Indonesian Review of Physics, Volume 1, Number 2, 2018 42 Analysis of metacognition difficulties in problem-solving static fluid material in term of Hippocrates – Galenus personality type Eni Setyawati, Susilawati, Dwi Sulisworo Masters in Physics Education, Postgraduate Program, Universitas Ahmad Dahlan, Yogyakarta Kampus 2, Jl.Pramuka 42, Sidikan, Umbulharjo, Yogyakarta 55161 Pcczalfa13@gmail.com Abstract – Describing student's metacognition difficulties and thinking the process in problem- solving static fluid material in each melancholic, sanguinic, phlegmatic, and choleric (Hippocrates - Galenus) personality type. This data analysis method uses a Likert scale as a measurement scale. The data analysis technique used was grouping data into four categories: Understanding The Problem, Devising A Plan, Carrying Out The Plan, Looking Back. The cause of students' metacognition difficulties caused by a lack of understanding the concept of physics, knowing symbols, formulations, notations, and calculations that will be done in each problem solving, and lack of understanding strategies in problem-solving. Students who had a melancholic, sanguinic, choleric personality type were students who had metacognition difficulties when understanding and solving the problem, and also had problems in considering strategies and realizing the use of using strategy. Students who had the Phlegmatic personality type were able to understand the problem by looking at the problem and then making an image so that it can change the information into the form of physics. Keywords: Metacognition Difficulty, Problem Solving, Hippocrates - Galenus Personality Type I. Introduction The development of science and technology in people's lives has brought consequences for the world of education to make various adjustments immediately to be able to prepare students who are ready to compete and be able to face various complex life challenges. This is in accordance with law number 20 of 2003 concerning the national education system that national education aims to develop the potential of students to become human beings who believe and devote to the almighty god, are noble, healthy, knowledgeable, capable, creative, independent and become democratic citizens and sensitive to the challenges of the times. It supported by karwono & mularsih that learning is a series of activities designed to enable the learning process to occur to students. The learning contains several aspects including initiation, facilitation, and improvement of the learning process of students while the components in learning are goals, materials, activities, and evaluation of learning [1]. Today, school is no longer the dominant place for learning. Students now can learn about the universe and all phenomena from various sources, at home, community, and anywhere in any way that is different from the past. Several main trends in the learning environment affects the way of learning, namely virtualization, theme-based learning, and personal learning, with some of this trend, will provide the new insights [2]. So, the use of metacognition skills in learning is very important so that the government sets the graduate standard of high school in the 2013 curriculum must have factual, conceptual, procedural knowledge [3]. "The problem solving as a thinking process by which the learner discovers a combination of previously learned rules that he can apply to solve a novel problem" [4]. Many theories used in understanding the personality type of students. One theory that is often used and continues to be developed is the personality theory of hippocrates- galenus typology [4]. II. Theory A. Definition of metacognition "Metacognition refers to high order thinking which involves active control over the cognitive processes engaged in learning." the meaning of that sentence is the metacognition refers to high-level thinking that involves the active control of the cognitive process in learning. The component of metacognition ability in problem-solving consists of knowledge and skill components [5-6]. B. Problem Solving Problem-solving steps include Understanding the Problem (Understanding the Problem), Making a problem-solving plan (Devising A Plan),