Abstract
ChronoView is a visualization method of representing periodic features of the occurrence of events. It expresses a set of time stamps in the position on a plane. Although ChronoView offers high space efficiency, it can generate ambiguous representations. To solve this problem, glyphs have been exploited as ChronoView markers. This paper explains a user study conducted to investigate the effectiveness of the Star Glyph and Ring Glyph. The study shows that glyphs contribute to an accurate reading of temporal features. It also shows that Star Glyph and Ring Glyph have different features. It is clear that, whereas Ring Glyph dominates the time range reading, Star Glyph dominates the comparison of frequencies in the unit of time.