A coding book was created, which included information about the
study variables and the special code for each level of categorical
variables (e.g., the EI test; see Table 2)1. The first
and the second authors met twice to discuss the coding and clarify any
issues before starting the independent coding in the coding
sheet. In addition to coding the study moderators, each coder1 Age was treated as a continuous variable
independently retrieved the effect size (i.e., Pearson correlation) and
the sample size associated with it. A column for notes was included for
the coders to make any comments. The two-way interclass correlation
coefficient was high (r = .93; McGraw & Wong, 1996). All cases
with disagreement were individually revisited and resolved.
Insert Table 2 around here