Abstract
In order to produce high-quality research, the good instrument is required. The instrument developed in this study was a spatial sense test instrument. The test items were based on indicators of spatial sense. After prepared the test items then tested to determine the validity, reliability, level of difficulty and distinguishing power. The results show that the questions were compiled for this study generally has a high validity, reliability is very high, distinguishing power for each items is well, and the questions are divided by varied level difficulty (easy, medium and difficult). Based on this result, it can be concluded that the spatial sense test items that developed can be used as a test instrument for future research.
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