Trio is a newly developed group-administered instrument designed to measure visual ability for application in cognitive styles research. This study investigated the validity of Trio as seen in its convergence or divergence with two established tests, one conceptually related and one conceptually unrelated. The correlation of Trio scores with scores on these other two tests was examined using a sample of undergraduate students. The analysis of the relationship between scores on Trio and on the conceptually related Learning Figures Test failed to provide evidence that these two tests are measuring the same construct. At the same time, Trio's correlation with the unrelated ACT English section was shown to be fairly low. This second finding supports the conclusion that Trio scores are not severely confounded by verbal ability level.