The Arizona Tax Research Association analyzed the Arizona Teacher Proficiency Examination (ATPE). An item analysis of the 150 questions administered to 2,430 applicants from July 1982 through March 1983 was undertaken. A minimum point biserial correlation coefficient of .33 indicated the validity of an item. Nearly two-thirds (64 percent) of the items on the Reading section of the ATPE appear to be invalid, while 32 percent of the questions on the Math and 20 percent of the questions on the Grammar sections appear invalid. The discriminant validity of the ATPE is seriously questioned by this finding. (BW)