The Development and Item Analysis of the Standardized Achievement Test for Thai Learners for Aiding in Diagnosing Learning Disorder

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Janyaporn Jiamjareonkul
Savika Chaiboonyarak
Chaiyun Sakulsriprasert
Kulvadee Thongpibul
Araya Pontanya
Wansiri Panyo
Siree Udomphol
Siwaporn Tuitemwong


Objective: To develop the Standardized Achievement Test for Thai Learner (SAT) and to examine the psychometric properties of SAT, including content validation and item analysis.

Methods: The current study consisted of 2 phases. The first phase was the scale development process. The second phase was the try-out phase, with 375 Thai students, which investigated item difficulty and item discrimination.

Result: The SAT comprises 11 subtests; Letter Word Identification, Applied Problems, Spelling, Passage Comprehension, Calculation, Writing Sample, Word Attack, Oral Reading, Sentence Reading Fluency, Math Fact Fluency, and Sentence Writing Fluency. The content validation of the SAT was conducted by the expert panel. Additionally, it was found that the SAT had appropriate item difficulty and item discrimination.

Conclusion: The content validity, item difficulty and item discrimination of The SAT are supported. The norm of the SAT should be further developed.


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Jiamjareonkul จ., Chaiboonyarak ส., Sakulsriprasert ไ., Thongpibul ก., Pontanya อ., Panyo ว., Udomphol ส., & Tuitemwong ศ. (2022). The Development and Item Analysis of the Standardized Achievement Test for Thai Learners for Aiding in Diagnosing Learning Disorder. Journal of the Psychiatric Association of Thailand, 67(2), 180–192. Retrieved from
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