<prompt> Validity of a test is based upon all exceptSensitivitySpecificityPrecisionAccuracy  <response>: Ref:Parks 23rd edition pg 138 Validity accuracy: refers to what extend the test accurately measures which it purpos to measure. has two components: sensitivity and specificity. note: Precision repeatability reliability: that is test must give consistent redults when repeated more than once on the same individual or material, under same conditions. 