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Abstrak The objective of this research is to describe kinds of error and causes in completing mathematical set problems. In this research sampling technique was used to take sample is purposive sampling. This research can be categorized as descriptive research involving 31 college students of mathematics education program the first semester of the academic year 2019/2020 as research participant. Data collection is done through tests and interviews. The test was used in the form of a five-item description test. The students' errors were identified and categorized into 7 types of errors namely inappropriate data, inappropriate procedure, omitted data, omitted conclusion, response level conflict, indirect manipulation, skill hierarchy problem. In addition to the above seven categories errors that fall into this category include not responding. The result of this research showed that most of the students' errors was on omitted conclusion with the percentage of 29,03% and followed by omitted data with 20,97%, and response level conflict was 17,74%. The factors that influence students to make mistakes in solving set problems are students do not understand some number concepts, do not understand the set operations and symbols, and are not proficient in proving a statement. Also, the students being embarrassed to ask questions in class which they have actually learned so that it causes students to answer based on prior knowledge.

Analisis Kesalahan Mahasiswa Dalam Meyelesaikan Soal Himpunan di Program Studi Pendidikan Matematika UIN SUSKA RIAU