The type of study-design that has been demonstrated in the given situation would be:
1). Longitudinal
"Longitudinal study design" is described as the study that aims to assess a group of the same subjects to observe the changes in their behavior over a period of time.
In the given situation, the study attempts to examine the students' behavioral development across time leading to schizophrenia.
Thus, option 1 is the correct answer.
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