We obtained test scores for each subject on a measure of academic
ability (ACT or SAT scores) and on three tests of critical
thinking, the WGCTA, the CCTT, and the R. We counter-balanced
the test order by subject for the critical thinking tests. Where SAT
rather than ACT scores were available for the graduate sample, we
used James Maxey and Oscar Lenning's (1974) concordance tables
for conversion. Only GRE scores were available for four subjects; in
these cases, we transposed GRE scores to ACT equivalents with this
formula: ACTCOMP = 9.85 + GRETOTAL x.015