Indonesia Conference Directory

Visualization ability (spatial ability) is needed in understanding integral calculus. This article discusses changes in the spatial ability of a student in drawing graphs of functions to determine the volume of the solid of revolution after obtaining treatment. The treatment is in the form of questions that encourage the subject to be able to draw the graph correctly. This research is a qualitative descriptive study with a single subject. The subject in this study was 6th semester student of mathematics education study program at one of the private universities in Yogyakarta. The selection of a subject from 44 students was done by giving a question about the volume of the solid of revolution. The subject is asked to drawing the volume of the solid of revolution graphic and determine its volume using integral. The selection of subjects by purposive random sampling based on the uniqueness of the answers to the problems given and good communication skills. This study aims to describe changes in the spatial ability of subject in drawing the volume of the solid of revolution graphic after getting treatment. Before getting treatment, a subject is still not right in drawing volume of the solid of revolution graphic. After getting treatment, there is a gradual change in spatial ability. The results of the study show that giving treatment can help increase a student-s spatial ability gradually.