Student Awareness of Space Science: Rasch Model Analysis for Validity and Reliability

Roslinda Rosli, Mardina Abdullah, Nur Choiro Siregar, Nurul Shazana Abdul Hamid, Sabirin Abdullah, Gan Kok Beng, Lilia Halim, Noridawaty Mat Daud, Siti Aminah Bahari, Rosadah Abd Majid, Badariah Bais


Validity and reliability are crucial when conducting research to ensure the truthfulness of an instrument. This study investigated the measurement functioning of an instrument on students' awareness of space science. The instrument was administered to 206 secondary school students involved in the Sudden Ionospheric Disturbance π outreach program. Two experts evaluated the content validity of the instrument. Data were analyzed using the Winsteps software to obtain the Rasch model analysis (RMA) on item reliability and persons' separation, item measure, item fit based on PTMEA CORR, polarity items, misfit items, unidimensionality, and a person-item map. The findings revealed that the items are valid, reliable, and appropriate to measure awareness of space science.

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Copyright (c) 2020 World Journal of Education


World Journal of Education
ISSN 1925-0746(Print)  ISSN 1925-0754(Online)

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