信度高的测试,其得分差别能正确反映应试者之间的真实差别,否则便导致误差。人们设计试题时下很大功夫,就是为了减少这种误差。测试人和测试条件诸因素的变化,可称为误差的外在根源,其影响可通过事先采取常识性措施而大大减小。测试人不同带来的影响,恰当地采用客观性试题,即可有效地避免。为减小测试条件的影响, High reliability test, the difference between the scores can correctly reflect the true differences between the test subjects, otherwise it will lead to errors. People now devote themselves to designing test questions in order to reduce such errors. The changes of the test persons and the factors of the test conditions can be called the external causes of the errors, and their influence can be greatly reduced by adopting common sense measures in advance. Test the impact of different people, the proper use of objectivity test, you can effectively avoid. To reduce the impact of test conditions,