researches focused mainly on children.Few of them have revealed how music instruments affect the academic performance of college students.2)The surveyors neither sampled a suffident number of students,nor selected randomly among students from different areas and age groups.Objects of observation are limited in a certain age and area range,yet these studies cannot lend to credible supports for those articles'condusions.For example,Costa-Fiori(2004)'s research only involved 117 fourth-grade children,and Cortex(2008)'s survey included merely 32 children.3)Most of the previous researches drew hasty condusions based on short-term studies. For instance,Costa-Giomi(2004)gave three years of piano teaching,and Cortex(2008)'s survey only lasted for 9 months. 3 Method（3.1付尚扬3.2徐瑾卿) 3.1 Using questionnaires to collect objective facts of students ( 3.1.1 Participants The participants were SJTU students from various majors and grades who could play musical instruments.They took the questionnaires in SJTU's piano room when they went there to practice the musical instruments,which can ensure that all the respondents can play musical instruments 3.1.2 Instruments The research employed questionnaires to collect information about students'musical instruments and their school marks.In the questionnaire,students would be asked several brief questions which included their gender,major,grade ranking and how long had they learned to play the music instrument.The questionnaire was designed for those who played the musical instruments.So the research did not have a control group to compare with.We just compared the results with the average.In this way,the error could be reduced and the research was simplified. 3.1.3 Data collection procedure The activity center has 17 piano rooms which means about 15 students come here to play musical instruments each hour.We printed 100 copies of the questionnaires and put them at the register table where students would walk by before entering piano rooms.The staff there helped us to deliver questionnaires to the students who voluntarily took them.Two days later,we got 83 effective questionnaires. 3.1.4 Data analysis Students were divided into two classes,those who majored in liberal arts and in science and engineering.Distribution charts of their grade ranking were plotted and the mean scores were calculated.By analyzing the results,we could find out the link between students'musical instruments and their school marks. 7/147 / 14 researches focused mainly on children. Few of them have revealed how music instruments affect the academic performance of college students. 2)The surveyors neither sampled a sufficient number of students, nor selected randomly among students from different areas and age groups. Objects of observation are limited in a certain age and area range, yet these studies cannot lend to credible supports for those articles’ conclusions. For example, Costa-Fiori(2004)’s research only involved 117 fourth-grade children, and Cortex(2008)’s survey included merely 32 children. 3)Most of the previous researches drew hasty conclusions based on short-term studies. For instance, Costa-Giomi(2004) gave three years of piano teaching, and Cortex(2008)’s survey only lasted for9 months. 3 Method（3.1 付尚扬3.2 徐瑾卿） 3.1 Usingquestionnairestocollectobjective facts ofstudents（付尚扬） 3.1.1 Participants The participants were SJTU students from various majors and grades who could play musical instruments. They took the questionnaires in SJTU’s piano room when they went there to practice the musical instruments, which can ensure that all the respondents can play musical instruments. 3.1.2 Instruments The research employed questionnaires to collect information about students’ musical instruments and their school marks. In the questionnaire, students would be asked several brief questions which included their gender, major, grade ranking and how long had they learned to play the music instrument. The questionnaire was designed for those who played the musical instruments. So the research did not have a control group to compare with. We just compared the results with the average. In this way, the error could be reduced and the research was simplified. 3.1.3 Data collection procedure The activity center has 17 piano rooms which means about 15 students come here to play musical instruments each hour. We printed 100 copies of the questionnaires and put them at the register table where students would walk by before entering piano rooms. The staff there helped us to deliver questionnaires to the students who voluntarily took them. Two days later, we got 83 effectivequestionnaires. 3.1.4 Data analysis Students were divided into two classes, those who majored in liberal arts and in science and engineering. Distribution charts of their grade ranking were plotted and the mean scores were calculated. By analyzing the results, we could find out the link between students’ musical instruments and theirschool marks