| Summary: | 碩士 === 玄奘大學 === 企業管理學系碩士在職專班 === 104 === This study aims to analyze the items of physics and chemistry examinations for junior high school students. To investigate the answered situation on a periodical achievement test in physics and chemistry of a junior high school in Beitou District, Taipei City, Software Excel2010, SPSS12.0, TestGraf98, and Tester for Windows2.0Keyword:physics and chemistry;item analysis.are used to conduct both qualitative and quantitative analyses for overall content and individual items. After assessing the quality of the items, it is expected that the outcomes can be helpful to build an effective database of examination questions. Furthermore, the findings of the study will provide a better understanding of how the students learn physics and chemistry and what their learning difficulties are for teachers who would like to enhance their teaching quality.
The findings of this study are summarized as follows:
1. There is a bimodal distribution of the testees’ scores as well as their academic performance.
2. This test achieves positive content validity to assess students’ competence.
3. The internal consistency reliability .91, calculated by SPSS, is in line with the difficulty degree of good items in educational examinations.
4. The average item difficulty discrimination index with .60 suggests it is a test with medium difficulty, conforming to proper difficulty of good questions.
5. The average item discrimination index with .58 suggests the good discrimination of the test.
6. Except option A of Item 12, all the other items have good distracting effect.
7. Caution index for Problems shows that there are five heterogeneous items. The modification of these questions is necessary, while the rest are good and appropriate items.
8. The result of Caution Index for Students indicates that more than sixty percent of the testees were not well-prepared or careful enough.
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