Abstract
Affective evaluation using symbolic distance effect (SDE) in science classes was investigated. In the study, subjects were elementary school student. In the first experiment, they were presented with pairs of animal pictures. They were instructed to choose the member which is preference. The reaction time to choose the preference member varies inversely with steps between their preference order. In the second experiment, subjects' reaction times were measured at twice; before the dissection experiment and after it. Change of students' preference expressed in change of preference member and change of reaction time.
