Graphing Calculator Circles Topic Test (GCCTT) Item developed based on the Table of Test Specification 3 Dimension (ToTS 3D) to test the skills of students in terms of graphics calculator skills and circles topic content. GCCTT Item consists of 20 items graphing calculator skills and 14 items of circle topic content. A pilot study using a descriptive quantitative approach carried out in 30 of students Form Two in two schools in Negeri Sembilan using simple random sampling method. To ensure quality GCCTT Item, the item was analysed using the Rasch Model for looking the reliability and validity of items. Reliability derived from the reliability index, meanwhile validity from the point measure correlation (PT-MEA Corr.), Outfit Mean Square (MNSQ) and the Z Standardized (ZSTD). The findings show that GCCTT Item has a high reliability value, 0.85. There are no misfit items detected on graphic calculator skills item except one misfit item detected on circle topic content item. After misfit item dropped, 33 GCCTT Items with quality value and PT-MEA Corr. positive can be produced to test the skills of graphic calculator and circles topic content.
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