Assessment of counselor trainee applicants with respect to level of cognitive complexity might prove a useful additional criterion in selection of students for training programs. To determine the correspondence between a measure of counselor effectiveness and five cognitive complexity measures, 38 subjects, master's degree students in counseling, completed each of five cognitive measures and were rated by their practicum supervisor on their effectiveness in actual counseling interviews. No significant correlations were found between the measures, nor did any combination of instruments permit prediction of counselor effectiveness with any statistical significance. Other interpretations are possible, including that the sample may have been sufficiently homogeneous with respect to cognitive complexity that subject differences in this domain could not produce statistical significance. Future investigations should focus on the utility of the construct of cognitive complexity as it relates to counselor selection, counseling, and counseling effectiveness. (Author/CKJ)