請問什麼是trackinglevel? - 社會議題

在英文期刊上看到 "this attitude varies when the variables of gender and tracking level are examined."
這句話是說性別和"tracking level" 的變數,想請教一下,這個"tracking level"指的是什麼呢? Thanks a lot!
Update:
謝謝Johnny,但追蹤等級意思有點怪怪的.
感謝Shari,我猜的意思也跟您所說的差不多,但能否有比較明確一點的翻譯.
這是一篇關於學生對於文化或其他方面差異的態度的研究.所以有可能是研究方法裡的專有名詞.
我再多po一些內容,麻煩各位在幫我看看, Thanks again.
Update 2:
The aim of the research reported in this paper was to study and analyse student
attitudes towards ethnic diversity and their expectations regarding the school in
creating positive attitudes. The results show that the majority of the students
embrace a positive attitude towards multicultural society.
Update 3:
However, this attitude
varies when the variables of gender and tracking level are examined. Most students
support a strong stand for taking an active approach against racism in school.