Yanika Lunrasri|Kamonwan Tangdhanakanond|Shotiga Pasiphol
Analysis of parallel reading literacy instruments: Application of item response theory to statistical parallelism
Chulalongkorn University|Chulalongkorn University|Chulalongkorn University
research aimed 1 investigate statistical parallelism reading literacy instruments level overall test sets 2 examine whether characteristic curves information functions statistical item response theory irt methods parallelism yield comparable scores levels test forms well individual itemsthe population ninth graders secondary schools secondary education service area office 1samples examined total 525 studentsthe instruments three parallel multiplechoice test sets designed elicit reading literacy skillseach test set consisted two 20multiple choice test formsparallelism analyzed respect means standard deviations reliabilities item parameter estimates characteristic curves information functionsit found statistical parallelism among three test sets terms means standard deviations reliabilities item parameter estimatescronbachs alpha coefficients 8184and 83respectivelythe oneway analysis variance results presented similar mean scores f 0325 p 723equal level discrimination f 0194 p 824and equal level difficulty f 0761 p 470moreover characteristic curves test information functions yielded similar degrees parallelism test form itembyitem levelsinteresting findings respect statistical parallelism presented discussed