Eleven study characteristics were coded for each study. In addition to document source and global versus summative ratings, the following study characteristics were coded: year of publication, coder, status differences, setting, time in relationship, quadrant/octant/other description of behavioral tendencies, instrument used, statistic from which effect size is calculated, and sample size. Some of these variables could be very important to an understanding of complementarity and in remediating the heterogeneity among studies in this sample. However, only the first two were dichotomous, and thereby lent themselves readily to analysis in DSTAT, so only the first two were used in the present study. In a more elaborate meta-analysis, all of these study characteristics would be tested as potential moderating variables.