Two primary issues in psychological measurement: validity of measurement: determining whether a test measures what it is supposed to measure, validity of decisions: determining whether that test can be used in making accurate decisions. Content domain: every psychological test is a systematic sample from a particular domain of behavior, content validity describes a judgment of how adequately a test samples behavior that is representative of the universe or domain of behavior. A content domain has boundaries: a detailed description of the content domain to be measured allows one to determine whether each test item lies within the boundaries of the domain. Tests should sample all parts of the content domain. Tests should devote the largest number of items to the larger, more important areas of the domain. 5: black humor: jokes or cartoons on dramatic events, catastrophes, or physical or other damage. Content validity: an example: 7 judges rated each item.