Item Analysis Is

Item analysis is

A) based on the proposition that there is consistency in the response patterns of the subjects when the items are ambiguous.
B) a procedure for increasing the reliability and validity of a test by increasing the number of items.
C) a procedure of determining the degree of favorableness and unfavorableness of items.
D) a procedure to determine whether the total test discriminates in the same way the individual items discriminate.
E) a procedure whereby each test item is evaluated to determine whether that item effectively discriminates among subjects and therefore should be included in the final version of the instrument.