ABSTRACT Husna, Niesa ‘Amalia (2022). An Item Analysis on Discrimination Index of English Summative Test in SMP N 2 Grabag. An Undergraduate Thesis. English Department. Faculty of Education and Teachers Training, Universitas Tidar. Advisor I Carolus Prima Ferri Karma, M.Pd., Advisor II Gilang Fadhilia Arvianti, S.S., M.Hum. Keywords: Item Analysis, Discrimination Index, Summative Test. …