Abstract
This is a basic research study to make clear the cognitive process in child s learning activities. The study was undertaken to measure plethysmograph and respiratory cycles in 13 undergraduate student, as induced by observation of natural phenomena to obtain the necessary information for problem solving. Pulse rates, pulse wave amplitudes, pulse wave areas, respiration rates, respiration wave amplitudes, and respiration wave areas were analyzed as indexes by using R-mode factor analysis, R-mode cluster analysis and Q-mode factor analysis. From the results of R-mode factor analysis, the six indexes were divided into four groups. From the results of R-mode cluster analysis, the indexes were divided into two groups. The objective of this paper is to make clear the relationships among the indexes showed by R-mode factor analysis and cluster analysis. Q-mode factor analysis was used for this objective. The results showed that the six indexes should be used to analyze plethysmograph and respiratory cycles induced by the observation of natural phenomena for Q-mode factor analysis, though the indexes have the relationships showed by R-mode factor analysis and R-mode cluster analysis.
