Attributes of objects, events or things that can be measured are called

Attributes of objects, events or things that can be measured are called variables.

A variable is any characteristic that takes on different values across cases.

Qualitative measures describe categories or qualities rather than naming the measurable attribute itself.

Data are the recorded values obtained from variables, not the attributes themselves.

Constants are characteristics that do not vary and so cannot serve as variables.

Variables may be classified as independent, dependent, extraneous or intervening by their role.