Validity and Reliability of Students’ Science and Technology Culture Instrument (BST-M) using Rasch Measurement Model

Students’ Science and Technology Culture Instrument (Budaya Sains dan Teknologi Murid, BSTM) was developed to measure the level of Science and Technology Culture among the students. A total of 800 Form Two students from several schools in Seremban, Negeri Sembilan have been selected as a sample study. This study was conducted to determine the reliability and construct validity of the instrument using Rasch Model via Winstep 3.73 software. The constructs consist of Value and Perception on Science and Technology (B); Perception on Science and Technology (C); Scientific Attitude and Common Practice (D); Scientific Mind Habits and Environmental Concerns (E); and Personality Traits (F). From the analysis, it is found that PTMEA Corr has a positive value, in which items are able to differentiate the capabilities of the respondents. Besides, the results of infit and outfit mean square are ranged between 0.60 and 1.4. The quality of items is high because the reliability value is also high. In addition, the separation of item and person is at the acceptable range. However, statistical data shows that 8 out of 110 items need to be modified.