項こう目もく応おう答とう理り論ろんMeaningsNoun1. item response theory; IRTKanji used項paragraph目eye応respond with action答answer理logic論argumentComposed of項こう目もくitem; heading; category; clause; headword (in a dictionary, encyclopedia, etc.); entryNoun応おう答とうreply; answer; responseNoun理り論ろんtheoryNoun