This article reports the development and testing of a technique to measure the level of reflective thinking. To ensure validity, the attributes measured were derived from extensive literature on reflective thinking, particularly the writing of Mezirow. A combination of literature review and initial testing led to the development of a four-scale system measuring four aspects; habitual action, understanding, refl ection and critical refl ection. The polish version of the technique was tested with a sample of 49 students from a social pedagogic faculty. The reliability of the scale was established by acceptable Cronbach alpha values.