Analysis Profile of Student Misconceptions on The Concept of Fluid Based Instrument Three-Tier Test

The purpose of this research was to analyze the misconception profile of eleventh senior high school students about the concept of fluid. The sample of this research was the eleventh students of science class Karanganyar state Senior High School I and Gondangrejo state Senior High School of Religion with 98 students. The analysis of students' misconception profile used the instrument of three-tier concept-based test. The item consists of 28 items that consist of three level of completion stage, the first level is multiple choice questions, the second level is a description of the reasons the student's answer to the first level questions, as well as the third level, is the students level of confidence on the answers have been given. The result shows that 27, 58 % of students understand the concept of fluid, 45,29% of students don't understand the concept of fluid, 24,74 % of students shows misconceptions and 2,36% of students had errors. The highest misconception was in the concept of Pascal with average 13,96%. Therefore it was concluded three-tier test can be identified misconception as well as the cause of this misconception, such as false positives, false negative to lack knowledge.