Abstract: The Embedded Figure Test (EFT)was used to examine the congnitive styles of 254 senior middle school students.The results indicated that:1)The development of congnitive styles of senior middle school students were relatively stable.2) There was a significant sex difference in The development of congnitive styles of senior middle school students.3)The classification of science and art classes did not have significant influence on the students'congnitive styles of development.4) There was no significant relation between the students' cognitive styles (field dependence-independence)and their Chinese language achievement and mathematics achievement.

Key words: congnitive styles, field dependence-independence, senior middle school students, sex difference