The Urgency of Developing a Four-Tier Diagnostic Test Instrument and Its Validity

Hidayatul Aula Hardiyanti (KH. A. Wahab Hasbullah University)
Novia Ayu Sekar Pertiwi (KH. A. Wahab Hasbullah University)
Ino Anga Putra (KH. A. Wahab Hasbullah University)
Kartika Wulandari (KH. A. Wahab Hasbullah University)

SCHOOLAR: Social and Literature Study in Education
Vol. 6 No. 1 (2026): June

A valid diagnostic test instrument is an important component in accurately identifying student misconceptions. This study aims to examine the urgency and validity of the Four-Tier diagnostic test instrument on temperature and heat. The method used is research and development (R&D) with the Borg & Gall model adapted from Sugiyono. The validity of the instrument was tested through assessments by material experts and learning evaluation experts using a four-point Likert scale. The results showed that all test items received good to excellent categories, indicating that the instrument has adequate content and construct validity. These findings confirm that a valid Four-Tier diagnostic test instrument can be a reliable tool in uncovering student misconceptions in physics learning.