The present study aimed to examine how intuitive knowledge of sound changed by exposure to scientific knowledge in terms of attribution of material properties to sound. Participants were 70 5th graders, 25 university literature majors, and 28 physics majors. Substantiality and weight were selected as material properties and two questions for each property, four in total, were generated to examine whether they were attributed to sound. Participants were asked to choose one option from among several items and write the reasons for their choice. According to the results of analyses of their descriptions, most of the children consistently attributed substantiality or weight to sound in the two questions on each property, while most of the university students attributed them in one of the two questions. These results suggest that there was a tendency to consider sound as a kind of material in all three groups, though not equal in the degree of consistency. For the questions on substantiality, answers based on intuitive knowledge decreased while those based on scientific knowledge increased in the order of 5th graders, literature majors, and physics majors. For the questions on weight, however, the same pattern was observed in the answers based on intuitive knowledge, while those based on scientific knowledge did not increase. In particular, only one physics major consistently answered in the scientifically correct way, which was fewer than literature majors. These results indicate that incorrect intuitive knowledge of sound was gradually revised to be more relevant to scientific knowledge, though the property of weight was more difficult to dissociate from sound than substantiality.
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