Abstract
This research sought a better understanding of perceptual constancy in dynamic touch. It is argued that both traditional
and ecological approaches are inadequate and that some qualitative experimental phenomenology analyses should be
applied in addition to quantitative psychophysics methods. In an experiment, participants were asked to report the
perceived length of rods by dynamic touch. Thereafter, self-reported changes in their impressions owing to different
ways of wielding the rods were qualitatively analyzed. Qualitative analyses clarified differences in length perception
that have not been investigated by quantitative approaches. To explore constancy in dynamic touch, it is preferable to
integrate qualitative and quantitative approaches without eliminating the effects of different ways of wielding the
material.
