Diagnosis of eleventh grade students' misconceptions about geometric optic by a three-tier test

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2005
Kutluay, Yasin
The main purpose of this study was developing a three-tier test for assessing 11th grade students̕ misconceptions about geometric optic. The accessible population was all 11th grade science students in Bayrampasa, Istanbul. While developing the test, interviews and open-ended tests were used to collect data to create the three-tier test. An interview questionnaire was developed based on the literature review. 15 11th grade students were interviewed by this questionnaire. Then, an open-ended test was created based on the interview results and also the literature review. It was applied to 114 11th grade science students. The responses of the students for each item were categorized considering the frequencies. Then, these categories were used in the development of the Three-tier Geometric Optic Misconception Test (TTGOMT). The categories were used as the distracters of the items in the TTGOMT. Besides, some of the distracters were extracted from the interview results and the literature review even if they had no frequencies in open-ended test results. The test was applied to the 141 11th grade high school students. A factor analysis was conducted to establish the content validity of the TTGOMT and five categories were found. Also, the proportions of the false positives and false negatives were estimated to establish the content validity and found 28.2 % for the false positives and 3.4 % for false negatives. The construct validity was established by estimating a correlation between the scores of the students for the first two tiers and confidence levels for the third tier. Two reliability analyses were conducted by using Cronbach alpha. One of the reliability analyses was estimated based on the correct answers of the students for all the three tiers together and found 0.55. The other one was estimated based on the misconceptions of the students and found 0.28. Moreover,

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Citation Formats
Y. Kutluay, “Diagnosis of eleventh grade students’ misconceptions about geometric optic by a three-tier test,” M.S. - Master of Science, Middle East Technical University, 2005.