Forum 4: Compare the
achievement trends of a true cohort and a quasi-cohort In Figure 3, in my paper
on longitudinal achievement trends, you are shown a longitudinal
comparison of achievement for a true cohort and a quasi-cohort of students
over Grades 1-6 over six years. Over the years, the achievement levels of
the true cohort have declined rather steadily. While initially slightly
below the true cohort, the achievement of the quasi-cohort improved to a
level above the true cohort, where after it declined rather precipitously
to a level four points below the true cohort. Using the corresponding
enrollment data (Table 4) over the same years, attempt an explanation for
the achievement trends of the two groups. In other words, try to explain
what is going on? You can work independently, in groups (just, when
responding as a group, indicate the group membership), or both. However,
you should use the commentary of each other in solving the problem. I will
give you my explanation after most of you have responded. Good luck!
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