended, with the thought that the visualized concepts will contribute to learning in a more efficient way. (C) 2012 Published by Elsevier Ltd. Selection and/or peer review under responsibility of Prof. Dr. Huseyin Uzunboyl