The aim of this study was to investigate the effects web-based multimedia annotated vocabulary learning in context model and in spaced repetitions on vocabulary retention of intermediate level English language learners. The research study encompassed two main faces which was related to development of the material and implementation of it. In WEBVOCLE, which stands for web-based vocabulary learning material, the contextual presentation of vocabulary were enriched with audible online dictionary, pictures and animations / target words were repeated by the learners with interactive exercises, such as gap-filling, cloze and multiple choice test, games, puzzles, in &lsquo / spaced repetitions&rsquo / . In the study both qualitative and quantitative data were gathered through attitude questionnaires, checklists, interviews, focus group interviews and through vocabulary retention tests. The qualitative data were analyzed according to qualitative data analysis techniques and quantitative data were analyzed using SPSS statistics software. Feedback obtained from the learners demonstrated that they not only developed a positive attitude toward English vocabulary language learning but also increased their vocabulary retention level of the target vocabulary through spaced repetitions.

Straight cooling channels are the most common method of controlling part temperature in injection molding process. However, straight cooling channels are not enough to manage temperature uniformity of the parts. In this work, a numerical study is conducted to decrease cycle time and cost of the injection molded parts by using conformal cooling channels. For this purpose, the commercial injection molding simulation program Moldflow is used. The governing physical equations for injection molding were derived and presented. The assumptions of the model were checked for simple geometries by comparing analytical results and numerical results of Moldflow. Then, the effect of conformal cooling channels is investigated for injection molding of a half cylinder shell part. It was seen that conformal cooling channels cools part faster and more uniform than straight cooling channels without corruption on the surface appearance. Finally, a real life case study was presented. For this purpose, a refrigerator shelf that is manufactured by the Ar&ccedil / elik Company was studied. The process was simulated using actual process parameters and simulation results were compared with production results. Then, the process was simulated using conformal cooling channels and compared with production results. It is seen that the cycle time of the refrigerator shelf was decreased considerably while preserving surface quality appearance.

ABSTRACT THE EFFECTS OF COGNITIVE LOAD IN LEARNING FROM GOAL BASED SCENARIO DESIGNED MULTIMEDIA LEARNING ENVIRONMENT FOR LEARNERS HAVING DIFFERENT WORKING MEMORY CAPACITIES Kili&ccedil / , Eylem Ph.D., Department of Computer Education and Instructional Technology Supervisor: Assoc. Prof. Dr. Zahide Yildirim December 2009, 201 pages The purpose of this study is to investigate the effects of principles aiming to reduce extraneous cognitive load in learning from goal based scenario designed multimedia learning environment for learners having different working memory capacities. In addition, the effects of goal based scenario and the principles of cognitive load theory on students&rsquo / perception, motivation and satisfaction has been explored. Two versions of the multimedia were developed for this study. In the first version (+CLT), the principles such as split attention, multimedia, modality, redundancy, coherence and signaling was applied. In the second version (-CLT), these principles were violated. Mixed method was used and two studies were conducted for this study. The first study was conducted with 82 ninth grade students from one of the Anatolian High School in Ankara. However, the participants&rsquo / working memory capacities were found very close to each other. Therefore, the second study was conducted with 54 11th grade students having different working memory capacity from the same school. The result of the first study showed that the cognitive load principles aim at reducing extraneous cognitive load increased learning gains, decreased invested mental effort and affected students&rsquo / motivation and satisfaction in positive ways. On the other hand, when cognitive load principles were not considered, this decreased learning gains, increased invested mental effort and affected students&rsquo / motivation and satisfaction in negative ways. The result of the second study showed that the only difference between high and low WMC students found on the number of errors made in sequencing meiosis sub phases in favor of the first version (+CLT). This might be explained by the task characteristics in that the difference between high and low WMC individuals can be observed when task demanded attention. It can be concluded that students benefited from the cognitive load principles reducing extraneous cognitive based on the findings of both studies.

The purpose of this study was to investigate the contribution of 11th grade Turkish students&rsquo / chemistry self-efficacy for cognitive skills (CSCS), and self-efficacy for chemistry laboratory (SCL), mastery-approach goals, mastery-avoidance goals, performance-approach goals, and performance-avoidance goals to their chemistry achievement. The sample of the study included 604 students (343 females and 261 males) from seven different general public high schools in &Ccedil / ankaya, a district of Ankara. High School Chemistry Self-efficacy Scale which was developed by &Ccedil / apa Aydin and Uzuntiryaki (2009), Achievement Goal Questionnaire which was developed by Elliot and McGregor (2001), and Chemistry Achievement Test (CAT) which was developed by the researcher were used to collect the data in the study. The simultaneous multiple regression analysis was used to analyze the data of the study. Results revealed that the students&rsquo / CSCS, mastery-approach goal, performance-approach goal were a positive significant predictors and performance-avoidance goal was a negative significant predictor of their scores on the CAT. Students&rsquo / CSCS had the largest unique contribution to explaining the students&rsquo / chemistry achievement. These four independent variables explained a significant 9.1 % of variance in the students&rsquo / chemistry achievement.

The primary goal of this thesis was to test the validity of the Full Transfer Full Access (FTFA) Hypothesis on the acquisition of island constraints by Turkish learners of English. The FTFA Hypothesis claims that L2ers have access to UG even at the initial state, which is assumed to be the final state of L1, and there is a gradual restructuring of L2 grammar. The second goal was to investigate whether Turkish learners of English employ the same parsing strategies in bi-clausal wh-questions. If so, the results would support the Continuity Hypothesis arguing that Universal Parser is available in SLA. Four experiments were conducted in this study. The first two experiments were devised to shed light on the acquisition and processing of island constraints. Two experimental groups (30 intermediate and 30 advanced learners of English) and a control group (30 native speakers of English) were employed for these tests. The third and fourth experiments were administered to display whether there were similarities between the way native speakers of Turkish and English resolve ambiguities and whether island constraints were operative in Turkish. 30 native speakers of Turkish participated in these experiments. The results showed that different processing strategies for the resolution of ambiguities were employed in English and Turkish and island constraints were not operative in Turkish. Besides, Turkish learners of English had access to UG and there was a developmental pattern for the restructuring of L2 grammar. Furthermore, a gradual approximation to the native speakers&rsquo / parsing strategies was observed.

High-quality preschool education produces substantial long-term educational, social, and economic benefits, but large benefits occur only when teachers are professionally prepared and adequately compensated. Qualifying the teacher candidates depends on many interrelated components of a teacher education. The aim of this study is to evaluate the student selection policy, decision-making policy, recruitment policy, teacher candidates&rsquo / educational profiles, faculty development and assignment policy, curriculum and instruction, and the graduates&rsquo / competences from the perspectives of the faculty members in the preschool teacher education program. For this purpose, decision-oriented program evaluation CIPP model is taken as a framework. In order to reach in-depth and detailed information from the participants, study is designed as a qualitative phenomenological research. Participants are selected through purposeful sampling strategies that include criterion sampling and snowball sampling procedures from the population of 150 academicians in the 55 preschool teacher education program in Turkey. Data is collected through semi-structured interviews and open-ended questionnaires from 58 participants. According to the content analysis, findings indicated that there is need for the additional tests in the student selection, improvement in the faculty development policy, accreditation, faculty initiative in curriculum planning and implementing, alternative strategies in practicum, and collaboration of the local authorities and the faculties in the recruitment policy of the graduates. In this respect, it is believed that the findings will pave the way for the program developers to reform the program accordingly, will give further insights about the real experiences of the academicians and take their suggestions to improve the program and will help the researchers to raise some new questions about the preschool teacher education program to investigate.

High-quality preschool education produces substantial long-term educational,social, and economic benefits, but large benefits occur only when teachers are professionally prepared and adequately compensated. Qualifying the teacher candidates depends on many interrelated components of a teacher education. The aim of this study is to evaluate the student selection policy, decision-making policy, recruitment policy, teacher candidates&rsquo / educational profiles, faculty development and assignment policy, curriculum and instruction, and the graduates&rsquo / competences from the perspectives of the faculty members in the preschool teacher education program. For this purpose, decision-oriented program evaluation CIPP model is taken as a framework. In order to reach in-depth and detailed information from the participants, study is designed as a qualitative phenomenological research. Participants are selected through purposeful sampling strategies that include criterion sampling and snowball sampling procedures from the population of 150 academicians in the 55 preschool teacher education program in Turkey. Data is collected through semi-structured interviews and open-ended questionnaires from 58 participants. According to the content analysis, findings indicated that there is need for the additional tests in the student selection, improvement in the faculty development policy, accreditation, faculty initiative in curriculum planning and implementing, alternative strategies in practicum, and collaboration of the local authorities and the faculties in the recruitment policy of the graduates. In this respect, it is believed that the findings will pave the way for the program developers to reform the program accordingly, will give further insights about the real experiences of the academicians and take their suggestions to improve the program and will help the researchers to raise some new questions about the preschool teacher education program to investigate.

The main purpose of the present study was to investigate the effect of 7E learning cycle model as an inquiry-based learning on the improvement of 5th grade students&rsquo / critical thinking skills. This study was conducted during 2005-2006 spring semester in a private primary school in Sakarya. A total of 46 fifth grade students from two different classes of the same science teacher was involved in the study. Two classes were randomly assigned as experimental group and control group. While students in the control group were instructed with traditional method, inquiry-based learning was carried out in the experimental group. Since phenomena that show cause and effect relationships are good inquiry subjects, water cycle in the science and technology curriculum was taken as the unit in the present study. The Cornell Conditional Reasoning Test, from the Cornell Critical Thinking Skills Tests Series was administered as pre-test and post-test to students both in the experimental and control groups. The effects of gender and family income of the students on the dependent variable were also checked. Statistical Analysis of Covariance was used to test the hypotheses of this study. The results indicated that the experimental group achieved significantly better than the control group in both the critical thinking skill test. In other words, inquiry-based learning improved students&rsquo / critical thinking skills. On the other hand, no significant effect of gender and family income on improvement of students&rsquo / critical thinking skills was found.

The purposes of this study were to examine (a) health promoting behaviors, (b) physical activity levels, (c) exercise stages of change levels, and (d) exercise preferences of students who had just entered the university by gender and residence. Participants were 438 students from Middle East Technical University (METU) English Preparatory school. Adolescent Health Promotion Scale (AHPS), International Physical Activity Questionnaire (IPAQ), Physical Activity Stages of Change Questionnaire (PASCQ), and Physical Activity Preferences Check-list were used for the data collection. Descriptive statistics, nonparametric statistical methods (Mann Whitney U test, Pearson chi-square test), and a one-way MANOVA were used for the data analysis. According to AHPS results, female students&amp / #8217 / health promoting behaviors were better than those of male students except exercise behavior. Students living at home had higher scores on nutrition behavior and students living in dormitory had higher scores on stress management behavior (p &lt / .05). According to the IPAQ results, male students were more physically active than female counterparts. Students who were living in dormitory had higher physical activity levels than students living at home (p &lt / .05). PASCQ findings indicated no significant differences on the exercise stages of change levels by gender and residence (p &gt / .05). In general, students were at pre-contemplation 9.2%, contemplation 39.3%, preparation 27.8%, action 14.5%, and maintenance 9.2% stages. Swimming, walking, and table tennis were the three most frequently preferred physical activities. In conclusion, female students had better health promoting behaviors than those of male students except exercise behavior. Female students and students living at home were more at risk of inactivity. Approximately 80% of the METU English Preparatory school students&amp / #8217 / physical activity levels were not satisfactory for a healthy life. University physical activity facilities, extracurricular programs and the courses should be reconsidered to support the health promoting behaviors of these students.