Development of a test instrument to measure mathematical communication skills on the topics of three-variable linear equations and two-variable linear inequalities

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Development research method created a reliable assessment tool for mathematical communication skills, validating its effectiveness.

The developed assessment instrument shows a high validity score of 92.80%, confirming its effectiveness in evaluating skills.
Field testing indicated that 12 out of 13 items maintained external validity, affirming the reliability of the instrument.
This research utilized a development approach with expert reviews and field testing, ensuring the instrument's validity and reliability.
The validity and reliability of the test instrument highlight its potential for effectively assessing students' mathematical communication abilities.

Simanullang et al. (2025) studied this question.

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