Assessments that are administered and scored in exactly the same way for all students. Traditional standardized tests are typically mass-produced and machine-scored they are designed to measure skills and knowledge that are thought to be taught to all students in a fairly standardized way. Performance assessments also can be standardized if they are administered and scored in the same way for all students.
A test that is in the same format for all who take it. It often relies on multiple-choice questions and the testing conditions—including instructions, time limits, and scoring rubrics—are the same for all students, though sometimes accommodations on time limits and instructions are made for disabled students. (Ed Source)