Accessibility can best be understood by contrasting the knowledge, skills, and abilities that reflect the construct(s) that are not the target of the test but are required to respond to the test tasks or test items. For some test takers, factors related to individual characteristics such as age, race, ethnicity, socioeconomic status, cultural background, disability, and/or English language proficiency may restrict accessibility and thus interfere with the measurement of the construct(s) of interest. For example, a test taker with impaired vision may not be able to access the printed text of a personality test. If the test were provided in large print, the test questions could be more likely to lead to a valid measurement of the test taker’s personality characteristics. It is important to be aware of test characteristics that inadvertently render test questions less accessible for some subgroups of the intended testing population. For example, a test question that employ idiomatic phrases unrelated to the construct being measured could have the effect of making the rest less accessible for test takers who are not native speakers of English. The accessibility of a test could also be decreased by questions that use regional vocabulary unrelated to the target construct or use stimulus contexts that are less familiar to individuals from some cultural subgroups than others.