PSYC 3250 Lecture Notes - Lecture 13: Discriminant, Concurrent Validity, Base Rate
Document Summary
2 primary issues in psychological measurement: validity of measurement. Determining whether a test measures what it is supposed to measure: validity for decisions. Determining whether that test can be used in making accurate decisions. Every psychological test is a systemaic sample from a paricular domain of behaviours. Content validity describes a judgement of how adequately a test samples behaviour that is representaive of the universe or domain of behaviour: a content domain has boundaries. A detailed descripion of the content domain to be measured allows one to determine whether each test item lies within the boundaries of the domain: assessing content validity. Content validity represents a judgement regarding the degree to which a test provides an adequate sample of a paricular content domain. Determine the areas of the content domain that are measured by each test item. Compared the structure of the test with the structure of the content: demonstrate content validity domain.