(7) all data required for meta-analysis were from intervention studies with
experiment and control groups, intervention studies with one
group, and cross-sectional studies. The required data for intervention
studies with experiment and control groups included
sample size of experiment and control groups, mean score and
standard deviation of pre- and post-test of experiment and
control groups. In the case of data where pre- and post-test
scores were not reported, mean score and standard deviation
of change between two tests of experiment group and control
group were required. For intervention studies with one group,
required data included sample size, mean score and standard
deviation of both pre- and post-test. In the case of data where
pre- and post-test scores were not reported, mean score and
standard deviation of change between two tests were required.
For cross-sectional studies, required data included sample size
of both experiment and control groups, mean and standard deviation
of tests scores between experiment and control groups.