This study aims to investigate the impact of the number of test items in the National Compulsory Education Primary School Science Quality Monitoring Test on reliability.Using the Generalizability Theory and a complete crossover design,an analysis was conducted to examine the reliability of each test form and the effect of the number of test items on reliability through generalizability study and decision study.At the test form level,except for test form 5,the reliability of the 2017 primary school science test forms was generally high,with reliability values above 0.80.For the six test forms,increasing the number of test items improved the test's reliability,although the rate of reliability improvement gradually diminished.Once the number of test items reached a certain level,the impact of further increasing the number of items on reliability became minimal.When the number of items in each test form was around 45,the test form's reliability was maintained at a high level.At the overall test level,the generalizability coefficient and reliability coefficient were 0.933 and 0.928,respectively,indicating good test reliability.On the condition that the quality of test items is ensured,if a reduction in the number of items is necessary,the total number of test items could be reduced from 109 to 98.
关键词
义务教育质量监测/小学科学/题目数量/测验信度
Key words
Monitoring the Quality of Compulsory Education/Elementary Science/Number of Questions/Test Reliability
维普
万方数据