As it can be seen from Table 2, The Cronbach alpha reliability coefficient for the whole instrument was 0.87 ranging from 0.54 to 0.85 for the scales.
Another instrument used in this study was the “Science Attitude Scale (SAS)” developed by Geban, Ertepınar, Yılmaz, Atlan & Şahpaz (1994). This scale aimed to investigate primary students’ attitudes toward science. SAS included 15 items for which the reliability was found to be 0.83. Also students’ science achievement mean scores were obtained from their schools.