بناء مقياس اتجاهات معلمي العلوم نحو العمل المخبري

Abstract EN

This study aimed at constructing an attitudinal scale for science teachers towards laboratory work.

To achieve the objectives of the study a preliminary Likert rating scale of 83 items was constructed.

The scale was administered to a randomly selected sample of 224 teachers.

The results indicated that 58 items fit the assumptions of the rating scale model derived from the modern theory (Rasch model).

The scale in its final form exemplifies suitable psychometric properties with a reliability coefficient of 0.98.

The scale also has several validity indicators.

The results showed that the scale presents the highest amount of information for persons with moderate ability.

The mean of ability values was θ= 0.35 which is approximately equal to the mean values for the difficulty of items b=0.36.

These results conformed with the expected value by the model.

(Keywords: Attitudinal Scale, Laboratory work, Item Response Theory, Rasch Model, Rating Scale Model.)