Participants
The researchers estimated that a sample of 17,651 Brazilian
college students should be invited to take part in this study
(as described in detail elsewhere).13 Thus, given that the
classes were each composed of an average of 19 college
students (a number that varied among HEIs and Brazilian
state capitals), it was estimated that a total of 929 student
classes should be sampled nationwide to reach the previously
estimated sample size. Additionally, to sample a total of 929
student classes, 114 HEIs needed to be drawn nationwide (at
least two public and two private HEIs from each Brazilian
state capital), except for the public HEIs strata in the capitals
of Rondônia, Acre, Amapá, Sergipe and Mato Grosso do
Sul States (where there was only one public HEI) and in the
capital of São Paulo State (where more HEIs were selected
for the purpose of gathering a greater variety of responses).