Achievement tests are commonly used in education to evaluate students' academic performance and proficiency in specific subject areas. However, there is a major problem that threatens the validity of achievement test scores which is test-taking disengagement. Respondents provide answers that are inconsistent with their true ability level and can…

Many students view PISA as a low-stakes assessment. Their lack of willingness to give the assessment "their all" is reflected in students' performance. Boys are often disengaged, resulting in low test performance. Disengagement should be measured in various different ways to better understand it and improve assessment design.