Abstract
The response time of the MCT was analyzed using the stereographic mental cutting test (SMCT) and the standard MCT. The principal results were as follows: (1) Total response time was shortened by about 30% as a consequence of using stereograms. (2) The correlation coefficient between response time and correct response rate indicate intermediate correlations in both tests. The results appear to suggest that the shorter the response time of a problem, the higher is its correct response rate. (3) By using stereograms depth cues were more easily recognized by subjects. Thus the process in recognizing 3-D shapes and location of cutting planes (Phase 1) was assisted and subjects im-proved their correct response rates and were shortened the re-sponse time required in the phase. (4) The problems in which errors occurred in the phase of Cutting the solid by the assumed cutting plane (Phase 2) or in the phase of judging the characteristic quantity (dimension) of the section (Phase 3), if necessary, did not show any improvements in their correct response rates even when using stereograms, although their response times required in the process of Phase 1 were shortened.
