information that is essential to understanding a situation or problem
a person's social heritage: previous experience or training
information that is essential to understanding a situation or problem
relatively unimportant or inconspicuous accompanying situation
extraneous signals that can be confused with the phenomenon to be observed or measured
the state of the environment in which a situation exists
understate the importance or quality of
scenery hung at back of stage
the psychological result of perception and learning and reasoning
