The significant technological advances observed in the 21st century and resulting sociological ch... more The significant technological advances observed in the 21st century and resulting sociological changes require social adaptation. These changes created an essential role for the teachers to instruct the changing qualifications. The present study aimed to determine the profile of preschool teachers in Turkey. Thus, this research was designed as a descriptive study. The study group included 652 teachers. Most of the teachers participating in the research were female participants. Most of the teachers are graduates of pre-school education. However, there are also teachers who have graduated from child development and other fields. The "Turkish Preschool Education Student Profile Questionnaire" developed by Erkan et al. (2001) was adapted by the authors to research the teacher profile. When the findings were examined, it was found that 86% of the teachers participated in educational activities, and these educational activities generally participated in in-service trainings, sc...
WOS:000449986600010Purpose of the Study: Missing data are a common problem encountered while impl... more WOS:000449986600010Purpose of the Study: Missing data are a common problem encountered while implementing measurement instruments. Yet the extent to which reliability, validity, average discrimination and difficulty of the test results are affected by the missing data has not been studied much. Since it is inevitable that missing data have an impact on the psychometric properties of measurement instruments, it was considered necessary to investigate this topic. Depending on the identified need, a simulative study was conducted on the effects of missing data on reliability. The reliability estimates were discussed in terms of generalizability theory (G theory). Research Methods: Depending on the research questions, complete data sets having different sample sizes (100, 200, 400, 1000) in weak and strong one-dimensional structures under normal distribution were produced. Missing data sets were created by deleting data at different rates (5%, 10%, 20%, 30%) randomly from the complete s...
The objective of this study was to adapt the Pre-Adolescent Decision-Making Competence Test to Tu... more The objective of this study was to adapt the Pre-Adolescent Decision-Making Competence Test to Turkish, which was originally developed in English by Weller, Levin, Rose and Bossard (2012) for assessing decision-making competence of children between the ages of 9 and 14. For this purpose; a) the test and instructions were translated into Turkish, b) the Turkish test was administered to a group of 398 students as a pilot, c) retest was administered to a group of 97 students, and finally, d) a group of 382 students was subject to a norm study. The Confirmatory Factor Analysis model created by the data of the pilot administration was well adapted, and one-factor model was verified for construct validity. As the construct of the test was altered, a Confirmatory Factor Analysis was performed on the data obtained from the norm study. A construct similar to that acquired from the data of the first test administration and the results obtained have even relatively better fit indices. Although...
The objective of this study was to adapt the Pre-Adolescent Decision-Making Competence Test to Tu... more The objective of this study was to adapt the Pre-Adolescent Decision-Making Competence Test to Turkish, which was originally developed in English by Weller, Levin, Rose and Bossard (2012) for assessing decision-making competence of children between the ages of 9 and 14. For this purpose; a) the test and instructions were translated into Turkish, b) the Turkish test was administered to a group of 398 students as a pilot, c) retest was administered to a group of 97 students, and finally, d) a group of 382 students was subject to a norm study. The Confirmatory Factor Analysis model created by the data of the pilot administration was well adapted, and one-factor model was verified for construct validity. As the construct of the test was altered, a Confirmatory Factor Analysis was performed on the data obtained from the norm study. A construct similar to that acquired from the data of the first test administration and the results obtained have even relatively better fit indices. Although...
The significant technological advances observed in the 21st century and resulting sociological ch... more The significant technological advances observed in the 21st century and resulting sociological changes require social adaptation. These changes created an essential role for the teachers to instruct the changing qualifications. The present study aimed to determine the profile of preschool teachers in Turkey. Thus, this research was designed as a descriptive study. The study group included 652 teachers. Most of the teachers participating in the research were female participants. Most of the teachers are graduates of pre-school education. However, there are also teachers who have graduated from child development and other fields. The "Turkish Preschool Education Student Profile Questionnaire" developed by Erkan et al. (2001) was adapted by the authors to research the teacher profile. When the findings were examined, it was found that 86% of the teachers participated in educational activities, and these educational activities generally participated in in-service trainings, sc...
WOS:000449986600010Purpose of the Study: Missing data are a common problem encountered while impl... more WOS:000449986600010Purpose of the Study: Missing data are a common problem encountered while implementing measurement instruments. Yet the extent to which reliability, validity, average discrimination and difficulty of the test results are affected by the missing data has not been studied much. Since it is inevitable that missing data have an impact on the psychometric properties of measurement instruments, it was considered necessary to investigate this topic. Depending on the identified need, a simulative study was conducted on the effects of missing data on reliability. The reliability estimates were discussed in terms of generalizability theory (G theory). Research Methods: Depending on the research questions, complete data sets having different sample sizes (100, 200, 400, 1000) in weak and strong one-dimensional structures under normal distribution were produced. Missing data sets were created by deleting data at different rates (5%, 10%, 20%, 30%) randomly from the complete s...
The objective of this study was to adapt the Pre-Adolescent Decision-Making Competence Test to Tu... more The objective of this study was to adapt the Pre-Adolescent Decision-Making Competence Test to Turkish, which was originally developed in English by Weller, Levin, Rose and Bossard (2012) for assessing decision-making competence of children between the ages of 9 and 14. For this purpose; a) the test and instructions were translated into Turkish, b) the Turkish test was administered to a group of 398 students as a pilot, c) retest was administered to a group of 97 students, and finally, d) a group of 382 students was subject to a norm study. The Confirmatory Factor Analysis model created by the data of the pilot administration was well adapted, and one-factor model was verified for construct validity. As the construct of the test was altered, a Confirmatory Factor Analysis was performed on the data obtained from the norm study. A construct similar to that acquired from the data of the first test administration and the results obtained have even relatively better fit indices. Although...
The objective of this study was to adapt the Pre-Adolescent Decision-Making Competence Test to Tu... more The objective of this study was to adapt the Pre-Adolescent Decision-Making Competence Test to Turkish, which was originally developed in English by Weller, Levin, Rose and Bossard (2012) for assessing decision-making competence of children between the ages of 9 and 14. For this purpose; a) the test and instructions were translated into Turkish, b) the Turkish test was administered to a group of 398 students as a pilot, c) retest was administered to a group of 97 students, and finally, d) a group of 382 students was subject to a norm study. The Confirmatory Factor Analysis model created by the data of the pilot administration was well adapted, and one-factor model was verified for construct validity. As the construct of the test was altered, a Confirmatory Factor Analysis was performed on the data obtained from the norm study. A construct similar to that acquired from the data of the first test administration and the results obtained have even relatively better fit indices. Although...
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Papers by Haydar Karaman