Fig. 2
Illustration of the different types of student pairs, with increasing level of expected contact. Each student in the data is paired with different type of students. The example shows the process for one student named Alex. Group 1: Students who attend a different primary school than Alex and a different secondary school. Group 2: Students who attend the same primary school than Alex and a different secondary school. Group 3: Students who attend the same primary and secondary school than Alex, but are placed in a different program track in the secondary school. Group 4: Students who attend the same primary and secondary school than Alex, and are placed in the same program track in the secondary school.
