Abstract: It has been hypothesized that there are two different kinds of spatial-relation representations in human brain: categorical and coordinate spatial relations representations. With integrating categorical spatial relation and metric/coordinate spatial relation, this study examined the visuospatial relations judgment based on clue. Experiment 1 was conducted to test the effect from different degree on visuospatial relations judgment. It was found that the effect was not significant. The results of Experiment 2 with one clue showed that when target was input of scope made of central clue and borderline, the judgment was faster than target was output of the scope. The input/output effect was not confirmed by experiment 3&4, which were carried out with double clue slope clue (k=0.38) on visuospatial relations judgment.

Key words: visuospatial relation judgment, input/output effect, clue