In
psychometrics,
content validity (also known as
logical validity) refers to the extent to which a measure represents all facets of a given
social construct. For example, a
depression scale may lack content validity if it only assesses the
affective dimension of depression but fails to take into account the
behavioral dimension. An element of subjectivity exists in relation to determining content validity, which requires a degree of agreement about what a particular
personality trait such as
extraversion represents. A disagreement about a personality trait will prevent the gain of a high content validity.