إستخدام أسلوب ثيرستون لأسلوب الفئات المتساوية ظاهريا في انتقاء فقرات لقياس الاتجاهات نحو الفيزياء
The aim of this study was to select attitude items toward physics according to equal appearing intervals technique. Large number of judges, experts in the area, individually sorted the favorableness of each 69 items in terms of an attitude toward physics subject, into 11 piles from most favorable to extremely unfavorable. 20 items were finally selected which get maximum support from the expert judges as indicated by the scale value (median), they were at equal intervals on the Continuum (from 1 to 11), and had the smallest interquartile range. Reliability and validity of the 20 selected items for the final form of the scale was investigated by applying the scale on 279 students Cronbach Alpha was 0.87. The scale has internal consistency and validity indicators. (Published abstract)